CN113490805B - Gear device for railway vehicle - Google Patents
Gear device for railway vehicle Download PDFInfo
- Publication number
- CN113490805B CN113490805B CN201980091700.7A CN201980091700A CN113490805B CN 113490805 B CN113490805 B CN 113490805B CN 201980091700 A CN201980091700 A CN 201980091700A CN 113490805 B CN113490805 B CN 113490805B
- Authority
- CN
- China
- Prior art keywords
- gear
- tooth
- pinion
- width direction
- bull
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 244000309464 bull Species 0.000 claims abstract description 18
- 239000000314 lubricant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Gear Transmission (AREA)
Abstract
A gear device for a railway vehicle is provided with: a pinion gear (2) connected to an output shaft of the drive source; and a large gear (4) which is connected with the small teethThe wheel (2) is meshed with the axle (3), and the pinion (2) and the bull gear (4) are respectively composed of circular arc gears, the tooth trace (21, 41) of which is the intersection line of the tooth surface and the pitch circle cylinder is a torsion angle (theta) relative to the generatrix (22, 42) of the pitch circle cylinder at the center (c) in the tooth width direction 1 、θ 2 ) Zero arc shape, radius of curvature (r) of tooth trace (21) of pinion (2) 1 ) Radius of curvature (r) of tooth trace (41) larger than that of large gear (4) 2 ) A cutting end part (5) is arranged at both width direction end parts of the tooth surface of one gear of the pinion (2) and the big gear (4) in a way that the cutting end part does not contact with the tooth surface of the other gear of the pinion (2) and the big gear (4).
Description
Technical Field
The present invention relates to a gear device for a railway vehicle, comprising: a pinion gear coupled to an output shaft of the drive source; and a large gear engaged with the small gear and coupled to the axle.
Background
Conventionally, as a cylindrical gear, a circular arc gear in which a tooth trace, which is an intersection line of a tooth surface and a pitch circle cylinder, is a circular arc shape having a zero torsion angle with respect to a generatrix of the pitch circle cylinder at a center in a tooth width direction has been known (for example, refer to patent document 1). The circular arc gear has the following advantages: the herringbone gear can exert the characteristic of eliminating thrust and can be manufactured as an integral piece. Further, the paired 2 circular gears are arranged with their respective axes parallel and meshed, and are generally used as gear pumps for transferring viscous fluids such as fuel oil and lubricating oil.
The above-described characteristics of the circular arc gear are paid attention to, and thus, application to a pinion gear and a large gear which mesh with each other, which are provided in a gear device for a railway vehicle, is considered. However, in trial production and experiments, the following problems have been found with respect to torque transmission between a pinion gear and a bull gear provided in a gear device for a railway vehicle: the pitch circle has a larger diameter and thus a heavier weight than the circular arc gear for the gear pump, and the gear pump rotates at a high load and a high speed in addition to the larger diameter and the heavier weight, so that deflection occurs at the tooth top portions of the two large and small gears, and contact between one ends of the tooth surfaces engaged due to reduction in thrust performance is eliminated, thereby causing tooth breakage, dent (rattling), and the like. It is known that it is effective to perform crowning (crowning) on the tooth trace in order to eliminate one end contact of the tooth face, but if crowning is performed on the tooth trace, the thrust eliminating performance of one of the above-described features of the circular arc gear is degraded, and other problems such as a deterioration in the thrust suppressing effect are caused.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 11-118023
Disclosure of Invention
In view of the above, an object of the present invention is to provide a gear device for a railway vehicle capable of sufficiently securing thrust performance cancellation and preventing contact of one end of a tooth surface.
In order to solve the above problems, a gear device for a railway vehicle according to the present invention includes: a pinion gear coupled to an output shaft of the drive source; and a large gear meshed with the small gear and connected with the axle, wherein the small gear and the large gear are respectively composed of circular arc gears, a tooth trace of the circular arc gears, which is an intersecting line of a tooth surface and the pitch circle cylinder, is circular arc-shaped with a torsion angle of zero relative to a generatrix of the pitch circle cylinder at the center of the tooth width direction, the curvature radius of the tooth trace of the small gear is larger than that of the tooth trace of the large gear, and cutting ends are arranged at two end parts of the tooth surface of one gear of the small gear and the large gear in the width direction in a mode of not contacting with the tooth surface of the other gear of the small gear and the large gear.
According to the present invention, since the radius of curvature of the tooth trace of the pinion gear is larger than the radius of curvature of the tooth trace of the bull gear, the cutting end portions are provided at both end portions in the width direction of the tooth surface of one of the pinion gear and the bull gear so as not to contact the tooth surface of the other of the pinion gear and the bull gear, the tooth surfaces of the meshing portions of the pinion gear and the bull gear can contact each other at portions other than the cutting end portions of both end portions in the width direction of the tooth surface. Thus, even if deflection occurs in the tooth tip portion due to high-load high-speed rotation, the pinion and the bull gear can sufficiently ensure thrust performance to prevent contact of one end of the tooth surface.
Drawings
Fig. 1 is a perspective view showing an outline of a pinion gear and a bull gear provided in a gear device for a railway vehicle according to the present invention.
Fig. 2 is a schematic view showing a tooth trace of the meshing portion of the pinion and the bull gear shown in fig. 1.
Detailed Description
Referring to fig. 1 and 2, the railway gear device includes a gear box (not shown) provided in a carriage of a vehicle, and includes, in the interior of the gear box: a pinion gear 2 having an axle 1 coupled to an output shaft of a motor as a driving source other than the drawing; and a large gear 4 that meshes with the small gear 2 and is coupled to the axle 3. The output shaft and the axle 3 are arranged in the horizontal direction, respectively, and the axles 1 and 3 are parallel to each other. In addition, a lubricant (not shown) is stored in the inner bottom portion of the gear case, and the lower portion of the large gear 4 is immersed in the lubricant, so that the lubricant is lifted up as the large gear 4 rotates, and the meshing portion, bearings, and the like between the large gear 4 and the small gear 2 are lubricated by the lifted-up lubricant. In addition, since known components, elements, and the like of the railway gear device can be used, a more detailed description thereof will be omitted.
As shown in fig. 2, the pinion gear 2 and the bull gear 4 are each constituted by an arc gear whose tooth trace 21, 41, which is the intersection line of the tooth surface and the pitch circle cylinder, is a torsion angle θ with respect to the generatrices 22, 42 of the pitch circle cylinder at the center c in the tooth width direction 1 、θ 2 Zero arc shape. In addition, anotherIn addition, the radius of curvature r of the tooth trace 21 of the pinion 2 1 Radius of curvature r of tooth trace 41 greater than large gear 4 2 (r 1 ＞r 2 ) A cutting end (sharpening) portion 5 is provided at both ends in the width direction of the tooth surface of the large gear 4 so as not to contact with the tooth surface of the small gear 2.
With such a meshing portion of the pinion gear 2 and the large gear 4, the tooth surfaces can be brought into contact with each other at portions other than the cut end portions 5 of both width-direction end portions of the tooth surfaces. The contact between the tooth surfaces of the pinion gear 2 and the large gear 4 at this portion is a line contact in the tooth height direction when the motor is stopped, and is a surface contact in both directions of the tooth width and the tooth height due to the deflection of the tooth top portion associated with high-load high-speed rotation when the motor is operated. However, this surface contact also causes the tooth surfaces of the meshing portions of the pinion 2 and the bull gear 4 to not contact each other in the area between the portions of the contact surface closest to the center c in the tooth width direction but form the gap 6. As described above, in the present embodiment, the pinion gear 2 and the large gear 4 can be brought into contact with each other at the meshing portion except for the cutting end portions 5 at both end portions in the width direction of the tooth surfaces, and therefore, even if the pinion gear 2 and the large gear 4 are deflected at the tooth top portions due to high-load high-speed rotation, the thrust performance can be sufficiently ensured to prevent one end of the tooth surfaces from coming into contact. Therefore, the tooth is not broken, dented, or the like due to contact of one end of the tooth surface. In addition, the meshing ratio between the pinion gear 2 and the large gear 4 can be increased so that noise can be reduced as compared with the case of convexity processing.
For example, the cutting end portion 5 may be formed by cutting a portion from a portion contacting the tooth surface of the pinion gear 2 to a tooth end in the width direction at the tooth surface of the large gear 4. The truncated portion 5 is also a portion corresponding to: the large gear 4 is easily quenched by carbon-impregnated quenching performed at the time of manufacturing, and has higher brittleness than other portions. The less fragile portion of the teeth of the large gear 4 can be removed by the cutting end, and therefore the cutting end 5 does not participate in the meshing of the small gear 2 and the large gear 4. This is advantageous in preventing breakage, dent, etc. of the teeth of the pinion 2 and the large gear 4 when the motor is operated.
Above with reference to the drawingsThe embodiments of the present invention have been described, but the present invention is not limited to these. The portions other than the pinion gear 2 and the bull gear 4 include conventionally known structures, and various structures may be employed. In the above embodiment, the end portion 5 is provided on the large gear 4, but the end portion 5 may be provided on the small gear 2. The diameter, the number of teeth, and the radius of curvature r of the pitch circles of the pinion 2 and the bull gear 4 1 、r 2 The specific numerical value of (c) and the like are not particularly limited.
Description of the reference numerals
2 … pinion, 21 … toothed bar, 22 … busbar, 3 … axle, 4 … bull gear, 41 … toothed bar, 42 … busbar, 5 … truncated end, θ 1 、θ 2 … torsion angle, r 1 … radius of curvature, r, of the tooth trace 21 2 … radius of curvature of the tooth trace 41, c … width direction center.
Claims (1)
1. A gear device for a railway vehicle is provided with: a pinion gear coupled to an output shaft of the drive source; and a large gear engaged with the small gear and connected with the axle, characterized in that,
the pinion and the bull gear are each composed of an arc gear whose tooth trace as the intersection line of the tooth face and the pitch circle cylinder is arc-shaped having zero torsion angle with respect to the generatrix of the pitch circle cylinder at the center in the tooth width direction,
the radius of curvature of the pinion's profile is greater than the radius of curvature of the bull's profile,
the cutting end portions are provided at both end portions in the width direction of the tooth surface of one of the pinion gear and the bull gear so as not to contact the tooth surface of the other of the pinion gear and the bull gear.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/009421 WO2020183536A1 (en) | 2019-03-08 | 2019-03-08 | Rail car gear device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113490805A CN113490805A (en) | 2021-10-08 |
| CN113490805B true CN113490805B (en) | 2023-11-07 |
Family
ID=72427314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980091700.7A Active CN113490805B (en) | 2019-03-08 | 2019-03-08 | Gear device for railway vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7273137B2 (en) |
| CN (1) | CN113490805B (en) |
| WO (1) | WO2020183536A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060343A (en) * | 1991-10-24 | 1992-04-15 | 太原工业大学 | Bidirectional circular-arc gear |
| JP2010209968A (en) * | 2009-03-09 | 2010-09-24 | Honda Motor Co Ltd | Worm wheel and method for manufacturing the same |
| CN105452731A (en) * | 2013-08-02 | 2016-03-30 | 东洋电机制造株式会社 | Railway car gearing of parallel cardan drive format |
| CN205824096U (en) * | 2016-07-20 | 2016-12-21 | 方年学 | Curved tooth line point-line meshing gear |
-
2019
- 2019-03-08 JP JP2021504622A patent/JP7273137B2/en active Active
- 2019-03-08 CN CN201980091700.7A patent/CN113490805B/en active Active
- 2019-03-08 WO PCT/JP2019/009421 patent/WO2020183536A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060343A (en) * | 1991-10-24 | 1992-04-15 | 太原工业大学 | Bidirectional circular-arc gear |
| JP2010209968A (en) * | 2009-03-09 | 2010-09-24 | Honda Motor Co Ltd | Worm wheel and method for manufacturing the same |
| CN105452731A (en) * | 2013-08-02 | 2016-03-30 | 东洋电机制造株式会社 | Railway car gearing of parallel cardan drive format |
| CN205824096U (en) * | 2016-07-20 | 2016-12-21 | 方年学 | Curved tooth line point-line meshing gear |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020183536A1 (en) | 2020-09-17 |
| JP7273137B2 (en) | 2023-05-12 |
| CN113490805A (en) | 2021-10-08 |
| JPWO2020183536A1 (en) | 2020-09-17 |
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