CN210327262U - Power device - Google Patents
Power device Download PDFInfo
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- CN210327262U CN210327262U CN201921715870.1U CN201921715870U CN210327262U CN 210327262 U CN210327262 U CN 210327262U CN 201921715870 U CN201921715870 U CN 201921715870U CN 210327262 U CN210327262 U CN 210327262U
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- motor shaft
- motor
- shaft
- input gear
- wheel body
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Abstract
The utility model discloses a power device, which belongs to the technical field of mechanical transmission and comprises a motor and a gear box, wherein the motor is provided with a motor shaft, and the end surface of the motor shaft is provided with an inner taper hole; the gear box includes the box and sets up in the inside input gear of box, input gear include the wheel body and set up in the back shaft of wheel body one side, the back shaft have can with the interior taper hole forms interference fit's outer conical surface. The motor shaft and the input gear are separately arranged, the outer diameter of the wheel body of the input gear cannot be limited due to assembly problems, and the application range is wide. During production, the motor shaft and the input gear can be respectively machined and thermally treated, so that the production cost is reduced; during assembly, the supporting shaft of the input gear is pressed into the inner taper hole in the motor shaft through external force, and the outer taper surface and the inner taper hole are provided with tapers, so that the press-fitting stroke of interference fit is short, the damage to parts is small, and the service life is long.
Description
Technical Field
The utility model relates to a mechanical transmission technical field especially relates to a power device.
Background
When the motor is used, the motor is usually matched with a gear box so as to achieve the purposes of reducing the rotating speed of the motor and increasing the torque. In the field of wind power generation, a yaw variable pitch gearbox is usually adopted to be matched with a motor, as shown in fig. 1, a motor shaft 10 is supported on a shell of the motor through a motor bearing 20, a central wheel is arranged inside a box body of the yaw variable pitch gearbox, the central wheel is meshed with a planet wheel 30, and the central wheel and the motor shaft 10 are integrally formed to form a gear shaft. The cavity in the box body is separated from the motor by an oil seal 40 sleeved on the shaft of the motor, so that lubricating oil in the box body is prevented from entering the motor. The box body is fixedly connected with the motor through a flange 50, and the motor is connected with the flange through a bolt 60.
The above-mentioned centre wheel and motor shaft 10 integrated into one piece arrangement, when the required external diameter of centre wheel is greater than the internal diameter of the motor bearing 20 or internal diameter of the oil seal 40, the motor bearing 20 and oil seal 40 can't be installed; in addition, the heat treatment requirement required for the center wheel is inconsistent with the heat treatment requirement for the motor shaft 10, the heat treatment difficulty is high, and the heat treatment cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power device to solve the technical problem that the installation difficulty, the processing degree of difficulty are big, with high costs between the motor that exists among the prior art and the gear box.
As the conception, the utility model adopts the technical proposal that:
a power plant, comprising:
the motor is provided with a motor shaft, and an inner taper hole is formed in the end face of the motor shaft;
the gear box comprises a box body and an input gear arranged in the box body, wherein the input gear comprises a wheel body and a supporting shaft connected with the wheel body, and the supporting shaft is provided with an outer conical surface which can form interference fit with the inner conical hole.
The supporting shaft is provided with a first end and a second end along the self axial direction, the inner taper hole is provided with a third end and a fourth end along the self axial direction, the inner diameter of the third end is smaller than the diameter of the first end and larger than the diameter of the second end, and the inner diameter of the fourth end is smaller than the diameter of the second end.
The taper of the outer conical surface is the same as that of the inner conical hole, and the taper is 1/35-1/45.
Wherein, the taper of the outer conical surface is 1/40.
The center line of the inner taper hole is overlapped with the center line of the motor shaft, and the center line of the support shaft is overlapped with the center line of the wheel body.
Wherein, the wheel body and the supporting shaft are integrally formed.
The extension length of the inner taper hole along the self axial direction is larger than that of the support shaft along the self axial direction.
The side surface of the wheel body is abutted against the end surface of the motor shaft.
The motor comprises a shell, a bearing is sleeved on a motor shaft in the shell, and the pair of bearings are arranged at intervals along the axial direction of the motor shaft.
Wherein, the box body is connected with the shell through a flange.
The utility model has the advantages that:
the utility model provides a power device separately sets up motor shaft and input gear, can not restrict the external diameter size of input gear's wheel body because of assembly problem, and application scope is wide. During production, the motor shaft and the input gear can be respectively machined and thermally treated, only the inner taper hole is required to be formed in the end face of the motor shaft, and the outer surface of the motor shaft does not need to be subjected to surface hardening treatment, so that the production cost is reduced; during assembly, the supporting shaft of the input gear is pressed into the inner taper hole on the motor shaft through external force, and the outer taper surface and the inner taper hole have tapers, so that the press-fitting stroke of interference fit is short, the damage to parts is small, and the service life is long; during the assembly, can obtain the interference fit volume through the size of monitoring external force for the interference fit volume can be monitored, and the reliability is high.
Drawings
FIG. 1 is a partial cross-sectional view of a prior art yaw pitch gearbox in cooperation with a motor;
fig. 2 is a partial cross-sectional view of a power plant provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a portion of the structure of FIG. 2;
fig. 4 is a schematic diagram of the motor shaft and the input gear of the power device provided by the embodiment of the invention;
fig. 5 is a partial schematic view of a motor shaft of the power device according to the embodiment of the present invention;
fig. 6 is a side view of an input gear of a power device according to an embodiment of the present invention.
In fig. 1:
10. a motor shaft; 20. a motor bearing; 30. a planet wheel; 40. oil sealing; 50. a flange; 60. a bolt;
in fig. 2-6:
1. a motor; 11. a housing; 12. a motor shaft; 121. an inner taper hole; 13. a bearing;
2. a gear case; 21. a box body; 22. an input gear; 221. a wheel body; 222. a support shaft; 23. a flange; 24. a planet wheel; 25. a planet carrier; 26. a ring gear.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
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.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 2 to 6, an embodiment of the present invention provides a power device, which includes a motor 1 and a gear box 2, and can provide power for a wind turbine generator set or other devices.
The motor 1 comprises a shell 11 and a motor shaft 12, one end of the motor shaft 12 is a supporting end which is positioned in the shell 11, the other end of the motor shaft 12 is a connecting end, and the connecting end extends out of the shell 11. A bearing 13 is sleeved on the motor shaft 12 in the housing 11, and a pair of bearings 13 is arranged at intervals along the axial direction of the motor shaft 12 to support the motor shaft 12. An inner taper hole 121 is opened on the end surface of the motor shaft 12, and specifically, the inner taper hole 121 is opened on the end surface of the connecting end.
The gear box 2 includes a box body 21 and an input gear 22 disposed inside the box body 21, the input gear 22 includes a wheel body 221 and a support shaft 222 connected to the wheel body 221, and the support shaft 222 has an outer tapered surface capable of forming an interference fit with the inner tapered hole 121. Specifically, the supporting shaft 222 is disposed on one side of the wheel body 221, and the diameter of the supporting shaft 222 is smaller than that of the wheel body 221.
The motor shaft 12 and the input gear 22 are separately arranged, so that the outer diameter of the wheel body 221 of the input gear 22 is not limited due to assembly problems, and the application range is wide. During production, the motor shaft 12 and the input gear 22 can be machined and heat treated respectively, only the inner taper hole 121 needs to be formed in the end face of the motor shaft 12, the outer surface of the motor shaft 12 does not need to be subjected to surface hardening treatment, and production cost is reduced. During assembly, the supporting shaft 222 of the input gear 22 is pressed into the inner taper hole 121 on the motor shaft 12 through external force, and the outer taper surface and the inner taper hole 121 both have tapers, so that the press-fitting stroke of interference fit is short, the damage to parts is small, and the service life is long; meanwhile, the interference fit amount can be obtained by monitoring the magnitude of the external force, so that the interference fit amount can be monitored, and the reliability is high.
In assembly, after the motor 1 is assembled, the input gear 22 may be press-fitted to the motor shaft 12 at room temperature using a press machine. Because interior taper hole 121 and the outer conical surface all have the tapering, interference fit pressure equipment stroke is shorter, obtains the pressure value through the reading on the press, can derive according to the pressure value and obtain the interference fit volume for quality control.
The supporting shaft 222 has a first end connected to the wheel body 221 and a second end far from the wheel body 221 along its axial direction, and the diameter of the first end is larger than that of the second end. The inner taper hole 121 has a third end and a fourth end along its own axial direction, the third end is located outside, the fourth end is located inside, and the diameter of the third end is greater than that of the fourth end. The third end has an inner diameter less than the diameter of the first end and greater than the diameter of the second end, and the fourth end has an inner diameter less than the diameter of the second end to enable an interference fit between the inner tapered bore 121 and the outer tapered surface.
When the support shaft 222 is just inserted into the inner taper hole 121, the insertion is smooth without external force press fitting because the inner diameter of the third end is larger than that of the second end; since the inner diameter of the fourth end is smaller than the diameter of the second end, the supporting shaft 222 requires external force for press-fitting when the second end reaches a position smaller than the diameter thereof during the insertion process, and therefore, the press-fitting stroke is short due to the interference fit of the tapered surfaces.
The taper of the outer conical surface is the same as that of the inner conical hole 121, so that the contact area is large, and the stability of interference fit is high. The taper is 1/35 ~ 1/45, and the taper is less, and because the axial force that pressure produced is far less than frictional force, can not lead to input gear 22 to deviate from. In this embodiment, the taper of the outer tapered surface is 1/40.
The central line of the inner taper hole 121 coincides with the central line of the motor shaft 12, and the central line of the support shaft 222 coincides with the central line of the wheel body 221, so that the stress is uniform in the transmission process. If the center line of the inner taper hole 121 is offset from the center line of the motor shaft 12, the center line of the support shaft 222 is offset from the center line of the sheave body 221 so that the center line of the sheave body 221 can coincide with the center line of the motor shaft 12 after assembly.
The wheel body 221 and the supporting shaft 222 are integrally formed, so that the processing and the production are convenient, and the structural strength is increased. At this time, the diameter of the wheel body 221 may be set as required, and may be larger than the diameter of the motor shaft 12 or smaller than the diameter of the motor shaft 12, without affecting the assembly of the bearing 13 and the oil seal on the motor shaft 12.
The extension length of the inner taper hole 121 along the self axial direction is greater than that of the support shaft 222 along the self axial direction, so that after the support shaft 222 completely enters the inner taper hole 121, the inner taper hole 121 has a margin, on one hand, the inner taper hole is related to the hole machining process, on the other hand, the support shaft 222 can be guaranteed to be completely inserted into the inner taper hole 121, the contact area is maximum, and the transmission stability is high.
The side surface of the wheel body 221 abuts against the end surface of the motor shaft 12, and based on the fact that the extension length of the inner taper hole 121 in the self axial direction is greater than that of the support shaft 222 in the self axial direction, the support shaft 222 can completely enter the inner taper hole 121 during assembly, so that the side surface of the wheel body 221 abuts against the end surface of the motor shaft 12, and transmission stability can be guaranteed.
The box 21 of the gear box 2 is connected with the shell 11 of the motor 1 through a flange 23. In addition, a two-stage reduction mechanism is provided in the case 21, and both the two-stage reduction mechanism are planetary mechanisms. Wherein, the primary planetary mechanism comprises a planetary gear 24 engaged with the input gear 22 and a planet carrier 25 connected with the planetary gear 24, and of course, the primary planetary mechanism further comprises a gear ring 26 engaged with the planetary gear 24, one end of the gear ring 26 is connected with the flange 23, and the other end is connected with the box 21. The secondary planetary mechanism is not described in detail herein, and reference can be made to the prior art in the field.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A power plant, comprising:
the motor (1) is provided with a motor shaft (12), and an inner taper hole (121) is formed in the end face of the motor shaft (12);
the gearbox (2) comprises a box body (21) and an input gear (22) arranged inside the box body (21), wherein the input gear (22) comprises a wheel body (221) and a supporting shaft (222) connected with the wheel body (221), and the supporting shaft (222) is provided with an outer conical surface capable of forming interference fit with the inner conical hole (121).
2. The power unit as claimed in claim 1, wherein said support shaft (222) has a first end and a second end along its axial direction, said inner tapered bore (121) has a third end and a fourth end along its axial direction, said third end having an inner diameter smaller than the diameter of said first end and larger than the diameter of said second end, and said fourth end having an inner diameter smaller than the diameter of said second end.
3. The power device according to claim 1, characterized in that the taper of the outer taper surface is the same as the taper of the inner taper hole (121) and the taper is 1/35-1/45.
4. The powerplant of claim 3, wherein the taper of the outer tapered surface is 1/40.
5. The power unit of claim 1, wherein a centerline of said inner tapered bore (121) coincides with a centerline of said motor shaft (12), and a centerline of said support shaft (222) coincides with a centerline of said wheel body (221).
6. The power unit of claim 1, wherein the wheel body (221) is integrally formed with the support shaft (222).
7. The power device as claimed in claim 1, wherein the extension length of the inner taper hole (121) in the self axial direction is larger than the extension length of the support shaft (222) in the self axial direction.
8. A power unit according to claim 7, characterized in that the side surface of the wheel body (221) abuts the end surface of the motor shaft (12).
9. A power unit according to any one of claims 1-8, characterized in that the motor (1) comprises a housing (11), a bearing (13) being arranged inside the housing (11) on the motor shaft (12), a pair of said bearings (13) being arranged at a distance in the axial direction of the motor shaft (12).
10. A power plant according to claim 9, characterized in that the connection between the tank (21) and the casing (11) is by means of a flange (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921715870.1U CN210327262U (en) | 2019-10-14 | 2019-10-14 | Power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921715870.1U CN210327262U (en) | 2019-10-14 | 2019-10-14 | Power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210327262U true CN210327262U (en) | 2020-04-14 |
Family
ID=70133834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921715870.1U Active CN210327262U (en) | 2019-10-14 | 2019-10-14 | Power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210327262U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601435A (en) * | 2019-10-14 | 2019-12-20 | 南京高速齿轮制造有限公司 | Power device |
-
2019
- 2019-10-14 CN CN201921715870.1U patent/CN210327262U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601435A (en) * | 2019-10-14 | 2019-12-20 | 南京高速齿轮制造有限公司 | Power device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200508 Address after: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Patentee after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Address before: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Co-patentee before: Nanjing High Precision Transmission Equipment Manufacturing Group Co.,Ltd. Patentee before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220909 Address after: No. 79, Jianheng Road, Jiangning District, Nanjing City, Jiangsu Province, 210012 Patentee after: NANJING HIGH-SPEED & ACCURATE GEAR GROUP Co.,Ltd. Address before: No.30, Houjiao Road, gaoxinyuan, Jiangning District, Nanjing City, Jiangsu Province Patentee before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. |