CN109099139B - Walking speed reducer of heavy engineering machinery - Google Patents
Walking speed reducer of heavy engineering machinery Download PDFInfo
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- CN109099139B CN109099139B CN201811186708.5A CN201811186708A CN109099139B CN 109099139 B CN109099139 B CN 109099139B CN 201811186708 A CN201811186708 A CN 201811186708A CN 109099139 B CN109099139 B CN 109099139B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000010276 construction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle 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
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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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
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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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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- 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
- F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
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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
- F16H57/08—General details of gearing of gearings with members having orbital motion
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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
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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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
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
- F16H2057/02056—Gearboxes for particular applications for vehicle transmissions for utility vehicles, e.g. tractors or agricultural machines
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a walking speed reducer of heavy engineering machinery, which comprises a primary cylindrical gear speed reducing assembly, a two-stage planetary speed reducing assembly and an outer side supporting assembly; the primary cylindrical gear speed reduction assembly comprises a connecting cover, a primary cylindrical gear and a primary cylindrical gear shaft; the two-stage planetary reduction assembly comprises a fixed connecting piece, a second-stage rotary shell, a second-stage sun gear, a second-stage planetary carrier, a second-stage annular gear and a connecting ring, a first-stage rotary shell, a gear shaft, a first-stage planetary gear, a first-stage planetary carrier and a first-stage annular gear; the outer side supporting component comprises an inner fixed connecting piece, an outer sealing plate and a limiting plate. The invention has smaller structural size under the same output power, the speed reducer and the longitudinal beam frame are connected by adopting double flanges, the structural strength and the rigidity are far superior to those of the traditional single flange cantilever type connection, the whole speed reducer is positioned in the frame, the risk of collision with stones and the like is reduced to the greatest extent, the walking trafficability is improved, and the structure is compact and the assembly and the disassembly are convenient.
Description
Technical Field
The invention belongs to the technical field of heavy engineering machinery speed reducers, and particularly relates to a walking speed reducer of heavy engineering machinery.
Background
At present, the traveling speed reducer structure of heavy engineering machinery widely adopted in the world mostly utilizes a hydraulic motor to drive an external two-stage or three-stage planetary speed reducer, and the speed reducer in the prior art is arranged on the inner side of a longitudinal beam of an ultra-large hydraulic excavator and is connected with a single flange of the longitudinal beam, and due to the fact that the size of the speed reducer is large, the speed reducer is more protruded on the longitudinal beam part, so that the problems of high protection difficulty of the speed reducer, poor traveling trafficability, high failure rate and the like are caused.
Disclosure of Invention
Aiming at the problems, the invention provides the walking speed reducer of the heavy engineering machinery, which has smaller structural size under the same output power, is connected with the longitudinal beam frame by adopting double flanges, has structural strength and rigidity superior to those of the traditional single flange cantilever type connection, is positioned in the frame, furthest reduces the risk of collision between the speed reducer and stones and the like, improves walking trafficability, has compact structure and convenient assembly and disassembly, and is particularly suitable for ultra-large hydraulic excavators.
The technical aim is achieved, and the technical effects are achieved by the following technical scheme:
a walking speed reducer of heavy engineering machinery comprises a first-stage cylindrical gear speed reducing assembly and a second-stage planetary speed reducing assembly which are sequentially arranged; the two-stage planetary reduction assembly comprises a gear shaft, wherein the gear shaft penetrates through the two-stage planetary reduction assembly, and one end of the gear shaft is connected with the output end of the one-stage cylindrical gear reduction assembly; the method is characterized in that: also included is a lateral support assembly;
the outer side supporting component comprises a primary rotating shell, an inner fixed connecting piece, a third limiting plate and an outer sealing plate;
the first-stage rotary shell is of a cavity structure, one end of the first-stage rotary shell is provided with a mounting hole, and the mounting hole is connected with one end, far away from the first-stage cylindrical gear reduction assembly, of the two-stage planetary reduction assembly;
the inner fixed connecting piece is arranged in the primary rotary shell and is arranged in a mounting hole on the primary rotary shell through a seventh bearing radially surrounding the outer side of the inner fixed connecting piece;
one side of the third limiting plate is connected with the other end of the gear shaft, and the other side of the third limiting plate is connected with one side of the inner fixed connecting piece and is used for axially limiting the gear shaft;
the outer sealing plate is fixedly connected with the inner fixed connecting piece.
Preferably, the primary cylindrical gear reduction assembly comprises: the connecting cover is provided with a bearing seat ring, a primary cylindrical gear and a primary cylindrical gear shaft which are arranged in the connecting cover;
the bearing seat ring is connected with the inner wall of the connecting cover;
the first-stage cylindrical gear shaft is arranged on the connecting cover through a third bearing and a fourth bearing which are oppositely arranged;
the primary cylindrical gear is arranged on the bearing seat ring and the two-stage planetary reduction assembly through a first bearing and a second bearing which are oppositely arranged, and is meshed with the external teeth of the primary cylindrical gear shaft;
the hub of the primary cylindrical gear is provided with an internal spline, and the internal spline is used as the output of the primary cylindrical gear speed reduction assembly.
Preferably, the two-stage planetary reduction assembly comprises a two-stage planetary reduction assembly and a one-stage planetary reduction assembly which are sequentially connected; the input end of the secondary planetary reduction assembly is connected with the output end of the primary planetary reduction assembly; the input end of the primary planetary reduction assembly is connected with the output end of the primary cylindrical gear reduction assembly.
Preferably, the secondary planetary reduction assembly comprises a fixed connecting piece, a secondary rotary shell, three secondary planetary gears, a secondary sun gear, a secondary planet carrier, a secondary annular gear and a connecting ring;
one end of the fixed connecting piece is connected with the connecting cover, and an axial through hole is formed in the fixed connecting piece;
the secondary rotary shell is supported on the fixed connecting piece through a fifth bearing;
the three secondary planet gears are circumferentially and uniformly arranged on the secondary planet carrier, encircle and are externally meshed with the secondary sun gear and internally meshed with the secondary annular gear, and the centers of tooth widths are overlapped;
the secondary planet carrier is in spline connection with the fixed connecting piece;
and after the secondary annular gear and the connecting ring are connected into a whole, the secondary annular gear is arranged on the outer side of the secondary rotary shell through a flange.
Preferably, a first floating seal is adopted between the secondary rotary shell and the fixed connecting piece, and a mechanical labyrinth is formed at the same time.
Preferably, the primary planetary reduction assembly comprises a gear shaft, a primary planet carrier, three primary planet gears and a primary annular gear;
the external spline of the gear shaft is connected with the internal spline of the primary cylindrical gear, and is centered by adopting a cylindrical surface;
the three primary planetary gears are circumferentially and uniformly arranged on the primary planetary carrier, encircle and are meshed with the gear shaft, are internally meshed with the primary annular gear, and are overlapped in the center of each tooth width;
the first-stage planet carrier is connected with the second-stage planet carrier through a right-angle support, an internal spline of the first-stage planet carrier is connected with an external spline of the second-stage sun gear, and the axial direction of the first-stage planet carrier is positioned through a second limiting plate.
Preferably, the outer support assembly further comprises an outer fixed connection plate which is arranged on the outer side of the primary rotary shell and is connected with the edge of the inner fixed connection plate.
The invention has the beneficial effects that:
the walking speed reducer of the heavy engineering machinery is smaller in structural size under the same output power, the speed reducer and the longitudinal beam frame are connected through double flanges, the structural strength and the rigidity are superior to those of the traditional single-flange cantilever type connection, the whole speed reducer is positioned in the frame, the risk of collision between the speed reducer and stones and the like is reduced to the greatest extent, the walking trafficability is improved, and the walking speed reducer is compact in structure, convenient to assemble and disassemble and particularly suitable for ultra-large hydraulic excavators.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
in the figure: 1. the device comprises a fixed connecting piece, 2, a connecting cover, 3, a first-stage cylindrical gear, 4, a first bearing, 5, a second bearing, 6, a first limiting plate, 7, a bearing seat ring, 8, a first-stage cylindrical gear shaft, 9, a third bearing, 10, a fourth bearing, 11, a fifth bearing, 12, a first floating seal, 13, a second-stage rotary shell, 14, a sealing plate, 15, a second-stage sun gear, 16, a second-stage planet carrier, 17, a second-stage annular gear, 18, a driving wheel, 19, a connecting ring, 20, a first-stage annular gear, 21, a first-stage planetary gear, 22, a sixth bearing, 23, a first-stage planet carrier, 24, a first pin, 25, a second floating seal, 26, a second limiting plate, 27, an inner fixed connecting plate, 28, an outer sealing plate, 29, a third limiting plate, 30, a seventh bearing, 31, an outer fixed connecting plate, 32, a first-stage rotary shell, 33, a gear shaft, 34, a right-angle support, 35, a second pin, 36, an eighth bearing, 37, a second-stage planetary gear, 38 and a longitudinal beam frame.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a travel speed reducer for a heavy construction machine includes: the device comprises a first-stage cylindrical gear reduction assembly, a two-stage planetary reduction assembly and an outer side supporting assembly which are sequentially arranged;
the primary cylindrical gear reduction assembly includes: the connecting cover 2, the bearing seat ring 7, the primary cylindrical gear 3 and the primary cylindrical gear shaft 8; the connecting cover 2 is connected with a bearing seat ring 7 arranged in the connecting cover through bolts; the primary cylindrical gear shaft 6 is arranged on the connecting cover 2 through a third bearing 9 and a fourth bearing 10 which are oppositely arranged; the primary cylindrical gear 3 is arranged on a fixed connecting piece 1 in a bearing seat ring 7 and a secondary planetary reduction assembly through a first bearing 4 and a second bearing 5 which are oppositely arranged, and a hub of the primary cylindrical gear 3 is provided with an internal spline to be used as output of a primary cylindrical gear reduction part;
the two-stage planetary reduction assembly comprises a two-stage planetary reduction assembly and a one-stage planetary reduction assembly which are sequentially connected; the input end of the secondary planetary reduction assembly is connected with the output end of the primary planetary reduction assembly; the input end of the primary planetary reduction assembly is connected with the output end of the primary cylindrical gear reduction assembly;
in one embodiment of the present invention, the secondary planetary reduction assembly comprises: the device comprises a fixed connecting piece 1, a secondary rotary shell 13, a secondary sun gear 15, three secondary planet gears 37, a secondary planet carrier 16, a secondary annular gear 18 and a connecting ring 19; one end of the fixed connecting piece is connected with the connecting cover, and an axial through hole is formed in the fixed connecting piece; the secondary rotary housing 13 is supported above the fixed connection 1 by a fifth bearing 11; the three secondary planet gears 37 are circumferentially and uniformly arranged on the secondary planet carrier 16, encircle and are externally meshed with the secondary sun gear 15, are internally meshed with the secondary annular gear 18, and the centers of the tooth widths are overlapped; the secondary planet carrier 16 is connected with the primary planet carrier 23 through a right angle support 34, and the secondary planet carrier 16 is in spline connection with the fixed connecting piece 1; after the secondary annular gear and the connecting ring are connected into a whole, the secondary annular gear is arranged outside the secondary rotary shell through a flange; the second-stage rotary shell 13 is sealed with the fixed connecting piece 1 by adopting a first floating seal 12, and a mechanical labyrinth is arranged at the same time, so that the floating seal is prevented from being damaged by larger-particle foreign matters;
the primary planetary reduction assembly includes: gear shaft 33, three first-stage planetary gears 21, first-stage planetary carrier 23, first-stage annular gear 20; the external spline of the gear shaft 33 is connected with the internal spline of the primary cylindrical gear 3, and the cylindrical surface is adopted for centering, so that the spline pair only transmits torque and does not need to bear the axial force; the three primary planet gears 21 are circumferentially and uniformly arranged on the primary planet carrier 23, encircle and are externally meshed with the primary gear shaft 33, are internally meshed with the primary annular gear 20, and are overlapped in the center of each tooth width; the inner spline of the primary planet carrier 23 is connected with the outer spline of the secondary sun gear 15, and the axial direction of the primary planet carrier 23 is positioned through a second limiting plate 26;
the lateral support assembly includes: the first-stage rotary shell 32, the inner fixed connecting piece 27, the outer fixed connecting piece 31, the outer sealing plate 28 and the third limiting plate 29; the primary rotary housing 32 has a cavity structure, wherein one end of the primary rotary housing is provided with a mounting hole, and the mounting hole is connected with one end of the two-stage planetary reduction assembly, which is far away from the primary cylindrical gear reduction assembly; as shown in fig. 1, the end is connected with a primary annular gear in the primary planetary reduction assembly; the inner fixed connecting piece 27 is arranged in the primary rotary shell 32 and is arranged in a mounting hole on the primary rotary shell 32 through a seventh bearing 30 radially surrounding the outer side of the inner fixed connecting piece; one side of the third limiting plate 29 is connected to the other end of the gear shaft 33, and the other side is connected to one side of the inner fixed connecting member 27, so as to axially limit the gear shaft 33; preferably, the third limiting plate 29 and the outer sealing plate 28 are respectively connected with the inner fixed connecting piece 27 through inner hexagon bolts, and the outer sealing plate 28 is fixedly connected with the inner fixed connecting piece 27; the outer sealing plate 28 is used for marking relevant parameter information of the speed reducer and is connected with the inner fixing piece through screws; the first-stage rotary shell 32 and the inner fixed connecting piece 27 are sealed by adopting a second floating seal 25, and a mechanical labyrinth is arranged at the same time; the outer fixing link 31 is connected with the inner fixing link 27 by bolts.
In the invention, the secondary rotary shell 13, the secondary annular gear 17, the primary annular gear 20 and the primary rotary shell 32 form a complete rotatable shell under the connection action of bolts, and the connecting ring 19 is positioned near the installation position of the driving wheel 18, so that the rigidity and the strength of the combined shell are greatly improved; the fixed connecting piece 1, the inner fixed connecting piece 27 and the outer fixed connecting piece 31 form a double-flange structure, the centers of the fifth bearing 11 and the seventh bearing 30 of the supporting shell are positioned at the center positions of the corresponding longitudinal beam frames, the stress environment of the bearings is improved to the greatest extent, the bearing overturning moment is avoided, and the supporting rigidity is greatly improved; meanwhile, the working environments of the first floating seal 12 and the second floating seal 25 are improved, the risk of sealing failure is reduced, and the reliability of the speed reducer is improved.
The primary cylindrical gear reduction assembly is used as the part with the highest rotation angle speed and linear speed of the speed reducer, is the part with the highest fatigue damage probability, has higher maintenance probability than other positions, is separated from the primary planetary reduction assembly and the secondary planetary reduction assembly, has better integrity, can be assembled with the fixed connecting piece 1 after being independently assembled, does not need to disassemble the two-stage planetary reduction parts, and is convenient to maintain.
In a specific embodiment of the present invention, the transmission paths of the primary cylindrical gear reduction part and the secondary planetary reduction part are as follows: the primary cylindrical gear shaft 8, the primary cylindrical gear 3, the gear shaft 33, the primary planet gears 21, the primary planet carrier 23, the secondary sun gear 15, the secondary planet gears 37, the secondary gear ring 17 and the primary and secondary annular gears 20 and 17 act together to serve as output elements to output power to the driving wheels 18.
During installation, the first-stage cylindrical gear reduction assembly can be assembled as a sub-component, and then the two-stage planetary reduction assembly and the outer side supporting assembly are assembled.
The specific assembly method of the primary cylindrical gear reduction assembly comprises the following steps:
the first bearing 4 and the second bearing 5 are arranged on the hub of the primary cylindrical gear 3;
bolts the bearing ring 7 to the connection housing 2;
after the first limiting plate 6 is fixed on the connecting cover 2, the primary cylindrical gear 3 assembly is assembled on the bearing seat ring 7;
the second bearing 7 and the third bearing 8 are mounted on the gear shaft 33 and then mounted on the connection housing 2.
The assembly of the two-stage planetary reduction assembly and the outer side supporting assembly is specifically as follows:
assembling the primary planet 21, the primary planet carrier 23 and the first pin 24 into a primary planet carrier component;
assembling the secondary planet 37, the secondary planet carrier 16 and the second pin 35 into a secondary planet carrier component;
the first floating seal 11 is assembled between the fixed connecting plate 1 and the secondary rotary housing 13, and the second floating seal 25 is assembled between the inner fixed connecting piece 27 and the primary rotary housing 32;
assembling the third limiting plate 29, the outer sealing plate 28 and the inner fixing plate 27 into an inner fixing connection sub-component;
the axle center of the fixed connecting piece 1 is vertically arranged, and a fifth bearing 11, a second-stage rotary shell 13, a sealing plate 14, a second-stage sun gear 15, a second-stage planetary carrier component, a second-stage gear ring 17, a connecting ring 19, a right-angle support 34, a first-stage gear ring 20, a first-stage planetary carrier component, a second limiting plate 26, a gear shaft 33 and an internal fixed connecting sub component are sequentially arranged.
After the primary cylindrical gear reduction assembly is installed on the fixed connecting piece 1, the main body installation part of the walking speed reducer is completed.
Before the main body of the traveling speed reducer is mounted on the girder frame 38, the driving wheel 18 is placed in the girder frame 38, the traveling speed reducer main body sequentially passes through the inner side wall, the driving wheel and the outer side wall of the girder frame 38, and then the outer fixed connecting piece 31 is connected with the inner fixed connecting piece 27 and the girder frame 38 by bolts.
The structure is characterized in that the speed reducer is connected with the longitudinal beam frame by adopting a double flange type connection mode, the structural strength and the rigidity of the speed reducer are superior to those of the traditional single flange cantilever type connection mode, the whole speed reducer is positioned in the frame, the risk of collision with stones and the like is reduced to the greatest extent, the walking trafficability is improved, the structure is compact, the assembly and the disassembly are convenient, and the speed reducer is particularly suitable for ultra-large hydraulic excavators.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a walking speed reducer of heavy engineering machinery which characterized in that: the planetary gear reducer comprises a first-stage cylindrical gear reduction assembly and a second-stage planetary reduction assembly which are sequentially arranged; the two-stage planetary reduction assembly comprises a gear shaft, wherein the gear shaft penetrates through the two-stage planetary reduction assembly, and one end of the gear shaft is connected with the output end of the one-stage cylindrical gear reduction assembly; the method is characterized in that: also included is a lateral support assembly;
the outer side supporting component comprises a primary rotating shell, an inner fixed connecting piece, a third limiting plate and an outer sealing plate;
the first-stage rotary shell is of a cavity structure, one end of the first-stage rotary shell is provided with a mounting hole, and the mounting hole is connected with one end, far away from the first-stage cylindrical gear reduction assembly, of the two-stage planetary reduction assembly;
the inner fixed connecting piece is arranged in the primary rotary shell and is arranged in a mounting hole on the primary rotary shell through a seventh bearing radially surrounding the outer side of the inner fixed connecting piece;
one side of the third limiting plate is connected with the other end of the gear shaft, and the other side of the third limiting plate is connected with one side of the inner fixed connecting piece and is used for axially limiting the gear shaft;
the outer sealing plate is fixedly connected with the inner fixed connecting piece.
2. The travel speed reducer of a heavy construction machine according to claim 1, characterized in that: the primary cylindrical gear reduction assembly includes: the connecting cover is provided with a bearing seat ring, a primary cylindrical gear and a primary cylindrical gear shaft which are arranged in the connecting cover;
the bearing seat ring is connected with the inner wall of the connecting cover;
the first-stage cylindrical gear shaft is arranged on the connecting cover through a third bearing and a fourth bearing which are oppositely arranged;
the primary cylindrical gear is arranged on the bearing seat ring and the two-stage planetary reduction assembly through a first bearing and a second bearing which are oppositely arranged, and is meshed with the external teeth of the primary cylindrical gear shaft;
the hub of the primary cylindrical gear is provided with an internal spline, and the internal spline is used as the output of the primary cylindrical gear speed reduction assembly.
3. The travel speed reducer of a heavy construction machine according to claim 2, characterized in that: the two-stage planetary reduction assembly comprises a two-stage planetary reduction assembly and a one-stage planetary reduction assembly which are sequentially connected; the input end of the secondary planetary reduction assembly is connected with the output end of the primary planetary reduction assembly; the input end of the primary planetary reduction assembly is connected with the output end of the primary cylindrical gear reduction assembly.
4. A traveling speed reducer for a heavy construction machine according to claim 3, characterized in that: the secondary planetary reduction assembly comprises a fixed connecting piece, a secondary rotary shell, three secondary planetary gears, a secondary sun gear, a secondary planet carrier, a secondary annular gear and a connecting ring;
one end of the fixed connecting piece is connected with the connecting cover, and an axial through hole is formed in the fixed connecting piece;
the secondary rotary shell is supported on the fixed connecting piece through a fifth bearing;
the three secondary planet gears are circumferentially and uniformly arranged on the secondary planet carrier, encircle and are externally meshed with the secondary sun gear and internally meshed with the secondary annular gear, and the centers of tooth widths are overlapped;
the secondary planet carrier is in spline connection with the fixed connecting piece;
and after the secondary annular gear and the connecting ring are connected into a whole, the secondary annular gear is arranged on the outer side of the secondary rotary shell through a flange.
5. The traveling speed reducer for a heavy construction machine according to claim 4, wherein: the second-stage rotary shell and the fixed connecting piece are sealed by adopting a first floating seal, and a mechanical labyrinth is formed at the same time.
6. The traveling speed reducer for a heavy construction machine according to claim 4 or 5, characterized in that: the primary planetary reduction assembly comprises a gear shaft, a primary planet carrier, three primary planet gears and a primary annular gear;
the external spline of the gear shaft is connected with the internal spline of the primary cylindrical gear, and is centered by adopting a cylindrical surface;
the three primary planetary gears are circumferentially and uniformly arranged on the primary planetary carrier, encircle and are meshed with the gear shaft, are internally meshed with the primary annular gear, and are overlapped in the center of each tooth width;
the first-stage planet carrier is connected with the second-stage planet carrier through a right-angle support, an internal spline of the first-stage planet carrier is connected with an external spline of the second-stage sun gear, and the axial direction of the first-stage planet carrier is positioned through a second limiting plate.
7. The travel speed reducer of a heavy construction machine according to claim 1, characterized in that: the outer support assembly further comprises an outer fixed connecting plate which is arranged on the outer side of the primary rotary shell and connected with the edge of the inner fixed connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186708.5A CN109099139B (en) | 2018-10-12 | 2018-10-12 | Walking speed reducer of heavy engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186708.5A CN109099139B (en) | 2018-10-12 | 2018-10-12 | Walking speed reducer of heavy engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109099139A CN109099139A (en) | 2018-12-28 |
| CN109099139B true CN109099139B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811186708.5A Active CN109099139B (en) | 2018-10-12 | 2018-10-12 | Walking speed reducer of heavy engineering machinery |
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2018
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| JP2016223609A (en) * | 2015-06-03 | 2016-12-28 | 日立建機株式会社 | Speed reducer |
| CN107939914A (en) * | 2017-11-21 | 2018-04-20 | 资阳中车传动有限公司 | A kind of mine electric wheel dump retarder |
| CN209100608U (en) * | 2018-10-12 | 2019-07-12 | 徐州徐工矿山机械有限公司 | A kind of driving speed reducer of heavy engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109099139A (en) | 2018-12-28 |
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Address after: 221005 39 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant after: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Address before: 221005 39 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant before: XUZHOU XCMG MINING MACHINERY Co.,Ltd. |
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