CN103075519A - Shaft end sealing device for output shaft of walking motor of crawler excavator - Google Patents
Shaft end sealing device for output shaft of walking motor of crawler excavator Download PDFInfo
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- CN103075519A CN103075519A CN2013100174206A CN201310017420A CN103075519A CN 103075519 A CN103075519 A CN 103075519A CN 2013100174206 A CN2013100174206 A CN 2013100174206A CN 201310017420 A CN201310017420 A CN 201310017420A CN 103075519 A CN103075519 A CN 103075519A
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- output shaft
- motor output
- motor
- seal
- framework oil
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Abstract
The invention discloses a shaft end sealing device for an output shaft of a walking motor of a crawler excavator, which relates to the industry of engineering machinery. A shaft sleeve is arranged between the motor output shaft and a framework oil seal, is arranged on a small step cylinder of the motor output shaft, and is locked by using a fastening screw; a sealing ring is arranged at the joint of the inner end of the shaft sleeve and the step end face of the motor output shaft, so that leakage of hydraulic oil is prevented from influencing the cleanliness of a motor cavity; and a boss is reserved on the right side of the framework oil seal, and a retainer ring is arranged in a left side installation hole, so that the framework seal is prevented from moving axially. After wear between the framework oil seal and the motor output shaft occurs, only the worn framework seal and shaft sleeve are required to be replaced without replacing the motor output shaft, so that waste is reduced. Replacement work can be performed only by detaching a planet-gear reducer easily and conveniently without detaching an entire hydraulic motor part, so that secondary pollution in the detaching process of the hydraulic motor is avoided, the maintenance time is shortened greatly, and the maintenance efficienecy is increased.
Description
Technical field
The present invention relates to a kind of engineering machinery, be specifically related to shovel crawler running motor output shaft end seal arrangement.
Background technique
Crawler excavator is to use extremely general engineering machinery, crawler-type traveling is by fluid motor-driven, the end of oil hydraulic motor pto＝power take-off is connected with hydraulic motor casing with outside framework oil seal by bearing, and the splined hole of output shaft end is connected with the central gear of planetary pinion subtrahend mechanism.For many years to the actual summary of experience that detects and keep in repair of excavator, find position, the seal junction wearing and tearing especially severe of motor output shaft and outside framework oil seal by us.Because the relative piston motor of processing, manufacturing and matching requirements of the planetary speed reducer of running motor part is lower, and through long-term service wear, the parts wears such as its inner each gear are comparatively serious, and are very large to the pollution of fluid.The not stationarity of the motion component that bring under the foreign-matter contamination of planetary speed reducer inside and the excavator bad working environments condition has all increased the wearing and tearing of output shaft and outside framework oil seal.When wearing and tearing acquired a certain degree, outside framework oil seal will lose seal action, and the hydraulic oil crossfire pollutes piston motor in the speed reducer cavity in the motor cavity thereby can make, and results in greater loss.
The crawler excavator that uses in the market, its oil hydraulic motor pto＝power take-off is monomer structure, the direct and outside framework oil seal friction of output shaft cylindrical must in time be changed after output shaft and the outside framework oil seal wearing and tearing,
Change motor output shaft and the outside framework oil seal of wearing and tearing, need to remove first the planetary speed reducer part, take again the oil hydraulic motor assembly apart, then after taking out successively the component such as thrust plate, cylinder body, brake piston, plunger, piston shoes, return plate, swash plate, could take out motor output shaft, then pull down bearing and just can pull down outside framework oil seal.In unloading process, need to guarantee the absolute cleaning of working environment, prevent the piston motor secondary pollution.Dismounting, installation procedure is very loaded down with trivial details, time-consuming, inefficiency.
In addition, because motor output shaft groundwork part all is spline joint, intensity is higher, and it is less to wear and tear; Whole motor output shaft changed in the position, seal junction of motor output shaft and outside framework oil seal in the main damage position, causes waste, the way that also has is exactly position, the seal junction chromium plating in wearing and tearing, and then polish, polish, but such maintenance, time is longer, is unfavorable for actual need of production.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of shovel crawler running motor output shaft end seal arrangement, between described motor output shaft and outside framework oil seal, axle sleeve is set, axle sleeve is sleeved on the motor output shaft small stair cylinder; Seal ring is installed in inner step end face junction with motor output shaft at axle sleeve, prevents the logical mutual crossfire of hydraulic oil in speed reducer cavity and the oil hydraulic motor cavity, affects the turbidity test of motor cavity.Boss is left on the right side of outside framework oil seal, and the left side mounting hole back-up ring of outside framework oil seal is avoided the reinforced seal axial float, makes things convenient for again dismounting, the replacing of outside framework oil seal.
The present invention is achieved through the following technical solutions: a kind of shovel crawler running motor output shaft end seal arrangement, the crawler travel motor is comprised of speed reducer assembly and oil hydraulic motor assembly two-part, wherein the speed reducer assembly is epicyclic reduction gear unit, and the central gear in the described epicyclic reduction gear unit is connected with motor output shaft in the oil hydraulic motor assembly by the axle head spline.Described oil hydraulic motor assembly comprises: motor casing, swash plate, piston shoes, return plate, brake piston, cylinder body and thrust plate.The cylindrical of described motor output shaft axle head is connected with motor casing by bearing; There is outside framework oil seal the outer end of bearing, and described outside framework oil seal is installed in the groove of motor casing.It is characterized in that: between described motor output shaft and outside framework oil seal axle sleeve is set, described axle sleeve is circular pipe, and described circular pipe is sleeved on the motor output shaft small stair cylinder, locks with Cock screw between axle sleeve and the motor output shaft; The sealing lip of described outside framework oil seal is close on the cylindrical of axle sleeve.
Seal ring is installed in inner step end face junction with motor output shaft at described axle sleeve.
In the axis hole of described motor casing left end, boss is left on the right side that is positioned at outside framework oil seal, is positioned at the left side mounting hole back-up ring of outside framework oil seal, and described hole is pressed on outside framework oil seal on the described boss with back-up ring.
The invention has the beneficial effects as follows:
1, motor output shaft is not frayed, need not the repairs such as replacing and chromium plating, polishing, polishing, only needs to change reinforced seal and the axle sleeve of wearing and tearing, avoids changing the waste that motor output shaft causes.
2, change reinforced seal and the axle sleeve of wearing and tearing, only need to take the planetary speed reducer part apart and just can realize, easy to maintenance, convenient, quick.
3, change reinforced seal and the axle sleeve of wearing and tearing, do not need to remove this critical component of piston motor, avoid the secondary pollution in the unloading process.
Description of drawings
The present invention is further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A place partial enlarged drawing of Fig. 1.
Among the figure: 1, speed reducer assembly, 1-1, planetary carrier, 2, central gear, 3, motor output shaft, 4, Cock screw, 5, axle sleeve, 6, outside framework oil seal, 7, the hole back-up ring, 8, seal ring, 9, bearing, 10, motor casing, 11, swash plate, 12, piston shoes, 13, return plate, 14, brake piston, 15, cylinder body, 16, thrust plate.
Embodiment
As shown in Figure 1 and Figure 2: a kind of shovel crawler running motor output shaft end seal arrangement, the crawler travel motor is comprised of speed reducer assembly 1 and oil hydraulic motor assembly two-part, wherein speed reducer assembly 1 is epicyclic reduction gear unit, and central gear in the described epicyclic reduction gear unit 2 is connected with motor output shaft 3 in the oil hydraulic motor assembly by the axle head spline.Described oil hydraulic motor assembly comprises: motor casing 10, swash plate 11, piston shoes 12, return plate 13, brake piston 14, cylinder body 15 and thrust plate 16.The cylindrical of described motor output shaft 3 axle heads is connected with motor casing 10 by bearing 9.There is outside framework oil seal 6 outer end of bearing 9, and described outside framework oil seal 6 is installed in the groove of motor casing 10.It is characterized in that: between described motor output shaft 3 and outside framework oil seal 6 axle sleeve 5 is set, described axle sleeve 5 is circular pipe, and described circular pipe is sleeved on the motor output shaft 3 small stair cylinders, locks with Cock screw 4 between axle sleeve 5 and the motor output shaft 3.The sealing lip of described outside framework oil seal 6 is close on the cylindrical of axle sleeve 5.Motor output shaft 3 is not frayed, need not the repairs such as replacing and chromium plating, polishing, polishing.Only need to change reinforced seal 6 and the axle sleeve 5 of wearing and tearing, avoid changing the waste that motor output shaft 3 causes.
In described axle sleeve 5 inner step end face junctions with motor output shaft 3 seal ring 8 is installed.The effect of seal ring 8 is to prevent that hydraulic oil in speed reducer cavity and the oil hydraulic motor cavity from by the mutual crossfire of matching gap between axle sleeve 5 and the motor output shaft 3, affecting the turbidity test of motor cavity.
In the axis hole of described motor casing 10 left ends, boss is left on the right side that is positioned at outside framework oil seal 6; Be positioned at the left side mounting hole back-up ring 7 of outside framework oil seal 6.Described hole is pressed on outside framework oil seal 6 on the described boss with back-up ring 7.Avoid reinforced seal 6 axial floats, make things convenient for again dismounting, the replacing of outside framework oil seal 6.
As shown in Figure 1 and Figure 2: after running motor uses certain hour, serious wear occurs, when the reinforced seal 6 of needs replacing wearing and tearing and axle sleeve 5, its operation technological process is:
1, pulls down first the rear end cover of speed reducer assembly 1, then take out successively primary planet carrier, central gear 2, secondary center wheel, planetary carrier 1-1; Reinforced seal 6 this moment all reveals completely.
2, pull down two Cock screws 4 by inner hexagon spanner, utilize two Cock screw 4 holes with axle sleeve 5 taking-ups of wearing and tearing.
3, pull down the hole with back-up ring 7, utilize and take out the radial clearance that stays behind the axle sleeve 5, take off the reinforced seal 6 of wearing and tearing by frock.
4, take out seal ring 8, check damaged situation, unloading process is finished.
As shown in Figure 1 and Figure 2: new reinforced seal 7 and axle sleeve 5 are installed, and its operation technological process is:
1, the end mating part with motor output shaft 3 cleans up, and installs seal ring 8.
2, be pressed into gently reinforced seal 6 to the precalculated position.
3, Cock screw 4 is tightened in pack into the end of motor output shaft 3 of the axle sleeve 5 that scribbles lubricant oil, and the right side of axle sleeve 5 is expressed to seal ring 8 on the step end face of motor output shaft 3, installs the hole with back-up ring 7.
4, install successively the planetary speed reducer part, change installation process and finish.
Claims (3)
1. shovel crawler running motor output shaft end seal arrangement, the crawler travel motor is comprised of speed reducer assembly (1) and oil hydraulic motor assembly two-part, wherein speed reducer assembly (1) is epicyclic reduction gear unit, and the central gear in the described epicyclic reduction gear unit (2) is connected with motor output shaft (3) in the oil hydraulic motor assembly by the axle head spline; Described oil hydraulic motor assembly comprises: motor casing (10), swash plate (11), piston shoes (12), return plate (13), brake piston (14), cylinder body (15) and thrust plate (16); The cylindrical of described motor output shaft (3) axle head is connected with motor casing (10) by bearing (9); There is outside framework oil seal (6) outer end of bearing (9), and described outside framework oil seal (6) is installed in the groove of motor casing (10); It is characterized in that: between described motor output shaft (3) and outside framework oil seal (6), axle sleeve (5) is set, described axle sleeve (5) is circular pipe, described circular pipe is sleeved on motor output shaft (3) the small stair cylinder, locks with Cock screw (4) between axle sleeve (5) and the motor output shaft (3); The sealing lip of described outside framework oil seal (6) is close on the cylindrical of axle sleeve (5).
2. shovel crawler running motor output shaft end seal arrangement according to claim 1 is characterized in that: in described axle sleeve (5) the inner and the step end face junction of motor output shaft (3) seal ring (8) is installed.
3. shovel crawler running motor output shaft end seal arrangement according to claim 1, it is characterized in that: in the axis hole of described motor casing (10) left end, boss is left on the right side that is positioned at outside framework oil seal (6); Be positioned at the left side mounting hole back-up ring (7) of outside framework oil seal (6); Described hole is pressed on outside framework oil seal (6) on the described boss with back-up ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310017420.6A CN103075519B (en) | 2013-01-17 | 2013-01-17 | Shaft end sealing device for output shaft of walking motor of crawler excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310017420.6A CN103075519B (en) | 2013-01-17 | 2013-01-17 | Shaft end sealing device for output shaft of walking motor of crawler excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103075519A true CN103075519A (en) | 2013-05-01 |
| CN103075519B CN103075519B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310017420.6A Expired - Fee Related CN103075519B (en) | 2013-01-17 | 2013-01-17 | Shaft end sealing device for output shaft of walking motor of crawler excavator |
Country Status (1)
| Country | Link |
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| CN (1) | CN103075519B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129445A (en) * | 2014-07-28 | 2014-11-05 | 上海三一重机有限公司 | Walking speed-reducing mechanism convenient for replacement of floating oil seal and excavator thereof |
| CN106059187A (en) * | 2016-05-24 | 2016-10-26 | 中国科学院长春光学精密机械与物理研究所 | Reversible anti-lock motor drive shafting structure |
| CN114855903A (en) * | 2022-04-29 | 2022-08-05 | 三一重机有限公司 | Connection structure of accessory and operation arm and operation machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3709186A (en) * | 1971-01-21 | 1973-01-09 | T Gotmalm | Propelling means for motor boats and auxiliary sailing yachts |
| DE2754168C2 (en) * | 1976-12-07 | 1982-09-09 | Kabushiki Kaisha Fujikoshi, Toyama | Shaft seal |
| JPH07251764A (en) * | 1994-03-14 | 1995-10-03 | Mitsubishi Agricult Mach Co Ltd | Sealing portion structure of crawler drive shaft |
| CN101581360A (en) * | 2009-06-23 | 2009-11-18 | 吴声震 | Strong sealing oil motor driving speed reducer |
| CN201627928U (en) * | 2010-04-29 | 2010-11-10 | 太原重工股份有限公司 | Combined sealing device of input shaft of gear box |
| CN201731066U (en) * | 2010-04-28 | 2011-02-02 | 陈浩 | Dynamic reducer shaft end seal structure |
| CN203146821U (en) * | 2013-01-17 | 2013-08-21 | 徐州科源液压股份有限公司 | Shaft end sealing device of output shaft of traveling motor of crawler excavator |
-
2013
- 2013-01-17 CN CN201310017420.6A patent/CN103075519B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3709186A (en) * | 1971-01-21 | 1973-01-09 | T Gotmalm | Propelling means for motor boats and auxiliary sailing yachts |
| DE2754168C2 (en) * | 1976-12-07 | 1982-09-09 | Kabushiki Kaisha Fujikoshi, Toyama | Shaft seal |
| JPH07251764A (en) * | 1994-03-14 | 1995-10-03 | Mitsubishi Agricult Mach Co Ltd | Sealing portion structure of crawler drive shaft |
| CN101581360A (en) * | 2009-06-23 | 2009-11-18 | 吴声震 | Strong sealing oil motor driving speed reducer |
| CN201731066U (en) * | 2010-04-28 | 2011-02-02 | 陈浩 | Dynamic reducer shaft end seal structure |
| CN201627928U (en) * | 2010-04-29 | 2010-11-10 | 太原重工股份有限公司 | Combined sealing device of input shaft of gear box |
| CN203146821U (en) * | 2013-01-17 | 2013-08-21 | 徐州科源液压股份有限公司 | Shaft end sealing device of output shaft of traveling motor of crawler excavator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129445A (en) * | 2014-07-28 | 2014-11-05 | 上海三一重机有限公司 | Walking speed-reducing mechanism convenient for replacement of floating oil seal and excavator thereof |
| CN106059187A (en) * | 2016-05-24 | 2016-10-26 | 中国科学院长春光学精密机械与物理研究所 | Reversible anti-lock motor drive shafting structure |
| CN114855903A (en) * | 2022-04-29 | 2022-08-05 | 三一重机有限公司 | Connection structure of accessory and operation arm and operation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103075519B (en) | 2015-02-18 |
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Granted publication date: 20150218 Termination date: 20170117 |