CN108547937B - Gear transmission system and low-floor light rail vehicle - Google Patents
Gear transmission system and low-floor light rail vehicle Download PDFInfo
- Publication number
- CN108547937B CN108547937B CN201810747432.7A CN201810747432A CN108547937B CN 108547937 B CN108547937 B CN 108547937B CN 201810747432 A CN201810747432 A CN 201810747432A CN 108547937 B CN108547937 B CN 108547937B
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- Prior art keywords
- sealing
- cover
- shaft
- gear
- gear box
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 119
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 26
- 230000000903 blocking effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000003921 oil Substances 0.000 abstract description 17
- 239000010687 lubricating oil Substances 0.000 abstract description 11
- 230000013011 mating Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005276 aerator Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Classifications
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- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
- B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Details Of Gearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to the technical field of transmission parts, and provides a gear transmission system and a low-floor light rail vehicle. The gear transmission system provided by the invention is provided with a second sealing mechanism between the output shaft and the gear box body. The second sealing mechanism comprises a first bearing seat, a sealing ring, a first sealing end cover, a sealing inner cover, a multifunctional cover and a first V-shaped ring, wherein the first bearing seat, the sealing ring and the sealing inner cover are formed with a waterproof labyrinth and a backwater cavity for preventing water from entering the gear box body and causing lubricating oil to be emulsified; the first sealing end cover, the sealing inner cover and the multifunctional cover are provided with a leakage-proof labyrinth preventing lubricating oil leakage and an oil return cavity; meanwhile, the waterproof labyrinth and the leakage-proof labyrinth are isolated by the first V-shaped ring, so that the problems that water enters the gear box body and lubricating oil leaks are further prevented, and the use requirement of the low-floor light rail vehicle is met.
Description
Technical Field
The invention relates to the technical field of transmission, in particular to a gear transmission system and a low-floor light rail vehicle.
Background
The low-floor light rail vehicle is a common rail traffic running mode, the gear box is a key component of the low-floor light rail vehicle, and plays a role in transmitting motor torque and rotating speed and driving wheels, and the low-floor light rail vehicle is generally transmitted by a vertical shaft and is a two-stage spiral bevel gear transmission system structure. The 100% low floor light rail car bogie is of a great variety, which eliminates the traditional axle and adopts a mode of directly connecting a gear box with wheels for transmission. The connection between the gear box and the wheels is stable and reliable, and is convenient to disassemble, assemble and inspect.
The low-floor light rail vehicle runs on the ground, and is frequently subjected to weather such as rain and snow, so that the lubricating oil of the gear box is easy to emulsify, and the requirement on the sealing waterproof performance of the gear box is high. The existing labyrinth seal structure of the gearbox cannot meet the requirement, and the existing problem can be solved by adopting a combined sealing mode which can prevent internal lubricating oil from overflowing and external water from entering the gearbox.
Disclosure of Invention
It is an object of the present invention to provide a gear system that ameliorates the above-mentioned problems of the prior art and meets the use requirements of low floor light rail vehicles.
It is a further object of the present invention to provide a low floor railcar including the above gear system.
Embodiments of the present invention are implemented as follows:
a gear transmission system comprising a gear housing, an input shaft and an output shaft; the input shaft is in transmission connection with the output shaft and is respectively arranged on the gear box body; a second sealing mechanism is arranged between the output shaft and the gear box body;
the second sealing mechanism comprises a first bearing seat, a sealing ring, a first sealing end cover, a sealing inner cover, a multifunctional cover and a first V-shaped ring; the first bearing seat is fixedly connected with the gear box body; the sealing ring is arranged between the first bearing seat and the output shaft; the sealing inner cover is fixedly connected to the first bearing seat; the first bearing seat, the sealing ring and the sealing inner cover jointly form a leakage-proof labyrinth and an oil return cavity communicated with the leakage-proof labyrinth;
the multifunctional cover is sleeved outside the output shaft and is fixedly connected with the output shaft; the first sealing end cover is sleeved outside the multifunctional cover and fixedly connected with the sealing inner cover; the first sealing end cover, the sealing inner cover and the multifunctional cover form a waterproof labyrinth together, and a water return cavity communicated with the waterproof labyrinth;
the first V-shaped ring is arranged between the sealing inner cover and the multifunctional cover and is used for isolating the leakage-proof labyrinth from the waterproof labyrinth.
In one embodiment of the invention:
the multifunctional cover comprises a first matching part, a second matching part and a third matching part which are sequentially connected along the axial direction, wherein the radial dimension of the second matching part is larger than that of the first matching part, and the radial dimension of the first matching part is larger than that of the third matching part; the outer peripheral surface of the second matching part is provided with a waterproof bulge; a first bulge is arranged on the first end surface of the sealing inner cover;
the end face of the waterproof bulge is in close fit with the end face of the first bulge, and the inner peripheral face of the first bulge is in close fit with the outer peripheral face of the second fit part, so that a waterproof labyrinth is formed.
In one embodiment of the invention:
the sealing inner cover is provided with a second end surface opposite to the first end surface, and a second bulge is arranged on the second end surface; the seal ring includes a third protrusion extending axially outwardly and a fourth protrusion extending axially inwardly; the inner peripheral surface of the second bulge is in close fit with the outer peripheral surface of the third fit part, the inner end surface of the second bulge is in close fit with the outer end surface of the sealing ring, the outer peripheral surface of the second bulge is in close fit with the inner peripheral surface of the third bulge, and the end surface of the third bulge is in close fit with the second end surface to form a leakage-proof labyrinth.
In one embodiment of the invention:
the output shaft comprises a hollow shaft and an inner shaft arranged in the hollow shaft; the hollow shaft is internally provided with a conical hole, and the outer peripheral surface of the inner shaft is a conical surface with the conical degree matched with the conical hole; the inner shaft is in interference fit with the tapered hole through the tapered surface and is used for fixedly connecting the inner shaft in the hollow shaft.
In one embodiment of the invention:
the inner end face of the multifunctional cover is provided with a first groove, and the inner surface of the first groove is matched with the outer surface of the hollow shaft; a second V-shaped ring is arranged between the inner peripheral surface of the multifunctional cover and the outer peripheral surface of the inner shaft, and a gap seal is formed between the outer peripheral surface of the second V-shaped ring and the inner peripheral surface of the multifunctional cover; the inner end surface of the second V-shaped ring is abutted with the outer end surface of the hollow shaft.
In one embodiment of the invention:
the hollow shaft is also provided with a cylindrical hole coaxially arranged with the conical hole, and the inner shaft is provided with a cylindrical shaft matched with the cylindrical hole; one end of the cylindrical hole far away from the conical hole is sealed by a baffle cover, and the baffle cover is fixedly connected with the hollow shaft.
In one embodiment of the invention:
the gear box body comprises a gear box body and a gear box cover, and the gear box body is detachably connected with the gear box cover; the gear box cover is arranged at one end of the output shaft far away from the second sealing mechanism.
In one embodiment of the invention:
the gear box cover is provided with a first mounting hole, and the position of the first mounting hole corresponds to the position of the output shaft; and a second sealing end cover is arranged at the first mounting hole and is detachably connected with the gear box cover.
In one embodiment of the invention:
the gear transmission system further comprises an intermediate shaft; the axis of the input shaft is vertical to the intermediate shaft, and the input shaft is in transmission connection with the intermediate shaft through a spiral bevel gear pair; the axis of the intermediate shaft is parallel to the axis of the output shaft, and the intermediate shaft is in transmission connection with the output shaft through a secondary gear pair.
A low floor railcar comprising the gear train described above.
The beneficial effects of the embodiment of the invention include:
embodiments of the present invention provide a gear drive system that includes a gear housing, an input shaft, and an output shaft. The input shaft and the output shaft are in transmission connection in the gear box body, and a second sealing mechanism is arranged between the output shaft and the gear box body. The second sealing mechanism is located at one end of the output shaft close to the wheel, so that the sealing performance of the second sealing mechanism is particularly important. The second sealing mechanism comprises a first bearing seat, a sealing ring, a first sealing end cover, a sealing inner cover, a multifunctional cover and a first V-shaped ring, wherein the first bearing seat, the sealing ring and the sealing inner cover are formed with a waterproof labyrinth and a backwater cavity for preventing water from entering the gear box body and causing lubricating oil to be emulsified; the first sealing end cover, the sealing inner cover and the multifunctional cover are provided with a leakage-proof labyrinth preventing lubricating oil leakage and an oil return cavity; meanwhile, the waterproof labyrinth and the leakage-proof labyrinth are isolated by the first V-shaped ring, so that the problems that water enters the gear box body and lubricating oil leaks are further prevented, and the use requirement of the low-floor light rail vehicle is met.
The low-floor light rail vehicle provided by the embodiment of the invention comprises the gear transmission system, so that the low-floor light rail vehicle has the beneficial effects of preventing water or oil leakage of a gear box body and meeting the use requirements.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the overall structure of a gear system according to embodiment 1 of the present invention at a first view angle;
FIG. 2 is a schematic cross-sectional view of the structure at II-II in FIG. 1;
fig. 3 is a schematic diagram of the overall structure of the gear system according to embodiment 1 of the present invention at a second view angle;
FIG. 4 is a schematic view of a partial enlarged structure at IV in FIG. 2;
fig. 5 is a schematic view of a partial enlarged structure at v in fig. 2;
fig. 6 is a schematic structural diagram of a multifunctional cover in the gear transmission system according to embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a sealing inner cover in the gear transmission system according to embodiment 1 of the present invention;
fig. 8 is a schematic structural diagram of a first bearing seat in the gear transmission system according to embodiment 1 of the present invention;
FIG. 9 is a schematic structural view of a seal ring in a gear system according to embodiment 1 of the present invention;
fig. 10 is a schematic diagram of a partial structure of a gear system according to embodiment 2 of the present invention.
Icon: 010-a gear transmission system; 100-gear housing; 110-a gearbox body; 111-lifting lugs; 112-boom; 113-a viewing window; 114-oiling bolts; 115-oil drain bolts; 120-gear box cover; 121-an aerator; 122-oil level window; 200-an input shaft; 210-a first sealing mechanism; 220-a second bearing block; 230-spacer rings; 240-axial retainer ring; 250-driving spiral bevel gear; 261-first cylindrical roller bearing; 262-a second cylindrical roller bearing; 263-ball bearing; 300-intermediate shaft; 310-sleeve; 320-driven spiral bevel gear; 330-driving cylindrical helical gear; 340-a third bearing seat; 350-a third seal end cap; 360-fourth seal end cap; 400-output shaft; 410-hollow shaft; 411-conical hole; 412-a cylindrical bore; 413-a cover; 414-fourth bearing mount; 415-a second seal end cap; 416-driven cylindrical helical gear; 420-an inner shaft; 500-a second sealing mechanism; 510-a first bearing seat; 511-a third groove; 520-sealing ring; 521-third protrusions; 522-fourth protrusions; 530—a first seal end cap; 540-sealing the inner cap; 541-a first end face; 542-a second end face; 543-second groove; 544-first protrusions; 545-second bump; 550-a multifunctional cover; 551-first mating portion; 552-a second mating portion; 553-a third mating portion; 554-waterproof protrusions; 555-first groove; 556-second V-ring; 557-sealing groove; 560-first V-ring; 571-an oil return chamber; 572-water return cavity; 600-wheels.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, 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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In describing embodiments of the present invention, it should be noted that the terms "first," "second," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Example 1
Fig. 1 is a schematic diagram of the overall structure of the gear system 010 according to the present embodiment at a first view angle, and fig. 2 is a schematic diagram of the cross-sectional structure at ii-ii in fig. 2. Referring to fig. 1 and 2 in combination, the present embodiment provides a gear transmission system 010, which includes a gear housing 100, an input shaft 200 and an output shaft 400, and a second sealing mechanism 500 is disposed between the output shaft 400 and the gear housing 100. The second sealing mechanism 500 includes a first bearing housing 510, a sealing ring 520, a first sealing end cap 530, a sealing inner cap 540, a multi-functional cap 550, and a first V-ring 560. The first bearing seat 510, the sealing ring 520, the first sealing end cover 530, the sealing inner cover 540, the multifunctional cover 550 and the first V-shaped ring 560 are all sleeved outside the output shaft 400, the first bearing seat 510 is fixedly connected to the gear box body 100, the sealing inner cover 540 is fixedly connected to the first bearing seat 510, and the first sealing end cover 530 is fixedly connected to the sealing inner cover 540. The seal ring 520 is disposed between the first bearing housing 510 and the output shaft 400, and forms a leakage preventing labyrinth together with the first bearing housing 510 and the seal inner cover 540, and an oil return chamber 571 communicating with the leakage preventing labyrinth. The multifunctional cover 550 is fixedly connected with the output shaft 400 and is positioned between the first sealing end cover 530 and the output shaft 400, and the multifunctional cover 550, the first sealing end cover 530 and the sealing inner cover 540 together form a waterproof labyrinth and a backwater cavity 572 communicated with the waterproof labyrinth. The first V-ring 560 is provided between the sealing inner cap 540 and the multifunctional cap 550 to completely isolate the leakage preventing labyrinth and the waterproof labyrinth. The lubrication oil is sealed in the gear box under the combined action of the non-contact seal of the leakage prevention labyrinth and the contact seal of the first V-shaped ring 560; water cannot enter the gear housing 100 under the combined action of the non-contact seal of the waterproof labyrinth and the contact seal of the first V-ring 560, thereby avoiding the problem of lubrication oil emulsification. In this embodiment, the V-shaped ring is a seal ring having a V-shaped cross section.
The gear train 010 provided in this embodiment is further described below:
fig. 3 is a schematic diagram of the overall structure of the gear system 010 according to the present embodiment in a second view angle. Referring to fig. 1 and 3 in combination, in the present embodiment, the gear housing 100 includes a gear housing body 110 and a gear box cover 120 that are connected to each other, the gear housing body 110 and the gear box cover 120 adopt vertical type split boxes, and the gear box cover 120 is disposed at an end of the output shaft 400 away from the second sealing mechanism 500, i.e. an end away from the wheel 600. The two ends of the gear box body 110 are respectively provided with a lifting lug 111 and a lifting rod 112, and the gear box is connected with the bogie through the lifting rod 112 arranged on the gear box body 110 when in use. An observation window 113 is formed at the top of the gear case body 110, and the engagement of the transmission gear and the flow of the lubricant in the gear case body 100 can be observed through the observation window 113. The gear box is also provided with accessories such as a refueling bolt 114, a drain bolt 115 and the like, and the refueling bolt 114 is positioned at the upper part of the drain bolt 115. The gear case cover 120 is provided with a breather 121 and an oil level window 122.
Fig. 4 is a schematic view of a partial enlarged structure at iv in fig. 2. Referring to fig. 2 and 4 in combination, in the present embodiment, in order to make the structure of the gear train 010 more compact, the input shaft 200 is disposed along the advancing direction of the locomotive, that is, the axis of the input shaft 200 is arranged perpendicular to the axis of the output shaft 400. Specifically, a second bearing seat 220 is disposed at a connection portion between the input shaft 200 and the gear box body 110, two tapered roller bearings disposed back-to-back are disposed between the second bearing seat 220 and the input shaft 200, and the two tapered roller bearings are sleeved on the input shaft 200 through interference fit. A spacer ring 230 is arranged between the two tapered roller bearings, and the spacer ring 230 is in clearance fit with the input shaft 200 and is used for adjusting bearing play. Meanwhile, an axial retainer ring 240 is further arranged on the outer side of the tapered roller bearing, the axial retainer ring 240 is fixedly connected to the input shaft 200 through a locking bolt, and the tapered roller bearing is prevented from axially moving, so that the tapered roller bearing is axially positioned. The first sealing mechanism 210 is disposed between the second bearing housing 220 and the axial retainer 240. In the present embodiment, the first sealing mechanism 210 is a mechanical labyrinth structure with non-contact sealing, and it is understood that in other embodiments, other sealing structures may be selected as the first sealing mechanism 210 according to the requirement of the user, for example, a contact sealing structure with a dust ring. In the present embodiment, the back of the tapered roller bearing is the side with the smaller distance between the tapered rollers.
With continued reference to fig. 2, in the present embodiment, the gear system 010 further includes an intermediate shaft 300, the input shaft 200 is in transmission connection with the intermediate shaft 300 through a primary gear pair, and the output shaft 400 is in transmission connection with the intermediate shaft 300 through a secondary gear pair. In use, power from the motor is transmitted by the input shaft 200 to the output shaft 400 via the intermediate shaft 300, and finally the locomotive is driven in motion by the wheels 600 attached to the output shaft 400. Specifically, the primary gear pair is a spiral bevel gear pair, and the axis of the input shaft 200 is perpendicular to the axis of the intermediate shaft 300. The driving spiral bevel gear 250 is arranged at the shaft end of the input shaft 200 and is in an integrated structure with the input shaft 200; the intermediate shaft 300 is provided with a sleeve 310 in interference fit connection with the intermediate shaft 300, a driven spiral bevel gear 320 is fixedly connected to the sleeve 310 through a bolt, and is in transmission with the intermediate shaft 300 through the sleeve 310; the driving bevel gear 250 meshes with the driven bevel gear 320 to transmit power from the input shaft 200 to the intermediate shaft 300. It should be noted that, in the present embodiment, the driven bevel gear 320 is connected to the intermediate shaft 300 through the sleeve 310, and it is understood that, in other embodiments, the driven bevel gear 320 may be directly connected to the intermediate shaft 300 through an interference fit connection according to the requirement of the user.
Further, a second mounting hole and a third mounting hole are respectively formed along two ends of the axis of the intermediate shaft 300, specifically, the second mounting hole is formed on the gear box cover 120, and the third mounting hole is formed on the gear box body 110. A third bearing seat 340 is arranged at the second mounting hole, and a tapered roller bearing is arranged between the third bearing seat 340 and the intermediate shaft 300; a tapered roller bearing is also arranged at the third mounting hole; the two tapered roller bearings are sleeved on the intermediate shaft 300 through interference fit, and the backs of the two tapered roller bearings face the outer side of the gear box body 100. Meanwhile, the second mounting hole is provided with a third sealing end cap 350, the third sealing end cap 350 is detachably connected to the gear case cover 120 through bolts, a fourth sealing end cap 360 is provided at the third mounting hole, and the fourth sealing end cap 360 is detachably connected to the gear case body 110 through bolts, thereby sealing the intermediate shaft 300 in the gear case body 100. The mounting surfaces of the third seal end cover 350 and the fourth seal end cover 360 are respectively smeared with sealant to form contact type seal
The secondary gear pair is a cylindrical bevel gear pair, and the axis of the intermediate shaft 300 is parallel to the axis of the output shaft 400. The driving cylindrical helical gear 330 is arranged on the intermediate shaft 300; the driven cylindrical helical gear 416 is fixedly connected to the vinegar Hu Zhou through bolts; the driving helical gear 330 meshes with the driven helical gear 416 to transfer power from the intermediate shaft 300 to the output shaft 400. In the present embodiment, the output shaft 400 includes a hollow shaft 410 and an inner shaft 420 disposed within the hollow shaft 410, the inner shaft 420 being disposed at an end outside the hollow shaft 410 for connection with the wheel 600, and the driven cylindrical helical gear 416 being fixedly coupled to the hollow shaft 410. The hollow shaft 410 is provided with a tapered hole 411 therein, the outer circumferential surface of the inner shaft 420 is provided with a tapered surface matched with the tapered hole 411, and the inner shaft 420 is fixed in the hollow shaft 410 through interference fit of the tapered surface and the tapered hole, so that power is transmitted from the hollow shaft 410 to the inner shaft 420, and finally the wheel 600 is driven to rotate.
Further, a cylindrical hole 412 coaxially disposed with the tapered hole 411 is further disposed in the hollow shaft 410, and the cylindrical hole 412 is in communication with the tapered hole 411, so that the hollow shaft 410 forms a hollow structure. The inner shaft 420 is provided with a cylindrical shaft which is matched with the cylindrical hole 412, and when the cylindrical shaft is installed, the cylindrical shaft stretches into the cylindrical hole 412 to realize the coaxial positioning of the inner shaft 420 and the hollow shaft 410.
Further, a blocking cover 413 is disposed at one end of the cylindrical hole 412 away from the conical hole 411, and the blocking cover 413 is fixedly connected to the hollow shaft 410 through a bolt, so that one end of the cylindrical hole 412 away from the conical hole 411 is sealed, and sealing in the gear housing 100 is achieved.
Further, the gear box cover 120 is provided with a first mounting hole, the position of which corresponds to the output shaft 400, and in this embodiment, the axis of the first mounting hole coincides with the axis of the output shaft 400. A first bearing seat 510 is arranged between the hollow shaft 410 and the gear box body 110, and a tapered roller bearing is arranged between the first bearing seat 510 and the gear box cover 120; a fourth bearing seat 414 is arranged between the hollow shaft 410 and the gear box cover 120, and a tapered roller bearing is arranged between the fourth bearing seat 414 and the hollow shaft 410; the backs of both tapered roller bearings are disposed toward the outside of the gear housing 100. A second seal end cap 415 is fixedly coupled to the fourth bearing housing 414 to seal an end of the output shaft 400 remote from the wheel 600 within the gear housing 100. The second seal end cap 415 has a sealant applied to its mounting surface to form a contact seal.
Fig. 5 is a schematic view of a partial enlarged structure at v in fig. 2. Referring to fig. 2 and 5 in combination, in the present embodiment, a second sealing mechanism 500 is disposed between the hollow shaft 410 and the gear case body 110, and the second sealing mechanism 500 includes a first bearing seat 510, a sealing ring 520, a first sealing end cap 530, a sealing inner cap 540, a multifunctional cap 550, and a first V-shaped ring 560. The first bearing housing 510 is fixedly connected to the gear housing 100, the sealing inner cover 540 and the first sealing end cap 530 are sequentially and fixedly connected to the first bearing housing 510 along an axially outward direction of the output shaft 400, and a sealant is smeared on a mounting surface of the first sealing end cap 530 to form a contact seal.
Fig. 6 is a schematic structural diagram of a multifunctional cover 550 in the gear system 010 according to the present embodiment. Referring to fig. 5 and 6 in combination, in the present embodiment, the multifunctional lid 550 is formed by a first mating portion 551, a second mating portion 552 and a third mating portion 553 that are sequentially connected along an axial direction, a radial dimension of the second mating portion 552 is greater than a radial dimension of the first mating portion 551, a radial dimension of the first mating portion 551 is greater than a radial dimension of the third mating portion 553, and at the same time, a waterproof protrusion 554 extending radially outward is further provided on the second mating portion 552, and a distance between both side end surfaces of the waterproof protrusion 554 in a radially outward direction is gradually reduced. The end surface of the third fitting portion 553 is provided with a first groove 555 extending along the axial direction, the inner surface of the first groove 555 is fitted with the outer surface of the hollow shaft 410, and the bottom surface of the first groove 555 is abutted with the outer end surface of the hollow shaft 410. The connection bolt passes through the multifunctional cover 550 and is screwed on the hollow shaft 410, thereby fixedly connecting the multifunctional cover 550 to the hollow shaft 410.
Further, a second V-shaped ring 556 is arranged between the inner peripheral surface of the multifunctional cover 550 and the outer peripheral surface of the inner shaft 420, and the inner end surface of the second V-shaped ring 556 is abutted against the outer end surface of the hollow shaft 410 to form contact seal; a gap exists between the outer circumferential surface of the second V-shaped ring 556 and the inner circumferential surface of the multifunctional cover 550, thereby forming a small gap seal, forming resistance to external water, and preventing the problem of rust of the hollow shaft 410 and the inner shaft 420 due to entry of a large amount of water.
Fig. 7 is a schematic structural diagram of a sealing inner cover 540 in the gear system 010 according to the present embodiment. Referring to fig. 5-7 in combination, in the present embodiment, the sealing inner cover 540 is provided with a second groove 543, an inner bottom surface of the second groove 543 is a first end surface 541 of the sealing inner cover 540, and an inner end surface of the sealing inner cover 540 opposite to the first end surface 541 is a second end surface 542 of the sealing inner cover 540. The first end face 541 is provided with a first protrusion 544, and the peripheral surface of the second groove 543, the first end face 541, the first protrusion 544, the multifunctional cover 550, and the first seal end cap 530 enclose a water return cavity 572 together, and a drain hole (not shown) is provided at a position of the water return cavity 572 near the ground when the water return cavity 572 is in use. Water entering between the multifunctional cover 550 and the first sealing cap 530 is collected in the return water chamber 572 and discharged through the drain hole. The outer end surface of the first protrusion 544 is provided with a slope matched with the end surface of the waterproof protrusion 554, the slope is in close fit with the waterproof protrusion 554, the inner circumferential surface of the first protrusion 544 is in close fit with the outer circumferential surface of the second matching part 552, a waterproof labyrinth is formed, and part of water is prevented from splashing into the gear case 100 under the driving of the rotation of the output shaft 400.
Further, a seal groove 557 is formed in the inner end surface of the second mating portion 552, the first V-shaped ring 560 is disposed in the seal groove 557, and two ends of the first V-shaped ring 560 are respectively abutted against the bottom of the seal groove 557 and the first end surface 541, so as to form a contact seal, and thoroughly prevent impurities such as water from entering the gear case 100.
Fig. 8 is a schematic structural diagram of a first bearing seat 510 in the gear transmission system 010 according to the present embodiment, and fig. 9 is a schematic structural diagram of a seal ring 520 in the gear transmission system 010 according to the present embodiment. Referring to fig. 5, 8 and 9, in the present embodiment, a second protrusion 545 extending inward in the axial direction is disposed on a second end surface 542 of the inner sealing cover 540, and a third protrusion 521 and a fourth protrusion 522 extending at two ends in the axial direction are disposed on two sides of the sealing ring 520, respectively, and the second protrusion 545 is sandwiched between the third protrusion 521 and the third mating portion 553. The first bearing seat 510 is provided with a third groove 511, and the third groove 511, the outer circumferential surface of the third protrusion 521, and the second end surface 542 enclose an oil return cavity 571. An oil return hole is provided in the oil return chamber 571 for guiding the lubricating oil that has entered the oil return chamber 571 back into the gear housing 100. The inner circumferential surface of the second protrusion 545 is closely fitted to the outer circumferential surface of the third fitting portion 553, the inner end surface of the second protrusion 545 is closely fitted to the outer end surface of the seal ring 520, the outer circumferential surface of the second protrusion 545 is closely fitted to the inner circumferential surface of the third protrusion 521, and the outer end surface of the third protrusion 521 is closely fitted to the second end surface 542, forming a leak-proof labyrinth. Moreover, since the first V-shaped ring 560 is disposed between the second fitting portion 552 and the first end face 541, the waterproof labyrinth and the leakage-proof labyrinth are isolated, and water entering the waterproof labyrinth cannot enter the leakage-proof labyrinth through the first V-shaped ring 560, thereby avoiding emulsification of the lubricating oil in the gear housing 100; the lubricant entering the leakage preventing labyrinth cannot enter the waterproof labyrinth through the first V-ring 560, thereby preventing the lubricant from leaking. Further, the fourth protrusion 522 is sandwiched between the first bearing housing 510 and the hollow shaft 410, and the outer circumferential surface of the fourth protrusion 522 forms a small clearance fit with the inner circumferential surface of the first bearing housing 510.
In the gear transmission system 010 provided in the embodiment of the invention, the gear box body 100 comprises the gear box body 110 and the gear box cover 120 which are vertically divided, and the gear box cover 120 is fixedly connected with the gear box body 110 through bolts, so that the assembly and the disassembly are convenient, and the maintenance is simple. By providing the first sealing mechanism 210 and the second sealing mechanism 500, the sealing of the gear housing 100 is fully ensured, the problem of lubricating oil emulsification is solved, and the sealing requirement of the low-floor light rail vehicle is met. By arranging the components in the gear train 010, a reasonable oil path is formed, ensuring that the lubrication oil is able to lubricate the components within the gear housing 100. The gear transmission system 010 provided by the embodiment of the invention has the advantages of compact structure, convenient disassembly and good sealing waterproof performance, and fully meets the use requirements.
Embodiments of the present invention also provide a low floor railcar (not shown) that includes the above-described gear train 010. Because this low floor light rail car includes foretell gear train 010, consequently also have compact structure, dismantle convenient, sealed waterproof performance good, can fully satisfy the beneficial effect of user demand.
Example 2
This embodiment also provides a gear system 010 which is substantially the same as the gear system 010 provided in embodiment 1, except that the description is not repeated, except that the structure of the connection between the input shaft 200 and the gear case body 110 is different.
Fig. 10 is a schematic partial structure of the gear train 010 according to the present embodiment. Referring to fig. 10, in the present embodiment, two cylindrical roller bearings and a four-point ball bearing 263 are disposed between the input shaft 200 and the second bearing housing 220. The two cylindrical roller bearings are a first cylindrical roller bearing 261 and a second cylindrical roller bearing 262, respectively. The first cylindrical roller bearing 261, the ball bearing 263, and the second cylindrical roller bearing 262 are disposed in this order along the axial direction of the input shaft 200, and gradually come close to the drive spiral bevel gear 250. A spacer ring 230 is arranged between the first cylindrical roller bearing 261 and the ball bearing 263, and between the second cylindrical roller bearing 262 and the ball bearing 263, and the spacer ring 230 is in clearance fit with the input shaft 200 for adjusting bearing play.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A gear transmission system, comprising:
a gear housing, an input shaft and an output shaft; the input shaft is in transmission connection with the output shaft and is respectively arranged in the gear box body, and a second sealing mechanism is arranged between the output shaft and the gear box body;
the second sealing mechanism comprises a first bearing seat, a sealing ring, a first sealing end cover, a sealing inner cover, a multifunctional cover and a first V-shaped ring; the first bearing seat is fixedly connected with the gear box body; the sealing ring is arranged between the first bearing seat and the output shaft; the sealing inner cover is fixedly connected to the first bearing seat; the first bearing seat, the sealing ring and the sealing inner cover jointly form a leakage-proof labyrinth and an oil return cavity communicated with the leakage-proof labyrinth;
the multifunctional cover is sleeved outside the output shaft and fixedly connected with the output shaft; the first sealing end cover is sleeved outside the multifunctional cover and fixedly connected with the sealing inner cover; the first sealing end cover, the sealing inner cover and the multifunctional cover form a waterproof labyrinth together, and a backwater cavity communicated with the waterproof labyrinth;
the first V-shaped ring is arranged between the sealing inner cover and the multifunctional cover and is used for isolating the leakage-proof labyrinth from the waterproof labyrinth;
the multifunctional cover comprises a first matching part, a second matching part and a third matching part which are sequentially connected along the axial direction, the radial dimension of the second matching part is larger than that of the first matching part, and the radial dimension of the first matching part is larger than that of the third matching part; the outer peripheral surface of the second matching part is provided with a waterproof bulge; a first bulge is arranged on the first end face of the sealing inner cover;
the end face of the waterproof bulge is in close fit with the end face of the first bulge, and the inner peripheral face of the first bulge is in close fit with the outer peripheral face of the second fit part to form the waterproof labyrinth;
a sealing groove is formed in the inner end face of the second matching part, which is axially opposite to the first matching part, the first V-shaped ring is arranged in the sealing groove, and the two axial ends of the first V-shaped ring are respectively abutted against the bottom of the sealing groove and the first end face;
the output shaft comprises a hollow shaft and an inner shaft arranged in the hollow shaft; a conical hole is formed in the hollow shaft, and the outer circumferential surface of the inner shaft is a conical surface with a taper matched with the conical hole; the inner shaft is in interference fit with the taper hole through the taper surface and is used for fixedly connecting the inner shaft in the hollow shaft;
a first groove is formed in the inner end face of the multifunctional cover, and the inner surface of the first groove is matched with the outer surface of the hollow shaft; a second V-shaped ring is arranged between the inner peripheral surface of the multifunctional cover and the outer peripheral surface of the inner shaft, and a gap seal is formed between the outer peripheral surface of the second V-shaped ring and the inner peripheral surface of the multifunctional cover; the inner end face of the second V-shaped ring is abutted with the outer end face of the hollow shaft.
2. The gear system of claim 1, wherein:
the sealing inner cover is provided with a second end face opposite to the first end face, and a second bulge is arranged on the second end face; the seal ring includes a third protrusion extending axially outward and a fourth protrusion extending axially inward; the inner peripheral surface of the second bulge is in close fit with the outer peripheral surface of the third fit part, the inner end surface of the second bulge is in close fit with the outer end surface of the sealing ring, the outer peripheral surface of the second bulge is in close fit with the inner peripheral surface of the third bulge, and the end surface of the third bulge is in close fit with the second end surface to form the leakage-proof labyrinth.
3. The gear system of claim 1, wherein:
the hollow shaft is also provided with a cylindrical hole coaxially arranged with the conical hole, and the inner shaft is provided with a cylindrical shaft matched with the cylindrical hole; the end of the cylindrical hole far away from the conical hole is sealed through a blocking cover, and the blocking cover is fixedly connected with the hollow shaft.
4. The gear system of claim 1, wherein:
the gear box body comprises a gear box body and a gear box cover, and the gear box body is detachably connected with the gear box cover; the gear box cover is arranged at one end of the output shaft far away from the second sealing mechanism.
5. The gear system of claim 4, wherein:
the gear box cover is provided with a first mounting hole, and the position of the first mounting hole corresponds to the position of the output shaft; and a second sealing end cover is arranged at the first mounting hole and is detachably connected with the gear box cover.
6. The gear system of claim 1, wherein:
the gear transmission system further comprises an intermediate shaft; the axis of the input shaft is vertical to the intermediate shaft, and the input shaft is in transmission connection with the intermediate shaft through a spiral bevel gear pair; the axis of the intermediate shaft is parallel to the axis of the output shaft, and the intermediate shaft is in transmission connection with the output shaft through a secondary gear pair.
7. A low floor railcar, characterized by:
the low floor railcar comprising the gear system of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747432.7A CN108547937B (en) | 2018-07-09 | 2018-07-09 | Gear transmission system and low-floor light rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747432.7A CN108547937B (en) | 2018-07-09 | 2018-07-09 | Gear transmission system and low-floor light rail vehicle |
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| Publication Number | Publication Date |
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| CN108547937A CN108547937A (en) | 2018-09-18 |
| CN108547937B true CN108547937B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810747432.7A Active CN108547937B (en) | 2018-07-09 | 2018-07-09 | Gear transmission system and low-floor light rail vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113187880B (en) * | 2021-05-07 | 2024-05-07 | 太原重工股份有限公司 | Sealing end cover for tilting device gear box |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200439177Y1 (en) * | 2007-01-08 | 2008-03-25 | (주)삼화감속기 | The worm gear box which has a oiltight partition wall |
| JP2010210085A (en) * | 2009-02-12 | 2010-09-24 | Nsk Ltd | Rolling bearing unit with seal ring for supporting wheel |
| CN201678270U (en) * | 2010-04-27 | 2010-12-22 | 煤炭科学研究总院上海分院 | Lubrication sealing structure of novel high-speed low resistance roller |
| CN201810755U (en) * | 2010-10-25 | 2011-04-27 | 重庆齿轮箱有限责任公司 | Marine gear box and oil seal structure thereof |
| CN202790467U (en) * | 2012-07-03 | 2013-03-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sealing structure for motor train unit gearbox |
| CN105460023A (en) * | 2015-12-25 | 2016-04-06 | 中车戚墅堰机车车辆工艺研究所有限公司 | Gearbox for low-floor railway vehicle |
| CN206682267U (en) * | 2017-03-28 | 2017-11-28 | 康为同创集团有限公司 | Gear-box labyrinth seal structure and gear-box |
| CN107588183A (en) * | 2017-09-28 | 2018-01-16 | 中车长春轨道客车股份有限公司 | A kind of gear case sealing structure |
| CN208442243U (en) * | 2018-07-09 | 2019-01-29 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of gear train assembly and low-floor light rail vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4222734B2 (en) * | 2001-01-26 | 2009-02-12 | 株式会社デンソー | Starter |
-
2018
- 2018-07-09 CN CN201810747432.7A patent/CN108547937B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200439177Y1 (en) * | 2007-01-08 | 2008-03-25 | (주)삼화감속기 | The worm gear box which has a oiltight partition wall |
| JP2010210085A (en) * | 2009-02-12 | 2010-09-24 | Nsk Ltd | Rolling bearing unit with seal ring for supporting wheel |
| CN201678270U (en) * | 2010-04-27 | 2010-12-22 | 煤炭科学研究总院上海分院 | Lubrication sealing structure of novel high-speed low resistance roller |
| CN201810755U (en) * | 2010-10-25 | 2011-04-27 | 重庆齿轮箱有限责任公司 | Marine gear box and oil seal structure thereof |
| CN202790467U (en) * | 2012-07-03 | 2013-03-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sealing structure for motor train unit gearbox |
| CN105460023A (en) * | 2015-12-25 | 2016-04-06 | 中车戚墅堰机车车辆工艺研究所有限公司 | Gearbox for low-floor railway vehicle |
| CN206682267U (en) * | 2017-03-28 | 2017-11-28 | 康为同创集团有限公司 | Gear-box labyrinth seal structure and gear-box |
| CN107588183A (en) * | 2017-09-28 | 2018-01-16 | 中车长春轨道客车股份有限公司 | A kind of gear case sealing structure |
| CN208442243U (en) * | 2018-07-09 | 2019-01-29 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of gear train assembly and low-floor light rail vehicle |
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