CN104443091A - Supporting chain wheel for track-laying vehicle - Google Patents
Supporting chain wheel for track-laying vehicle Download PDFInfo
- Publication number
- CN104443091A CN104443091A CN201410713520.7A CN201410713520A CN104443091A CN 104443091 A CN104443091 A CN 104443091A CN 201410713520 A CN201410713520 A CN 201410713520A CN 104443091 A CN104443091 A CN 104443091A
- Authority
- CN
- China
- Prior art keywords
- main shaft
- sprocket wheel
- holder sprocket
- wheel body
- tracklaying vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- B62D55/14—Arrangement, location, or adaptation of rollers
- B62D55/15—Mounting devices, e.g. bushings, axles, bearings, sealings
-
- 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
- B62D55/092—Endless track units; Parts thereof with lubrication means
-
- 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
- B62D55/12—Arrangement, location, or adaptation of driving sprockets
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to a supporting chain wheel for a track-laying vehicle. The supporting chain wheel comprises a main shaft, a wheel body rotationally arranged on the outer peripheral wall of the main shaft and a bearing part for supporting the main shaft and the wheel body by an installation seat of a track beam of the vehicle. The bearing part comprises two end seats arranged on the two sides of the main shaft respectively. The two end seats provide the bearing effect for the main shaft at the two ends of the main shaft, and the end seats are matched with the ends of the main shaft through center holes formed in the end seats. Due to the fact that the supporting chain wheel provides the bearing effect for the main shaft at the two ends of the main shaft, the risks that the supporting chain wheel is deformed in the axis direction and is even broken due to single-end bearing can be effectively avoided, a track is well borne and more stably moves, and then the track-laying vehicle can more stably and safely run. Due to the fact that the supporting chain wheel is not prone to deformation and is longer in service life, the use and maintenance cost of the track-laying vehicle can be greatly reduced.
Description
Technical field
The present invention relates to a kind of support roller, particularly a kind of holder sprocket wheel crawler belt being provided to supporting for tracklaying vehicle.
Background technology
Below background of related of the present invention is described, but these explanations might not form prior art of the present invention.
Holder sprocket wheel is such as a vitals in the traveling gear of the tracklaying vehicle of excavating machine, and it is mainly used in holding up upper track, prevents upper track excessive sag, and supporting crawler belt is to ensure the normal operation of crawler belt.In addition, holder sprocket wheel is also the parts being easy to damage in tracklaying vehicle, and the general more complicated of the operating mode due to tracklaying vehicle requires also higher for holder sprocket arts.The complex structural designs of holder sprocket wheel of the prior art, general employing is fixed by the axle stretched out regularly from the mount pad of track beam, in use easily occurs that mount pad is torn because of vibration, and the problem such as holder sprocket wheel unbalance stress premature abrasion.In addition, owing to asking the inner structure of sprocket wheel complicated, cause its inner sealing not tight, there is the risk of oil leak, this will increase the operation and maintenance cost of the tracklaying vehicle adopting this holder sprocket wheel widely.
Therefore, need in prior art a kind ofly can guarantee safety in utilization and service life and the holder sprocket wheel for tracklaying vehicle of inner excellent sealing can be realized.
Summary of the invention
The object of the invention is to propose a kind of holder sprocket wheel for tracklaying vehicle of good sealing property that can prevent from being in use out of shape even fracture failure and internal lubrication oil oil circuit can be guaranteed.
According to embodiments of the invention, there is provided a kind of holder sprocket wheel for tracklaying vehicle, it comprises main shaft, is arranged on the wheel body on the periphery wall of main shaft and the support unit on the mount pad of track beam main shaft and wheel body being bearing in tracklaying vehicle rotatably.Described support unit comprises two of the both sides being separately positioned on main shaft end seats, with at the two ends of main shaft for main shaft provides supporting role, end seat is coordinated with the end of main shaft by the centre hole arranged wherein.Due to holder sprocket wheel according to the present invention at the two ends of main shaft for main shaft provides supporting, therefore, it is possible to effectively avoid the holder sprocket wheel caused due to single-ended supporting to be out of shape the risk even ruptured in the axial direction, thus provide good supporting for crawler belt, crawler belt is moved more reposefully, also just achieves the more steady and safe traveling of tracklaying vehicle thus.In addition, because holder sprocket wheel according to the present invention not easily produces distortion, therefore it will have longer service life, can reduce the operation and maintenance cost of tracklaying vehicle thus widely.
In an embodiment of the holder sprocket wheel for tracklaying vehicle according to the present invention, between the periphery wall and the internal perisporium of end seat of main shaft, be provided with grommet type seals.Lubricating oil space between main shaft and wheel body can be formed sealing by grommet type seals in the axial direction set between the periphery wall of main shaft and the internal perisporium of end seat, thus effectively stops lubricating oil leakage in the axial direction.
According to another embodiment of the holder sprocket wheel for tracklaying vehicle of the present invention, the end face contacted with wheel body of end seat is formed the first recess for holding sealing element, or is formed with the second recess for holding sealing element on the end face contacted with end seat of wheel body.
In another embodiment of the holder sprocket wheel for tracklaying vehicle according to the present invention, sealing element comprises float grease seal and float grease seal ring, and float grease seal is nested with in the outer peripheral edges of float grease seal ring.Realize the lubricating oil space sealing in radial directions between wheel body and main shaft by the sealing element be arranged in the first recess or the second recess, thus effectively stop lubricating oil leakage radially.The Assembled sealer of float grease seal and float grease seal ring can improve sealing effectiveness, prevents the leakage of lubricating oil.
According to another embodiment of the holder sprocket wheel for tracklaying vehicle of the present invention, in holder sprocket wheel, be provided with grease channel, grease channel comprises the first grease channel be arranged in main shaft, is arranged on the 3rd grease channel in wheel body and is communicated with the second grease channel of the first grease channel and the 3rd grease channel.
In an also embodiment of the holder sprocket wheel for tracklaying vehicle according to the present invention, in wheel body, be formed with circular groove, circular groove is for being communicated with the second grease channel and the 3rd grease channel.Further, circular groove can also play the interim effect storing lubricating oil, in the driving process of vehicle, lubricating oil is delivered to sealing element place.
According to another embodiment of the holder sprocket wheel for tracklaying vehicle of the present invention, be provided with the lubricating oil filler opening be communicated with the first grease channel in the end of main shaft.
In another embodiment of the holder sprocket wheel for tracklaying vehicle according to the present invention, between main shaft and wheel body, be provided with lining.By arranging the friction that lining can reduce between main shaft and wheel body widely, thus extend the service life of main shaft and wheel body.
According to another embodiment of the holder sprocket wheel for tracklaying vehicle of the present invention, main shaft is set together by pivot pin is relative regularly with any one in end seat.
In an also embodiment of the holder sprocket wheel for tracklaying vehicle according to the present invention, end seat is formed with mounting hole.By the mounting hole be formed on end seat, holder sprocket wheel is securely fixed on the mount pad of the track beam of tracklaying vehicle.
Accompanying drawing explanation
By the detailed description of the invention part provided referring to accompanying drawing, clearly the features and advantages of the present invention can be understood, in the accompanying drawings:
Fig. 1 is the cutaway view of the holder sprocket wheel illustrated according to the crawler belt for supporting tracklaying vehicle of the present invention;
Fig. 2 is the birds-eye view of the holder sprocket wheel illustrated according to the crawler belt for supporting tracklaying vehicle of the present invention; And
Fig. 3 is the block diagram of the holder sprocket wheel according to the crawler belt for supporting tracklaying vehicle of the present invention being in installation site.
Detailed description of the invention
With reference to the accompanying drawings illustrative embodiments of the present invention is described in detail.Be only for demonstration object to the description of illustrative embodiments, and be never the restriction to the present invention and application or usage.
Accompanying drawing 1 illustrate according to of the present invention such as excavating machine tracklaying vehicle in for supporting the cutaway view of the holder sprocket wheel 10 of crawler belt.Be described in detail referring to the concrete structure of accompanying drawing 1 to the holder sprocket wheel 10 for supporting crawler belt according to the present invention.Holder sprocket wheel 10 according to the present invention comprises main shaft 12 and is arranged on the wheel body 14 on the periphery wall of main shaft 12 rotatably.Main shaft 12 pairs of wheel bodys 14 play supporting role, and when wheel body 14 pairs of crawler belts support, in the driving process of tracklaying vehicle, wheel body 14 can rotate around main shaft 12, thus make to there is friction of rolling between wheel body 14 and crawler belt, the friction coefficient between crawler belt and the wheel body 14 supporting crawler belt can be reduced thus.Further, in order to reduce the friction force between wheel body 14 and main shaft 12, between wheel body 14 and main shaft 12, lining 16 is provided with.Lining 16 can be assembled together with wheel body 14 or with main shaft 12 with the form of interference fit, and with the another one bearing fit in main shaft 12 or wheel body 14 assemble, thus form bearing fit between wheel body 14 and main shaft 12.
In order to be fixedly mounted on the mount pad of track beam by holder sprocket wheel 10, be respectively arranged with end seat 18 at the two ends of holder sprocket wheel 10.End seat 18 is separately positioned on the two ends of main shaft 12, and holds seat 18 to be set together regularly by pivot pin 20 is relative with main shaft 12.Thus, when being fixed on the mount pad of track beam by end seat 18, main shaft 12 is also arranged on mount pad relatively regularly, and can not produce motion relative to mount pad.As shown in Figure 1, end seat 18 is arranged to the centre hole 182 be in axial direction formed with for holding main shaft 12, and the first radial hole 184 that the radial direction being formed with centrally hole 182 in the circle wall of end seat 18 extends.In main shaft 12, be formed with the second radial hole 122 that the radial direction along main shaft 12 extends simultaneously.When end seat 18 is assembled on the end of main shaft 12, the first radial hole 184 on end seat 18 is radially aimed at the second radial hole 122 in main shaft 12, thus can by through the first radial hole 184 and the second radial hole 122 pivot pin 20 by main shaft 12 with hold together with seat 18 is fixedly fitted to.
In addition, accompanying drawing 2 illustrates the birds-eye view according to holder sprocket wheel 10 of the present invention, and each end seat 18 of holder sprocket wheel 10 is provided with mounting hole 186, bolt can be utilized to be fixed on the mount pad of track beam by end seat 18 by mounting hole 186.Advantageously, each end seat 18 is provided with two mounting holes 186, as shown in Figure 2.Holder sprocket wheel 10 can be arranged on the mount pad 32 of track beam by four bolts 30, as shown in Figure 3.The upper part of endless track is supported by holder sprocket wheel 10, thus in the driving process of tracklaying vehicle, prevents crawler belt sagging and deform, and makes the traveling of vehicle more stable thus.In addition, due to end seat 18 the support sprocket wheels 10 by being positioned at holder sprocket wheel 10 both sides, the main shaft therefore preventing one-way support to bring easily is out of shape the risk even ruptured.
Further, the surface contacted with wheel body 14 of end seat 18 is provided with the first recess 188 for accommodating sealing element, first recess 188 is formed as annular around the axis of centre hole 182, after thus in the centre hole 182 main shaft 12 being assembled to end seat 18, the sealing element be arranged in the first recess 188 can along the circumferential direction seal main shaft 12.Similarly, the position corresponding with the first recess 188 on end seat 18 of wheel body 14 is provided with the second recess 142 for accommodating sealing element.That is, the surface contacted with end seat 18 of wheel body 14 is provided with the second recess 142 for accommodating sealing element.Similar with the first recess 188 of end seat 18, the second recess 142 of wheel body 14 becomes annular around its center shaft is linear.Thus, the sealing element be arranged in the first recess 188 can cooperatively interact with the sealing element be arranged in the second recess 142, thus seal more closely for main shaft 12 provides.
As shown in Figure 1, advantageously, the assembly set of float grease seal 22 and float grease seal ring 24 is adopted according to sealing element of the present invention.Float grease seal 22 and float grease seal ring 24 can be set in the first recess 188 of end seat 18, now can first float grease seal 22 and float grease seal ring 24 be fitted together, such as float grease seal 22 is nested with in the outside of float grease seal ring 24, then the float grease seal 22 combined and float grease seal ring 24 is loaded in the first recess 188 of end seat 18.Similarly, float grease seal 22 and float grease seal ring 24 can be set in the second recess 142 of wheel body 14, first float grease seal 22 and float grease seal ring 24 can be fitted together at this, then the float grease seal 22 combined and float grease seal ring 24 are loaded in the second recess 142 of wheel body 14.In the embodiment according to Fig. 1, on the surface of end seat 18 and the first recess 188 and the second recess 142 of being respectively arranged with on the surface of wheel body 14 for accommodating float grease seal 22 and float grease seal ring 24, but, first recess 188 or the second recess 142 also can be only set, and float grease seal 22 and float grease seal ring 24 are set in the first recess 188 or the second recess 142, be arranged on the surface of float grease seal 22 in the first recess 188 or the second recess 142 and float grease seal ring 24 one corresponding thereto directly in abutment end seat 18 and wheel body 14.Also the sealing between wheel body 14 and main shaft 12 can be formed thus.
In addition, in order to provide good lubrication to the lining 16 between wheel body 14 and main shaft 12 and in order to provide good sealing to the float grease seal 22 in the first recess 188 and the second recess 142 and float grease seal ring 24, the inside of holder sprocket wheel 10 be provided with the grease channel for making lubricating oil pass through.As shown in Figure 1, the first grease channel 124 that the axis direction along main shaft 12 extends is offered at the center of main shaft 12, and be formed with the lubricating oil filler opening 128 of the end face extending to main shaft 12 in the end of the first grease channel 124, lubricant gun can be utilized at lubricating oil filler opening 128 place, lubricating oil to be injected into the inside of holder sprocket wheel 10.Further, in order to lubricating oil being incorporated into bearing fit place between wheel body 14 and main shaft 12 and float grease seal 22 and float grease seal ring 24 place, the center of wheel body 14 is provided with circular groove 144, and in main shaft 12, is provided with the second grease channel 126 that the first grease channel 124 is communicated with circular groove 144 fluid.In the embodiment shown in Fig. 1 according to the present invention, the second grease channel 126 is arranged perpendicular to the first grease channel 124.Lubricating oil by being formed in the first grease channel 124 in main shaft 12 and the second grease channel 126 flows in the circular groove 144 be formed in wheel body 14, thus can form lubricant film between wheel body 14 and main shaft 12.In addition, the 3rd grease channel 146 leading to float grease seal 22 and float grease seal ring 24 from circular groove 144 is formed in wheel body 14, the lubricating oil be stored in circular groove 144 can guide to float grease seal 22 and float grease seal ring 24 by the 3rd grease channel 146, thus provides oil-tightening effect to float grease seal 22 and float grease seal ring 24.
Further, in order to ensure the excellent sealing of the lubricating oil between main shaft 12 and wheel body 14, between the internal perisporium and the periphery wall of main shaft 12 of end seat 18, be provided with grommet type seals 26.Grommet type seals 26 is arranged on the outside of the relative rotation portions between wheel body 14 and main shaft 12, thus is sealed in enclosure space by relative rotation portions.As shown in Figure 1, the outer wall of main shaft 12 is provided with three grommet type sealss 26, wherein two grommet type sealss 26 are arranged on the outside of the both sides of lining 16, and a grommet type seals 26 is arranged on the position of lubricating oil filler opening 128.
Advantageously, wheel body 14 can be arranged to the form of two halfbodies, two halfbodies form whole wheel body 14 by the form of welding.Wheel body 14 is designed to the form of two halfbodies, difficulty of processing can be reduced in the manufacturing process of wheel body 14, thus reduce the manufacturing cost of wheel body 14.Certainly, it will be appreciated by persons skilled in the art that the present invention also can adopt the wheel body 14 of integral type.
In an embodiment according to the present invention, because holder sprocket wheel 10 have employed the end seat 18 being arranged on its two ends, therefore it can be bearing on the mount pad of track beam securely, avoids the risk causing the bending of main shaft or fracture due to cantilever support during single-ended supporting.Further, adopt the crawler belt of the tracklaying vehicle of this holder sprocket wheel 10 to move more reposefully, thus tracklaying vehicle is moved more reposefully.Further, by being arranged on the sealing element between main shaft 12 and end seat 18, i.e. grommet type seals 26, can seal the axial direction of the lubricating oil space between main shaft 12 and wheel body 14 along main shaft 12.In addition, also by other sealing element, i.e. float grease seal 22 and float grease seal ring 24, seals the radial direction of the lubricating oil space between main shaft 12 and wheel body 14 along main shaft 12.Thus, between main shaft 12 and wheel body 14, define hermetic space, thus prevented the leakage of lubricating oil wherein, be conducive to the use amount reducing lubricating oil, thus save the operating cost of tracklaying vehicle.
Holder chain sprocket structure for tracklaying vehicle according to the present invention is compact, convenient for installation and maintenance, and together with the use of float grease seal, float grease seal ring and three grommet type sealss can reach good sealing property, avoid grease to reveal better, and its long service life, productive costs are low and be suitable for applying on a large scale.Welding in addition between all parts is all adopt friction welding, and the process ratio of weld seam is easier to, and the connection of each parts is also compact.In addition, wheel body material can be changed or wheel body material is better processed, to meet the severe working environment of excavating machine, improving its resistance to abrasion and withstanding corrosion, the performance such as antirust.
Although with reference to illustrative embodiments, invention has been described, but be to be understood that, the present invention is not limited in literary composition the detailed description of the invention described in detail and illustrate, when not departing from claims limited range, those skilled in the art can make various change to described illustrative embodiments.
Claims (10)
1. the holder sprocket wheel for tracklaying vehicle, comprising main shaft (12), being arranged on wheel body (14) on the periphery wall of described main shaft (12) rotatably and for described main shaft (12) and described wheel body (14) being bearing in the support unit on the mount pad of the track beam of described tracklaying vehicle
It is characterized in that, described support unit comprises two ends seat (18) of the both sides being separately positioned on described main shaft (12), to be that described main shaft (12) provides supporting role at the two ends of described main shaft (12), described end seat (18) is coordinated with the end of described main shaft (12) by the centre hole (182) arranged wherein.
2. the holder sprocket wheel for tracklaying vehicle according to claim 1, wherein, is provided with grommet type seals (26) between the periphery wall and the internal perisporium of described end seat (18) of described main shaft (12).
3. the holder sprocket wheel for tracklaying vehicle according to claim 1 and 2, wherein, the end face contacted with described wheel body (14) of described end seat (18) is formed the first recess (188) for holding sealing element, or is formed with the second recess (142) for holding sealing element on the end face contacted with described end seat (18) of described wheel body (14).
4. the holder sprocket wheel for tracklaying vehicle according to claim 3, wherein, described sealing element comprises float grease seal (22) and float grease seal ring (24), and described float grease seal (22) is nested with in the outer peripheral edges of described float grease seal ring (24).
5. the holder sprocket wheel for tracklaying vehicle according to claim 4, wherein, in described holder sprocket wheel (10), be provided with grease channel, described grease channel comprises the first grease channel (124) be arranged in described main shaft (12), is arranged on the 3rd grease channel (146) in described wheel body (14) and is communicated with second grease channel (126) of described first grease channel (124) and described 3rd grease channel (146).
6. the holder sprocket wheel for tracklaying vehicle according to claim 5, wherein, in described wheel body (14), be formed with circular groove (124), described circular groove (124) is for being communicated with described second grease channel (126) and described 3rd grease channel (146).
7. the holder sprocket wheel for tracklaying vehicle according to claim 6, wherein, is provided with the lubricating oil filler opening (128) be communicated with described first grease channel (124) in the end of described main shaft (12).
8. the holder sprocket wheel for tracklaying vehicle according to claim 1 and 2, wherein, is provided with lining (16) between described main shaft (12) and described wheel body (14).
9. the holder sprocket wheel for tracklaying vehicle according to claim 1 and 2, wherein, described main shaft (12) is set together by pivot pin (20) is relative regularly with any one in described end seat (18).
10. the holder sprocket wheel for tracklaying vehicle according to claim 1 and 2, wherein, described end seat (18) is formed with mounting hole (186).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713520.7A CN104443091A (en) | 2014-11-28 | 2014-11-28 | Supporting chain wheel for track-laying vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713520.7A CN104443091A (en) | 2014-11-28 | 2014-11-28 | Supporting chain wheel for track-laying vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104443091A true CN104443091A (en) | 2015-03-25 |
Family
ID=52890029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410713520.7A Pending CN104443091A (en) | 2014-11-28 | 2014-11-28 | Supporting chain wheel for track-laying vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104443091A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745754A (en) * | 2017-11-09 | 2018-03-02 | 徐工集团工程机械有限公司 | High reliability wheel design and excavator |
| CN111645770A (en) * | 2020-06-28 | 2020-09-11 | 力士德工程机械股份有限公司 | Excavator drag sprocket and mount pad structure assembly |
| CN112977657A (en) * | 2021-04-21 | 2021-06-18 | 三一重机有限公司 | Thrust wheel shaft, thrust wheel and operation machine |
| CN113428247A (en) * | 2017-06-26 | 2021-09-24 | 卡特彼勒公司 | Convex petal type track pin |
| CN113682389A (en) * | 2021-09-23 | 2021-11-23 | 三一重机有限公司 | Thrust wheel and engineering machinery |
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| JP2000211561A (en) * | 1999-01-25 | 2000-08-02 | Hitachi Constr Mach Co Ltd | Roller device for tracked vehicle |
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| CN103253311A (en) * | 2013-05-17 | 2013-08-21 | 泉州市盛德机械发展有限公司 | Structure improvement of supporting chain wheel assembly of crawler type excavator |
| CN203740008U (en) * | 2014-03-09 | 2014-07-30 | 济宁金牛重工有限公司 | Supporting wheel shaft with oil chamber at axis part |
| CN204355183U (en) * | 2014-11-28 | 2015-05-27 | 中联重机股份有限公司 | For the holder sprocket wheel of tracklaying vehicle |
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| JPS57205280A (en) * | 1981-06-13 | 1982-12-16 | Hitachi Constr Mach Co Ltd | Upper shaft sleeve device for crawler vehicle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113428247A (en) * | 2017-06-26 | 2021-09-24 | 卡特彼勒公司 | Convex petal type track pin |
| CN107745754A (en) * | 2017-11-09 | 2018-03-02 | 徐工集团工程机械有限公司 | High reliability wheel design and excavator |
| CN107745754B (en) * | 2017-11-09 | 2023-08-01 | 江苏徐工工程机械研究院有限公司 | High-reliability guide wheel structure and excavator |
| CN111645770A (en) * | 2020-06-28 | 2020-09-11 | 力士德工程机械股份有限公司 | Excavator drag sprocket and mount pad structure assembly |
| CN112977657A (en) * | 2021-04-21 | 2021-06-18 | 三一重机有限公司 | Thrust wheel shaft, thrust wheel and operation machine |
| CN112977657B (en) * | 2021-04-21 | 2022-05-03 | 三一重机有限公司 | Thrust wheel shaft, thrust wheel and operation machine |
| CN113682389A (en) * | 2021-09-23 | 2021-11-23 | 三一重机有限公司 | Thrust wheel and engineering machinery |
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Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |