CN103075519B - 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 PDF

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Publication number
CN103075519B
CN103075519B CN201310017420.6A CN201310017420A CN103075519B CN 103075519 B CN103075519 B CN 103075519B CN 201310017420 A CN201310017420 A CN 201310017420A CN 103075519 B CN103075519 B CN 103075519B
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CN
China
Prior art keywords
output shaft
motor output
motor
framework oil
oil seal
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Expired - Fee Related
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CN201310017420.6A
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Chinese (zh)
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CN103075519A (en
Inventor
韩永进
吕福春
姜虎
殷铈钞
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XUZHOU KEYUAN HYDRAULICS CO Ltd
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XUZHOU KEYUAN HYDRAULICS CO Ltd
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Priority to CN201310017420.6A priority Critical patent/CN103075519B/en
Publication of CN103075519A publication Critical patent/CN103075519A/en
Application granted granted Critical
Publication of CN103075519B publication Critical patent/CN103075519B/en
Expired - Fee Related legal-status Critical Current
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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

Shovel crawler running motor output shaft end seal arrangement
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
Extremely general engineering machinery applied by crawler excavator, 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.By us for many years to the actual summary of experience detecting 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.Because the processing of the planetary speed reducer part of running motor, manufacture and matching requirements are lower relative to piston motor, and through long-term service wear, the parts wears such as its inner each gear are comparatively serious, very large to the pollution of fluid.The not stationarity of the motion component brought under the foreign-matter contamination of planetary speed reducer inside and excavator bad working environments condition both increases the wearing and tearing of output shaft and outside framework oil seal.When wearing and tearing acquire a certain degree, outside framework oil seal will lose seal action, thus hydraulic oil crossfire in speed reducer cavity can be made in motor, to pollute piston motor, results in greater loss.
The crawler excavator used in the market, its oil hydraulic motor pto=power take-off is monomer structure, output shaft cylindrical directly with outside framework oil seal friction, must replacing in time after output shaft and outside framework oil seal wearing and tearing,
Change motor output shaft and the outside framework oil seal of wearing and tearing, need first to remove planetary speed reducer part, take hydraulic motor assemblies apart again, then after taking out the component such as thrust plate, cylinder body, brake piston, plunger, piston shoes, return plate, swash plate successively, could motor output shaft be taken out, then pull down bearing and just can pull down outside framework oil seal.In unloading process, need the absolute cleanliness ensureing working environment, prevent piston motor secondary pollution.Dismounting, installation procedure is very loaded down with trivial details, time-consuming, inefficiency.
In addition, because motor output shaft main working parts is all spline joint, intensity is higher, weares and teares less; Main damage position, in the position, seal junction of motor output shaft and outside framework oil seal, is changed whole motor output shaft, is caused waste, the way also had is exactly position, the seal junction chromium plating in wearing and tearing, then polishing, polishing, 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, arrange axle sleeve, axle sleeve is sleeved on motor output shaft small stair cylinder; Seal ring is installed in step end face junction that is inner at axle sleeve and motor output shaft, prevents the hydraulic oil in speed reducer cavity and oil hydraulic motor cavity from leading to mutual crossfire, affects the turbidity test of motor.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, avoids reinforced seal axial float, facilitate again the dismounting of outside framework oil seal, replacing.
The present invention is achieved through the following technical solutions: a kind of shovel crawler running motor output shaft end seal arrangement, crawler travel motor is made up of speed reducer assembly and hydraulic motor assemblies two-part, wherein speed reducer assembly is epicyclic reduction gear unit, and the central gear in described epicyclic reduction gear unit is connected with the motor output shaft in hydraulic motor assemblies by axle head spline.Described hydraulic motor assemblies 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 arranged in the groove of motor casing.It is characterized in that: between described motor output shaft and outside framework oil seal, arrange axle sleeve, described axle sleeve is circular pipe, and described circular pipe is sleeved on motor output shaft small stair cylinder, locks between axle sleeve and motor output shaft with Cock screw; The sealing lip of described outside framework oil seal is close on the cylindrical of axle sleeve.
Seal ring is installed in step end face junction that is inner at described axle sleeve and motor output shaft.
In the axis hole of described motor casing left end, boss is left on the right side being positioned at outside framework oil seal, and be positioned at the left side mounting hole back-up ring of outside framework oil seal, outside framework oil seal is pressed on described boss by described hole back-up ring.
The invention has the beneficial effects as follows:
1, motor output shaft is not frayed, without the need to repairs such as replacing and chromium plating, polishing, polishings, only needs reinforced seal and the axle sleeve of changing wearing and tearing, avoids the waste that replacing motor output shaft causes.
2, change reinforced seal and the axle sleeve of wearing and tearing, only need to take planetary speed reducer part apart and just can realize, easy to maintenance, convenient, fast.
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 unloading process.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A place partial enlarged drawing of Fig. 1.
In 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, 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, crawler travel motor is made up of speed reducer assembly 1 and hydraulic motor assemblies two-part, wherein speed reducer assembly 1 is epicyclic reduction gear unit, and the central gear 2 in described epicyclic reduction gear unit is connected with the motor output shaft 3 in hydraulic motor assemblies by axle head spline.Described hydraulic motor assemblies 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 arranged in the groove of motor casing 10.It is characterized in that: between described motor output shaft 3 and outside framework oil seal 6, arrange axle sleeve 5, described axle sleeve 5 is circular pipe, and described circular pipe is sleeved on motor output shaft 3 small stair cylinder, locks between axle sleeve 5 and motor output shaft 3 with Cock screw 4.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, without the need to repairs such as replacing and chromium plating, polishing, polishings.Only need reinforced seal 6 and the axle sleeve 5 of changing wearing and tearing, avoid the waste that replacing motor output shaft 3 causes.
Seal ring 8 is installed in step end face junction that is inner at described axle sleeve 5 and motor output shaft 3.The effect of seal ring 8 prevents hydraulic oil in speed reducer cavity and oil hydraulic motor cavity by the mutual crossfire of the matching gap between axle sleeve 5 and motor output shaft 3, affects the turbidity test of motor.
In the axis hole of described motor casing 10 left end, boss is left on the right side being 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.Outside framework oil seal 6 is pressed on described boss by described hole back-up ring 7.Avoid reinforced seal 6 axial float, facilitate again the dismounting of outside framework oil seal 6, replacing.
As shown in Figure 1 and Figure 2: after running motor uses certain hour, occur serious wear, when needing reinforced seal 6 and the axle sleeve 5 changing wearing and tearing, its operation technological process is:
1, first pull down the rear end cover of speed reducer assembly 1, then take out primary planet carrier, central gear 2, secondary center wheel, planetary carrier 1-1 successively; Now reinforced seal 6 reveals all completely.
2, pull down two Cock screws 4 by inner hexagon spanner, utilize two Cock screw 4 holes to be taken out by the axle sleeve 5 of wearing and tearing.
3, pull down hole back-up ring 7, utilize the radial clearance stayed after taking out axle sleeve 5, taken off the reinforced seal 6 of wearing and tearing by frock.
4, take out seal ring 8, check breakage, unloading process completes.
As shown in Figure 1 and Figure 2: install new reinforced seal 7 and axle sleeve 5, its operation technological process is:
1, the end mating part of motor output shaft 3 is cleaned up, install seal ring 8.
2, reinforced seal 6 is pressed into gently to precalculated position.
3, the axle sleeve 5 scribbling lubricant oil loads the end of motor output shaft 3, tightens Cock screw 4, the right side of axle sleeve 5 is expressed to seal ring 8 on the step end face of motor output shaft 3, installs hole back-up ring 7.
4, install planetary speed reducer part successively, change installation process and terminate.

Claims (3)

1. a shovel crawler running motor output shaft end seal arrangement, crawler travel motor is made up of speed reducer assembly (1) and hydraulic motor assemblies two-part, wherein speed reducer assembly (1) is epicyclic reduction gear unit, and the central gear (2) in described epicyclic reduction gear unit is connected with the motor output shaft (3) in hydraulic motor assemblies by axle head spline; Described hydraulic motor assemblies 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 arranged 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) small stair cylinder, locks between axle sleeve (5) and motor output shaft (3) with Cock screw (4); 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: seal ring (8) is installed in step end face junction that is inner at described axle sleeve (5) and motor output shaft (3).
3. shovel crawler running motor output shaft end seal arrangement according to claim 1, is characterized in that: in the axis hole of described motor casing (10) left end, boss is left on the right side being positioned at outside framework oil seal (6); Be positioned at left side mounting hole back-up ring (7) of outside framework oil seal (6); Outside framework oil seal (6) is pressed on described boss by described hole back-up ring (7).
CN201310017420.6A 2013-01-17 2013-01-17 Shaft end sealing device for output shaft of walking motor of crawler excavator Expired - Fee Related CN103075519B (en)

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

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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

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CN103075519B true CN103075519B (en) 2015-02-18

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Citations (7)

* Cited by examiner, † Cited by third party
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
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

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