CN107745754B - High-reliability guide wheel structure and excavator - Google Patents
High-reliability guide wheel structure and excavator Download PDFInfo
- Publication number
- CN107745754B CN107745754B CN201711094040.7A CN201711094040A CN107745754B CN 107745754 B CN107745754 B CN 107745754B CN 201711094040 A CN201711094040 A CN 201711094040A CN 107745754 B CN107745754 B CN 107745754B
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- Prior art keywords
- guide wheel
- sealing
- ring
- bearing seat
- wheel structure
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- 238000007789 sealing Methods 0.000 claims abstract description 119
- 239000010687 lubricating oil Substances 0.000 claims abstract description 18
- 230000013011 mating Effects 0.000 claims description 8
- 239000003921 oil Substances 0.000 abstract description 18
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
-
- 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
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention discloses a high-reliability guide wheel structure and an excavator, and relates to the field of engineering machinery. The guide wheel structure comprises a guide wheel, a wheel shaft and a bearing seat; the wheel axle passes through the through holes on the guide wheel and the bearing seat, and a double-layer or multi-layer sealing structure for preventing lubricating oil leakage is arranged on the matching surface of the guide wheel and the bearing seat. The guide wheel structure provided by the technical scheme can realize multi-layer sealing, so that the probability of oil leakage can be effectively reduced, the performance and the service life of the guide wheel structure are improved, and the guide wheel structure has practicability.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a high-reliability guide wheel structure and an excavator.
Background
The guide wheel is one of the walking parts of the excavator, and on one hand, the guide wheel moves relative to the caterpillar track assembly to play a guiding role, and on the other hand, the guide wheel and the tensioning device jointly act to realize tensioning adjustment of the caterpillar track. The guide wheel has high technical requirements and is extremely easy to damage.
At present, a guide wheel of an excavator generally uses a floating oil seal to mechanically seal lubricating oil in a sealing cavity. For lubrication, a certain amount of lubricating oil is injected into the guide wheel closed cavity through the oil injection hole on the bearing seat during assembly, and sealing is realized by using the oil plug. When the two pairs of floating seal rings rotate relatively, a part of lubricating oil can enter between the contact surfaces of the two floating seal rings, and a layer of lubricating oil film is formed on the two contact surfaces, so that the dual purposes of lubrication and sealing are realized.
The inventors found that at least the following problems exist in the prior art: at present, the guide wheel adopts a floating seal ring to realize dynamic seal, so that the leakage factors are more, and the difficulty of solving the leakage problem is high. Seal failure is the most significant cause of oil leakage of the guide wheel, and once seal failure occurs, lubricating oil in the guide wheel can leak quickly, and further the guide wheel is rapidly failed due to lack of lubrication inside. During the operation of the excavator, damage to the guide wheels due to oil leakage and the like often occurs. And once the guide wheel is damaged, the construction is stopped, and a new guide wheel is replaced, so that the production efficiency of the construction is seriously affected, and the labor intensity of workers is increased.
Disclosure of Invention
One of the purposes of the invention is to provide a guide wheel structure and an excavator, which are used for improving the performance of the existing guide wheel structure and reducing or even preventing the oil leakage problem.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a guide wheel structure, which comprises a guide wheel, a wheel shaft and a bearing seat, wherein the guide wheel is arranged on the wheel shaft; the wheel axle passes through the guide wheel and the through hole on the bearing seat, and the matching surface of the guide wheel and the bearing seat is provided with a double-layer or multi-layer sealing structure for preventing lubricating oil from leaking.
In an alternative embodiment, the seal structure comprises a first seal structure disposed in the lubrication cavity.
In an alternative embodiment, the guide wheel and the bearing seat are both provided with concave structures, and the two concave structures are spliced to form the lubricating oil cavity.
In an alternative embodiment, the sealing structure further comprises a second sealing structure, which is arranged at a side of the first sealing structure remote from the axle axis.
In an alternative embodiment, the second sealing structure comprises a first sealing ring and a sealing pressing ring, the sealing pressing ring is fixed with the guide wheel, and the sealing pressing ring presses the first sealing ring on the guide wheel to block a gap at the matching surface of the guide wheel and the bearing seat.
In an alternative embodiment, the mating surfaces of the sealing ring and the first sealing ring are provided with a second sealing ring.
In an alternative embodiment, a groove is formed in one side, which is used for being attached to the sealing compression ring, of the first sealing ring, and the second sealing ring is arranged in the groove.
In an alternative embodiment, the guide wheel is provided with a protruding portion, a gap is formed between the protruding portion and the outer surface of the bearing seat, the first sealing ring is arranged at the gap, and the sealing compression ring is detachably mounted on the protruding portion.
In an alternative embodiment, the sealing collar is mounted to the boss by a bolt.
In an alternative embodiment, a sealing element is arranged between the outer circle of the bearing seat and the matching surface of the sealing compression ring.
The embodiment of the invention also provides an excavator, which comprises the guide wheel structure provided by any technical scheme of the invention.
Based on the technical scheme, the embodiment of the invention at least has the following technical effects:
according to the guide wheel structure provided by the technical scheme, the double-layer or multi-layer sealing structure for preventing lubricating oil leakage is arranged on the matching surface of the guide wheel and the bearing seat, when the sealing structure positioned at the upstream of the oil leakage direction fails or cannot completely prevent oil leakage, the sealing structure positioned at the downstream can further play a role in preventing oil leakage, multi-layer sealing can be realized, and the sealing element is convenient to detach and replace and convenient to maintain, so that the probability of oil leakage can be effectively reduced, the sealing reliability and the service life of the guide wheel structure are improved, the guide wheel structure has practicability, and can be popularized and applied to four-wheel belt train products such as an excavator.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a guide wheel structure according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of the area a in fig. 1.
FIG. 3 is a schematic view illustrating the assembly of the first seal ring and the second seal ring in FIG. 1
FIG. 4 is a schematic front view of the sealing ring of FIG. 1;
fig. 5 is a side view schematic of fig. 4.
Detailed Description
The technical scheme provided by the invention is described in more detail below with reference to fig. 1 to 5.
Referring to fig. 1, an embodiment of the present invention provides a guide wheel structure, which includes a guide wheel 1, an axle 2, and a bearing housing 3. The wheel axle 2 passes through the through holes 4 on the guide wheel 1 and the bearing seat 3, and a double-layer or multi-layer sealing structure for preventing lubricating oil leakage is arranged on the matching surface of the guide wheel 1 and the bearing seat 3.
Referring to fig. 1, bearing seats 3 are provided on both sides of a guide wheel 1, and both sides of the guide wheel 1 are attached to the bearing seats 3. The guide wheel 1 is matched with the joint surface of the bearing seat 3, and a multi-layer sealing structure is arranged at the joint surface to prevent the leakage of lubricating oil which is pre-placed in the product lubricating oil cavity. In this embodiment, the bearing seats 3 are provided on both sides of the guide wheel 1, so that sealing structures are provided on the mating surfaces of both sides of the guide wheel 1.
Referring to fig. 1, the guide wheel structure includes a guide wheel 1, a bearing housing 3, and an axle 2 passing through concentric holes in the guide wheel 1 and the bearing housing 3.
Referring to fig. 1, the sealing structure includes a first sealing structure 5, and the first sealing structure 5 includes a floating seal ring 51 and a floating rubber ring 52 provided in the lubricating oil chamber 6. The floating seal ring 51 and the floating rubber ring 52 are matched together to achieve the purpose of floating seal, and form a first layer of seal.
Referring to fig. 1, the guide wheel 1 and the bearing seat 3 are both provided with concave structures, and the two concave structures are spliced to form a lubricating oil cavity 6. This structure facilitates the installation of the first sealing structure 5.
Referring to fig. 1 and 2, further, the sealing structure further comprises a second sealing structure 7, the second sealing structure 7 being disposed on a side of the first sealing structure 5 remote from the axis of the wheel axle 2. The second sealing structure 7 is located downstream of the first sealing structure 5, and if the sealing at the first sealing structure 5 fails, the oil in the oil cavity 6 will be sealed by the second sealing structure 7, so that the second sealing structure 7 can play a role in sealing the second layer.
Referring to fig. 2, in this embodiment, the second sealing structure 7 includes a first sealing ring 71 and a sealing pressing ring 72, the sealing pressing ring 72 is fixed with the guide wheel 1, and the sealing pressing ring 72 presses the first sealing ring 71 on the guide wheel 1 to block a gap at the mating surface of the guide wheel 1 and the bearing seat 3.
The sealing compression ring 72 and the first sealing ring 71 are matched to form a second layer of sealing, so that the sealing performance of the guide wheel 1 is enhanced, and oil leakage of the guide wheel 1 is prevented.
Referring to fig. 1 and 2, the mating surfaces of the sealing ring 72 and the first seal ring 71 are provided with a second seal ring 73. The second seal ring 73 can play a sealing role to prevent oil from leaking from the mating surface of the seal ring 72 and the first seal ring 71.
Referring to fig. 2 and 3, a groove 74 is formed on a side of the first seal ring 71 for fitting the seal ring 72, and the second seal ring 73 is disposed in the groove 74. The cross-sectional shape of the groove 74 may be U-shaped.
It will be appreciated that the groove 74 may also be provided on the sealing collar 72, as may the seal. Specifically, the side surface of the sealing compression ring 72 is provided with a U-shaped ring groove, and the sealing effect of the sealing compression ring can be enhanced when the sealing compression ring is matched with the first sealing ring 71, so that the sealing effect of the second layer of sealing is enhanced.
Referring to fig. 2, the guide wheel 1 is provided with a boss, a gap is formed between the boss and the outer surface of the bearing seat 3, a first seal ring 71 is disposed at the gap, and a seal pressing ring 72 is detachably mounted on the boss.
Referring to fig. 2, in this embodiment, a sealing member 13, specifically an O-ring, is disposed between the outer circumference of the bearing housing 3 and the mating surface of the sealing ring 72. In this embodiment, the concave groove of the outer circle of the bearing seat 3 is provided with an O-ring, and the O-ring and the inner ring surface of the sealing compression ring 72 cooperate to form a third layer of seal, so that the sealing performance of the guide wheel 1 is further enhanced, and the guide wheel 1 is effectively prevented from leaking oil.
The invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the guide wheel structure includes a guide wheel 1, a wheel shaft 2, a bearing housing 3, a floating seal ring 52, a bushing 16, a floating seal ring 51, an O-ring 15, a cylindrical pin 14, a first seal ring 71, a third seal ring, a seal pressure ring 72, a bolt, and a second seal ring 73.
Referring to fig. 1, a bimetal bushing 16 is press-fitted in a through hole of a guide wheel 1, a wheel shaft 2 is mounted in the guide wheel, and the wheel shaft 2 is connected with left and right bearing seats 3 through interference fit and axially positioned through cylindrical pins 14. The bearing block 3 is then connected to the tensioning device by means of a screw connection. The space between the two ends of the guide wheel 1 and the left and right bearing seats 3 is called a floating seal chamber, wherein two pairs of floating seal rings 51 and floating seal rubber rings 52 are matched in the floating seal chamber.
Referring to fig. 1,O, the sealing rings 15 are placed in the concave grooves at both ends of the axle 2, between the outer circumferential surface of the axle 2 and the inner circumferential surface of the bearing housing 3, so that the leakage of lubricating oil from the gap between the axle 2 and the bearing housing 3 can be prevented.
Referring to fig. 2, the first seal ring 71 is placed in the annular gap between the bearing housing 3 and the guide wheel 1, and the second seal ring 73 is placed in the side groove 74 of the first seal ring 71. The sealing effect can be enhanced by the cooperation of the first sealing ring 71 and the second sealing ring 73, and meanwhile, the first sealing ring and the second sealing ring cooperate to form a second layer of sealing, so that the sealing performance of the guide wheel 1 is enhanced, and the guide wheel 1 is prevented from oil leakage.
Referring to fig. 1 and 2, the sealing ring 72 presses the first seal ring 71 and the second seal ring 73 into the annular gap between the bearing housing 3 and the guide wheel 1. One end face of the sealing pressing ring 72 is tightly contacted with the first sealing ring 71 and the second sealing ring 73 to form a second layer of sealing. Meanwhile, the inner annular surface of the sealing compression ring 72 is tightly contacted with the sealing piece 13 to form a third layer of sealing, so that the dual purposes of compact structure and strong sealing performance are realized. The sealing compression ring 72 is fixedly connected to the end face of the protruding portion of the guide wheel 1 through bolts, and installation and disassembly are convenient.
Referring to fig. 2, the seal 13 is placed in a groove 74 in the outer circumference of the bearing housing 3 and cooperates with the inner annular surface of the sealing collar 72 to form a third layer of seal. The sealing performance of the guide wheel 1 is further enhanced, oil leakage of the guide wheel 1 is effectively prevented, and the service life of the guide wheel 1 is further prolonged.
The embodiment of the invention also provides an excavator, which comprises the guide wheel structure provided by any technical scheme of the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The high-reliability guide wheel structure is characterized by comprising a guide wheel (1), a wheel shaft (2) and a bearing seat (3); the wheel shaft (2) passes through the through holes (4) on the guide wheel (1) and the bearing seat (3), and a double-layer or multi-layer sealing structure for preventing lubricating oil leakage is arranged on the matching surface of the guide wheel (1) and the bearing seat (3);
the sealing structure comprises a first sealing structure (5) and a second sealing structure (7); the second sealing structure (7) comprises a first sealing ring (71) and a sealing pressing ring (72), the sealing pressing ring (72) is fixed with the guide wheel (1), and the sealing pressing ring (72) tightly presses the first sealing ring (71) on the guide wheel (1) to block a gap at the matching surface of the guide wheel (1) and the bearing seat (3).
2. A guide wheel arrangement according to claim 1, characterized in that the first sealing arrangement (5) is arranged in a lubricating oil chamber (6).
3. The guide wheel structure according to claim 2, characterized in that the guide wheel (1) and the bearing seat (3) are both provided with a concave structure, and the two concave structures are spliced to form the lubricating oil cavity (6).
4. A guide wheel arrangement according to claim 2, characterized in that the second sealing arrangement (7) is arranged on the side of the first sealing arrangement (5) remote from the axle (2) axis.
5. The guide wheel structure according to claim 1, characterized in that the mating surfaces of the sealing pressure ring (72) and the first sealing ring (71) are provided with a second sealing ring (73).
6. The guide wheel structure according to claim 5, wherein a groove (74) is formed in one side of the first sealing ring (71) for fitting the sealing pressure ring (72), and the second sealing ring (73) is disposed in the groove (74).
7. The guide wheel structure according to claim 1, wherein the guide wheel (1) is provided with a protruding portion, a gap is formed between the protruding portion and the outer surface of the bearing seat (3), the first sealing ring (71) is arranged at the gap, and the sealing pressing ring (72) is detachably mounted on the protruding portion.
8. The guide wheel structure according to claim 7, wherein the sealing ring (72) is mounted to the boss by a bolt.
9. The guide wheel structure according to claim 1, characterized in that a sealing member (13) is provided between the outer circumference of the bearing housing (3) and the mating surface of the sealing pressure ring (72).
10. An excavator comprising a guide wheel structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711094040.7A CN107745754B (en) | 2017-11-09 | 2017-11-09 | High-reliability guide wheel structure and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711094040.7A CN107745754B (en) | 2017-11-09 | 2017-11-09 | High-reliability guide wheel structure and excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107745754A CN107745754A (en) | 2018-03-02 |
| CN107745754B true CN107745754B (en) | 2023-08-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711094040.7A Active CN107745754B (en) | 2017-11-09 | 2017-11-09 | High-reliability guide wheel structure and excavator |
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| CN (1) | CN107745754B (en) |
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Effective date of registration: 20190418 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant after: Jiangsu Xugong Construction Machinery Research Institute Co.,Ltd. Address before: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. |
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