CN101864786B - Driving speed reducer for hydraulic excavator - Google Patents
Driving speed reducer for hydraulic excavator Download PDFInfo
- Publication number
- CN101864786B CN101864786B CN2010102039900A CN201010203990A CN101864786B CN 101864786 B CN101864786 B CN 101864786B CN 2010102039900 A CN2010102039900 A CN 2010102039900A CN 201010203990 A CN201010203990 A CN 201010203990A CN 101864786 B CN101864786 B CN 101864786B
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- Prior art keywords
- housing
- fixed head
- speed reducer
- driving speed
- level
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/46—Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a driving speed reducer for a hydraulic excavator. The driving speed reducer comprises a first three-stage planetary gear train, a second three-stage planetary gear train, a third three-stage planetary gear train in a shell, and a travel motor. The driving speed reducer is characterized by also comprising an axial fixing mechanism, wherein the axial fixing mechanism consists of a fixing plate and a plurality of bolts; a plurality of threaded holes are annually reserved on the periphery of the central hole of a third stage planetary frame; through holes are reserved at positions, corresponding to the threaded holes, of the shell and the fixing plate; the fixing plate is provided with a central hole which is matched with an output shaft; the fixing plate is sleeved on the output shaft through the central hole; and the bottom surface of the fixing plate is resisted against the shall and is connected with the threaded holes on the third stage planetary frame by the bolts through the through holes on the shell and the fixing plate. In the driving speed reducer, the axial fixing mechanism is arranged for realizing axial positioning between a planetary frame and the shell so as to avoid relative displacement and looseness between the planetary frame and the shell, reduce abrasion, prolong service life and reduce noise.
Description
Technical field
The present invention relates to a kind of reductor, relate in particular to a kind of driving speed reducer for hydraulic excavator.
Background technology
Driving speed reducer for hydraulic excavator is made of the third-level planetary train at present, as shown in Figure 1, running motor 15 output shafts 16 are connected with the one-level sun gear by spline, running motor 15 drives first order sun gear and rotates, after rotating with the planetary gear of first order sun gear engagement, first order planet carrier drives second level sun gear and rotates, after rotating with the planetary gear of second level sun gear engagement, second level planet carrier drives third level sun gear and rotates, third level planet carrier 13 is circumferentially fixing with housing 14, and vehicle frame is connected with bolt under housing 14 and the excavator, therefore rotates the walking of realization excavator relative to housing 14 with the gear ring 11 that third level planetary gear 12 cooperates.
In the third-level planetary train, the moment of torsion maximum of third level gear transmission, so the volume maximum of its planet carrier, weight are also maximum.Because the operation operating mode of excavator is relatively poor, in the process of walking, driving speed reducer is often vibrated and is impacted, and wherein third level planet carrier is because weight is big, and the also more preceding two-stage of the impact that is subjected to is big.Usually third level planet carrier is that spline is connected with housing, and this connected mode can only guarantee radial position, can not guarantee axial location, and therefore under the vibratory impulse effect, the relative housing of third level planet carrier is easy to generate axial play.
As mentioned above, in case the axial play of third level planet carrier and housing occurs, will have influence on the meshing relation between the planet circular system, inner vibration and the noise of occurring of reductor will speed up the wearing and tearing between gear simultaneously, finally causes the damage of reductor.
At this phenomenon, at present the countermeasure made of for example Japanese Xiao Song of producer is, third level planet carrier and housing are made an integral body, makes by casting.This way can be good at guaranteeing radial and axial position, when still in a single day needing to adjust the speed reducing ratio of reductor, changes planet carrier and just certainly will simultaneously whole housing more be changed, and complex operation, workload is big, and cost is also high.
Summary of the invention
The object of the invention provides a kind of driving speed reducer for hydraulic excavator, by the improvement to structure, can avoid the loosening phenomenon between planet carrier and housing, improves wearing and tearing and noise, prolongs complete machine application life.
For achieving the above object, the technical solution used in the present invention is: a kind of driving speed reducer for hydraulic excavator, comprise housing, in the housing first, second, the 3rd third-level planetary train, and running motor, the output shaft of described running motor is connected with first order planet circular system, drive first, second, third level planet circular system rotates, third level planet carrier in the described third level planet circular system is connected through spline with described housing, described housing is fixedlyed connected with vehicle frame under the digging machine, comprise an axial restraint mechanism, this axial restraint mechanism is made of a fixed head and a plurality of screw, the centre bore of described third level planet carrier is around with the screwed hole that a plurality of and described screw matches, the described housing and the described fixed head at corresponding each described screwed hole place are provided with through hole, described fixed head is provided with the centre bore that matches with described output shaft, described fixed head is sheathed on the described output shaft through this centre bore, the fixed head bottom surface is butted on the described housing, and is connected with screwed hole on the described third level planet carrier through the through hole on described housing and the fixed head by described screw.
Above, be provided with the third-level planetary train in the described housing, be respectively first order planet circular system, second level planet circular system and third level planet circular system, each planet circular system is by sun gear, planetary gear and planet carrier constitute, the running motor output shaft is connected with first order sun gear by spline, running motor drives first order sun gear and rotates, after rotating with the planetary gear of first order sun gear engagement, first order planet carrier drives second level sun gear and rotates, after rotating with the planetary gear of second level sun gear engagement, second level planet carrier drives third level sun gear and rotates, and third level planet carrier and housing are circumferentially fixed, and vehicle frame is connected with bolt under housing and the digging machine, therefore rotate relative to housing with the gear ring that third level planetary gear cooperates, realize the walking of digging machine.In the technique scheme; be provided with a plurality of screwed holes around the centre bore of described third level planet carrier; on housing, be provided with corresponding with it through hole; pass through fixed head; screw and screwed hole; the cooperation of through hole; the fixed head bottom surface is butted on the described housing; and pass through hole on the fixed head with screw; screwed hole on through hole on the housing and the third level planet carrier is spirally connected fixing; thereby third level planet carrier and housing are linked together; for providing axial location between third level planet carrier and the housing; combined with the circumferential location that spline gives; guaranteed the stability between third level planet carrier and the housing; that avoids being produced by vibratory impulse is loosening relatively; the protection reductor reduces the noise in the reductor.Simultaneously, when needs are adjusted speed reducing ratio, only need to change third level planet carrier, need not to change housing, reduced workload greatly, reduced cost of production.
In the technique scheme, each through hole is provided with the countersunk head groove on the corresponding described fixed head, and the head of described screw sinks in the corresponding described countersunk head groove.
In the technique scheme, described screwed hole is 6～10, and annular is distributed in around the described third level planet carrier centre bore.
In the technique scheme, described housing is provided with the sinking step that matches with described fixed head, and described fixed head is arranged in this sinking step.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. the present invention has set up the axial restraint mechanism that is made up of screw and fixed head; on third level planet carrier, offer screwed hole; on housing, be provided with and the corresponding through hole of screwed hole; the fixed head bottom surface is butted on the described housing; and pass through hole on the fixed head, through hole on the housing and the screwed hole on the third level planet carrier with screw and be spirally connected fixing; thereby third level planet carrier and housing are linked together; for providing axial location between third level planet carrier and the housing; that avoids being produced by vibratory impulse is loosening relatively; the protection reductor reduces the noise in the reductor.
2. because axial restraint mechanism is that to adopt screw to be spirally connected fixing, thereby when needs are adjusted the reductor speed reducing ratio, only need dismantle axial restraint mechanism, change planet carrier, compare, need not to change housing with existing casting integrated, reduce workload greatly, and reduced cost of production.
Description of drawings
Fig. 1 is the broken section structural representation of background technology of the present invention;
Fig. 2 is the broken section structural representation of the embodiment of the invention one;
Fig. 3 be Fig. 2 center platen A to partial schematic diagram.
Wherein: 1, gear ring; 2, third level planetary gear; 3, third level planetary wheel carrier; 4, housing; 5, running motor; 6, output shaft; 7, fixed head; 8, screw; 11, gear ring; 12, third level planetary gear; 13, third level planetary wheel carrier; 14, housing; 15, running motor; 16, output shaft.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: shown in Fig. 2～3, a kind of driving speed reducer for hydraulic excavator, comprise housing 4, in the housing 4 first, second, the 3rd third-level planetary train, and running motor 5, each planet circular system is by sun gear, planetary gear and planet carrier constitute, running motor 5 output shafts 6 are connected with first order sun gear by spline, running motor drives first order sun gear and rotates, after rotating with the planetary gear of first order sun gear engagement, first order planet carrier drives second level sun gear and rotates, after rotating with the planetary gear of second level sun gear engagement, second level planet carrier drives third level sun gear and rotates, third level planet carrier 3 is fixed through circumferential with housing 4, and by being arranged at the axial restraint mechanism formation axial location in housing 4 outsides, and vehicle frame is connected with bolt under housing 4 and the excavator, therefore rotates the walking of realization excavator relative to housing 4 with the gear ring 1 that third level planetary gear 2 cooperates.
Described axial restraint mechanism constitutes (as shown in Figure 3) by a fixed head 7 and 6 screws 8, the centre bore of described third level planet carrier 3 is around with 6 screwed holes that match with described screw 8, the described housing 4 at corresponding each described screwed hole place is provided with through hole, corresponding each screwed hole is provided with the through hole that has the countersunk head groove on the described fixed head 7, be provided with the centre bore that matches with described output shaft 6 in the middle of the fixed head 7, described fixed head is sheathed on the described output shaft 6 through this centre bore, the sinking step that described housing 4 matches with described fixed head 7, fixed head 7 bottom surfaces are butted on the sinking step bottom surface of described housing 4, pass the through hole that has the countersunk head groove on through hole on the housing 4 and the fixed head 7 by described screw 8, with screwed hole on the described third level planet carrier 3 be spirally connected fixing, as shown in Figure 2.
In the present embodiment; by changing the partial structurtes of third level planet carrier 3 and housing 4; add screw 8 and fixed head 7; third level planet carrier 3 and housing 4 are carried out axial restraint; it is loosening relatively that both can not taken place when vibratory impulse; thereby when having protected inner each component of driving speed reducer effectively, reduced the noise of reductor.In a single day and in the time of need adjusting the reductor speed reducing ratio, only need to change planet carrier, need not to change housing 4, reduced workload greatly, and reduced cost of production.
Claims (4)
1. driving speed reducer for hydraulic excavator, comprise housing, in the housing first, second, the 3rd third-level planetary train, and running motor (5), the output shaft (6) of described running motor (5) is connected with first order planet circular system, drive first, second, third level planet circular system rotates, third level planet carrier (3) in the described third level planet circular system is connected through spline with described housing (4), described housing (4) is fixedlyed connected with vehicle frame under the excavator, it is characterized in that: also comprise an axial restraint mechanism, this axial restraint mechanism is made of a fixed head (7) and a plurality of screw (8), the centre bore of described third level planet carrier (3) is around with the screwed hole that a plurality of and described screw matches, the described housing and the described fixed head at corresponding each described screwed hole place are provided with through hole, described fixed head (7) is provided with the centre bore that matches with described output shaft (6), described fixed head (7) is sheathed on the described output shaft (6) through this centre bore, fixed head (7) bottom surface is butted on the described housing (4), and is connected with screwed hole on the described third level planet carrier (3) through the through hole on described housing (4) and the fixed head (7) by described screw (8).
2. driving speed reducer for hydraulic excavator according to claim 1 is characterized in that: corresponding described fixed head (7) is gone up each through hole and is provided with the countersunk head groove, and the head of described screw (8) sinks in the corresponding described countersunk head groove.
3. driving speed reducer for hydraulic excavator according to claim 1 is characterized in that: described screwed hole is 6～10, and annular is distributed in around described third level planet carrier (3) centre bore.
4. driving speed reducer for hydraulic excavator according to claim 1 is characterized in that: described housing (4) is provided with the sinking step that matches with described fixed head (4), and described fixed head (7) is arranged in this sinking step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102039900A CN101864786B (en) | 2010-06-21 | 2010-06-21 | Driving speed reducer for hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102039900A CN101864786B (en) | 2010-06-21 | 2010-06-21 | Driving speed reducer for hydraulic excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101864786A CN101864786A (en) | 2010-10-20 |
| CN101864786B true CN101864786B (en) | 2011-10-12 |
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ID=42956696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102039900A Expired - Fee Related CN101864786B (en) | 2010-06-21 | 2010-06-21 | Driving speed reducer for hydraulic excavator |
Country Status (1)
| Country | Link |
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| CN (1) | CN101864786B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2807118B1 (en) * | 2000-03-28 | 2002-07-05 | Mannesmann Rexroth Sa | HYDRAULIC CIRCUIT FOR OPERATING MULTIPLE HYDRAULIC RECEIVERS |
| JP4282871B2 (en) * | 2000-04-14 | 2009-06-24 | 日立建機株式会社 | Hydraulic traveling vehicle |
| CN2489145Y (en) * | 2001-06-12 | 2002-05-01 | 舟山市行星减速机制造有限公司 | Hydraulic motor driven speed reducer |
| CN201396401Y (en) * | 2009-04-18 | 2010-02-03 | 赣州五环机器有限责任公司 | Traveling planetary speed reducer |
-
2010
- 2010-06-21 CN CN2010102039900A patent/CN101864786B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101864786A (en) | 2010-10-20 |
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Granted publication date: 20111012 Termination date: 20150621 |
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