CN105484304B - A kind of spading system and the land leveller for including the spading system - Google Patents
A kind of spading system and the land leveller for including the spading system Download PDFInfo
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- CN105484304B CN105484304B CN201410468562.9A CN201410468562A CN105484304B CN 105484304 B CN105484304 B CN 105484304B CN 201410468562 A CN201410468562 A CN 201410468562A CN 105484304 B CN105484304 B CN 105484304B
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Abstract
The present invention relates to a kind of spading systems, including hitch frame, turbine box, swing mechanism, holder and spade blade device, the swing mechanism and the spade blade device are connect with the holder, the turbine box is arranged on the hitch frame, to drive the swing mechanism to be turned round relative to the hitch frame；The spade blade device includes perching knife structure, and the arc radius on the tactile native surface of the perching knife structure from top to bottom gradually increases, and can reduce the stress of the spading resistance and spading blade of spading system.The present invention also provides a kind of land leveller including above-mentioned spading system, can significantly improve the spading power of land leveller.
Description
Technical field
The present invention relates to engineering machinery field, especially a kind of spading system and the land leveller for including the spading system.
Background technology
Land leveller be it is a kind of be equipped with based on spading system, be equipped with other a variety of interchangeable apparatus for work, carry out soil shovel
Pick, smooth and plastic operation shovel soil transport construction machinery.Land leveller is mainly used in the big face such as road, airport, farmland, water conservancy
Accumulate land smoothing operation and scrape slope, ditching, bulldoze, loosen the soil, remove ice and snow on road surfaces etc. construction operation, is defence engineering, hands over
One of important equipment logical, in Water Capital Construction construction.
Spading system is direct work system in land leveller, the tactile native surface of its spading system under identical operation posture
The quality of shape directly affects the spading performance of land leveller, such as：The power performance of spading resistance, blade service life and system
Deng.In the case where operation medium is certain, horizontal resistance suffered by the perching knife of spading system is completely by the tactile native surface texture of perching knife
It is codetermined with the operating parameter of system；The service life of shovel blade depends on its stress size and the wearability of its own,
Wherein the size of resultant force suffered by shovel blade is directly determined by the shape on the tactile native surface of perching knife；The power performance of land leveller then by
The adhesive force for the maximum power and grader tire that dynamical system is capable of providing codetermines, though the tactile native surface shape of perching knife
The maximum power that system is capable of providing can not so be changed, but active force is bigger straight down suffered by perching knife, engineering machinery
Normal pressure between tire and spading ground is bigger, and under the conditions of same friction, the adhesive force of tire is bigger, and land leveller moves
Power performance plays more abundant, so the power performance for system also has a certain impact.Practice have shown that perching knife structure design
It is unreasonable and spading resistance of the engineering machinery in operation bigger than normal, shovel blade serious wear, tire normal pressure can be caused small, it is attached
Put forth effort it is small, so lead to problems such as tire be easy skid.
It is most commonly seen in the prior art there is also this technical problem of face to the improved technical solution of perching knife system
It is that radius of the radian remains constant circular arc that perching knife, which touches native surface shape,.In addition, authorized and application No. is
The curved-surface structure of ejector dozer is optimized for by a kind of 201020691008.4 utility model patent " Curved bulldozing plate for bulldozer "
Parabolic shaped structure.But in the case where perching knife touches native surface arcuate structure chord length and remains unchanged, arc-shaped perching knife can not be same
When ensure small initial angle of penetration, big normal pressure straight down and good performance of digging, although processing and manufacturing is simpler
It is single, but spading performance is poor.
For this problem, authorizes and application No. is the parabolics that 201020691008.4 utility model patent is proposed
Linear structure, ejector dozer upper and lower part arcuate structure radius of curvature is big, middle section radius of curvature is small.But this design side
Formula leads to that the initial angle of penetration of ejector dozer lower part is larger, medium active force straight down is small, to have larger spading
Resistance and spading blade stress, the spading of land leveller are short of power, therefore the spading ability improvement of system is limited.
Invention content
The present invention provides a kind of spading system and includes the land leveller of the spading system, can reduce the spading of spading system
The stress of resistance and spading blade, and the spading power of land leveller can be significantly improved.
The present invention provides a kind of spading system, including hitch frame, turbine box, swing mechanism, holder and spade blade device, institute
It states swing mechanism and the spade blade device is connect with the holder, the turbine box is arranged on the hitch frame, with driving
The swing mechanism is turned round relative to the hitch frame；The spade blade device includes perching knife structure, and the perching knife structure
The arc radius on tactile native surface from top to bottom gradually increase.
Further, the tactile native surface of the perching knife structure is involute-type structure.
Further, the spade blade device further includes support plate, connecting plate and reinforcing plate, wherein described connecting plate one end with
The support plate connection, the other end of the connecting plate are connect with the reinforcing plate, and the perching knife structure is connected to the reinforcement
On plate.
Further, when the spade blade device operation attitude angle of the spade blade device is 0 degree, perching knife structure angle of penetration is
15-30 degree, wherein the spade blade device operation attitude angle is the angle of the upper surface and horizontal plane of the support plate, described
Perching knife structure angle of penetration is the angle of the tangent line and horizontal direction of perching knife structure bottom arcuate structure.
Further, when the spade blade device operation attitude angle of the spade blade device is 0 degree, perching knife structure angle of digging is
10-35 degree, wherein the spade blade device operation attitude angle is the angle of the upper surface and horizontal plane of the support plate, described
Perching knife structure dig angle be perching knife structure the top arcuate structure tangent line and horizontal direction angle.
Further, further include angle position device and perching knife gesture stability oil cylinder, the angle position device is articulated in described by axis pin
On holder, one end of the perching knife gesture stability oil cylinder is connected on the holder, and the other end is connect with angle position device, to
Can pilot angle position device turned round around the axis pin；The support plate of the spade blade device is connect with angle position device.
Further, angle position utensil has sliding slot, and side has sliding part, the support plate logical to the support plate up and down
Cross the sliding part be embedded in the sliding slot and can relative to the angle position device lateral sliding.
Further, the spading system further includes the lateral sliding connecting plate being connect with the support plate, described lateral
Sliding connection plate is connect with the one end for the perching knife lateral sliding control cylinder being set on the holder, described so as to control
Spade blade device is relative to angle position device lateral sliding.
Further, the perching knife structure includes shovel blade and perching knife arc plate, and the perching knife arc plate is connected to described add
On strong plate, the shovel blade is connected on the perching knife arc plate.
Further, the end of the turbine box includes cylindrical external gear, and the swing mechanism includes ring gear, described outer
Gear forms gear with the ring gear and engages, and turbine box drives the swing mechanism to realize revolution by gear engagement.
The present invention also provides a kind of land levellers comprising spading system as described above.
Beneficial effects of the present invention are as follows：
Since under identical perching knife operation posture, shovel blade angle of penetration is smaller, the spading resistance of system is smaller, perching knife
Blade stress is smaller, and active force is bigger straight down suffered by perching knife, and the frictional force between grader tire and ground is bigger, and spading is dynamic
Power is stronger；In identical perching knife operation posture and identical blade angle of penetration, the tactile native surface of perching knife, the radius of the radian of lower part
Bigger, spading resistance is smaller, and active force is bigger straight down suffered by perching knife, and the synthesis spading performance of system is better；In identical item
Under part, for perching knife touches native surface superstructure, suitably reduce its radius of the radian so that angle of digging is maintained at must
In range, although the spading resistance of system can slightly increased, soil particle overturning ability and mobility can enhance, and have
Conducive to system spading process be carried out continuously and system spading casting.Therefore, top radius of the radian is small, lower part radius of the radian is big
Involute-type perching knife touches native surface texture and disclosure satisfy that above-mentioned requirements, is optimal tactile native surface shape, can be protected under the same terms
Original performance of digging is held, spading resistance is reduced, reduces the stress of spading blade, the spading power of land leveller can be significantly improved.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows an embodiment of spading system of the present invention.
Fig. 2 shows the spade blade devices of an embodiment of spading system of the present invention.
Fig. 3 shows the operation attitude angle of the spade blade device of an embodiment of spading system of the present invention.
Fig. 4 shows tactile native curved surface of the spade blade device of an embodiment of spading system of the present invention under 0 degree of attitude angle
Force Distribution schematic diagram.
Fig. 5 A show the radius of the tactile native surface texture of the spade blade device of conventional spading system.
Fig. 5 B show the radius of the tactile native surface texture of the spade blade device of one embodiment of spading system of the present invention.
Fig. 6 shows the achievable movement of spade blade device of one embodiment of spading system of the present invention.
Specific implementation mode
Below by drawings and examples, technical solution of the present invention is described in further detail.
In conjunction with Fig. 1 and 2, the spading system of the present embodiment is illustrated in further detail.The spading system of the present embodiment
System includes hitch frame 1, swing mechanism 2, turbine box 3, holder 4 and spade blade device 5, swing mechanism 2 and spade blade device 5 with branch
Frame 4 connects, and turbine box 3 is arranged on hitch frame 1, to drive the swing mechanism 2 to be turned round relative to hitch frame 1.Turbine
The end of case 3 includes cylindrical external gear, and swing mechanism 2 includes ring gear, which forms gear with the ring gear and engage,
Turbine box 3 drives the swing mechanism 2 to realize revolution by gear engagement.Usually for the purpose of safety, position-limit mechanism is set
10 limit the revolution amplitude of swing mechanism 2, the position of position-limit mechanism 10 can be arranged according to the needs of actual condition.
Spade blade device 5 includes perching knife structure, in the present embodiment, to the arc radius on the tactile native surface of the perching knife structure into
It has gone and has distinguishingly provided.The setting mechanism of the tactile native surface arc radius of the present invention is further elaborated below.
We combine Fig. 2 and Fig. 3 first, are once illustrated several key parameters of spading process：Usual spading mistake
Cheng Zhong, the angle of penetration θ of shovel blade, dig angle [alpha] and the operation attitude angle of perching knifeFor common several crucial ginsengs
Number.As shown in figure 4, the angle of penetration θ of shovel blade refers to the tangent line and horizontal direction of 14 bottom arcuate structure of shovel blade
Angle, physical significance be perching knife bottom with great wedge angle spading operation medium；The angle [alpha] of digging of perching knife refers to
The angle of perching knife arcuate structure 15 the top arcuate structure tangent line and horizontal direction is worth and smaller shows that the performance of digging of perching knife is got over
It is good；As shown in figure 3, spade blade device operation attitude angleRefer to 11 upper surface of support plate and horizontal direction in spade blade device
Angle reflects the spading posture under the control of perching knife gesture stability oil cylinder.
Usually, if spading resistance is (i.e. suffered by perching knife：The horizontal resistance of operation medium) smaller, the spading effect of system
Rate is higher；And under identical operation posture, operation medium react on the active force straight down on perching knife it is bigger (when vertically to
Lower active force shows that vertical force direction is upward when being negative), the vertical normal pressure between grader tire and ground is bigger, wheel
The adhesive force of tire is bigger, and the power performance of system is (i.e.：It is not susceptible to skid) it is stronger.In order to improve the synthesis spading of system
Can, applicant has carried out comprehensive research to the microcosmic and macroscopical operation mechanism of land leveller spading process, and result of study shows：
1, in identical spade blade device operation attitude angleUnder, shovel blade angle of penetration θ is smaller, the spading resistance of system
It is smaller, shovel blade stress is smaller, active force is bigger straight down suffered by perching knife, and the frictional force between grader tire and ground is got over
Greatly, spading power is stronger；
2, in identical spade blade device operation attitude angleAnd in the case of identical blade angle of penetration θ, perching knife touches native table
In face, lower part radius of the radian it is bigger, spading resistance is smaller, and active force is bigger straight down suffered by perching knife, the synthesis spading of system
Performance is better；
3, under the same conditions, for perching knife touches native surface superstructure, suitably reduce its radius of the radian so that turn over
Native angle [alpha] is maintained at must be in range, although the spading resistance of system can slightly increased, and soil particle overturns energy
Power and mobility can enhance, be conducive to system spading process be carried out continuously and system spading casting.
By above analysis result it is found that the involute-type perching knife that top radius of the radian is small, lower part radius of the radian is big touches soil
Surface texture disclosure satisfy that above-mentioned requirements, for optimal tactile native surface shape.
In the present embodiment, spade blade device operation attitude angleCan -8 degree to 37 degree in the range of consecutive variations, and
The angle of penetration θ of shovel blade, the angle [alpha] also respective change therewith of digging of perching knife.When carrying out extensive shovel soil operation, generally
The attitude angle for choosing perching knife is -5 degree left and right；And when carrying out the leveling operation of soil, the general attitude angle for choosing perching knife
It is 35 degree or so.The native operation soil-shifting amount of shovel is more, and main purpose is to realize the extensive transfer of soil, for the spading of land leveller
Performance is higher, but scraping process soil-shifting amount is less, and main purpose is to fill up the low-lying place of pit using soil outstanding, so shovel
Native operation is for the requirement highest of land leveller spading performance, that is, the spading operating mode of system is the most severe in 9 degree of postures.It is shoveling
In the entire variation range of knife system operation attitude angle, three kinds of typical postures are chosen：- 5 degree, 15 degree and 35 degree, utilization is discrete
Elements method carries out dynamic simulation analysis, stress of the spade blade device under 0 degree of attitude angle point to the spading process of grader
Cloth rule is as shown in Figure 4, is found by simulation comparison：
1, in identical spade blade device operation attitude angleUnder, shovel blade angle of penetration is smaller, the spading resistance of system
It is smaller, shovel blade stress is smaller, active force is bigger straight down suffered by perching knife, and the frictional force between grader tire and ground is got over
Greatly, spading power is stronger；
2, in identical spade blade device operation attitude angleAnd in the case of identical blade angle of penetration θ, perching knife touches native surface
In, lower part radius of the radian it is bigger, spading resistance is smaller, and active force is bigger straight down suffered by perching knife, the synthesis spading of system
It can be better；
3, under the same conditions, for perching knife touches native surface superstructure, suitably reduce its radius of the radian so that turn over
Native angle [alpha] is maintained at must be in range, although the spading resistance of system can slightly increased, and soil particle overturns energy
Power and mobility can enhance, be conducive to system spading process be carried out continuously and system spading casting.
By above analysis result it is found that the involute-type perching knife that top radius of the radian is small, lower part radius of the radian is big touches soil
Surface texture disclosure satisfy that above-mentioned requirements, for optimal tactile native surface shape, as shown in Figure 5 A and 5B, for original structure perching knife, by
The radius that native curved surface is touched up to lower perching knife is equal always, i.e.,：R1=R2=R3=R4；And for optimizing perching knife, from top to bottom perching knife
The radius for touching soil curved surface gradually increases, i.e.,：R'1<R'2<R'3<R'4<R'5。
Trial-production experimental prototype, and under the same conditions (including：Identical operation medium, same host, same operation posture with
And same operation parameter), former perching knife and the spading Experimental Comparison for optimizing perching knife are tested, experimental test result is as follows：
1, after optimizing, the performance of digging of perching knife is uninfluenced；
2, under different operating modes, optimizing the more former perching knife of spading resistance suffered by perching knife reduces 10%-14%；
3, under different operating modes, optimize the vertical more former perching knife of active force suffered by perching knife and increase 6100N-19400N downwards；
4, under different operating modes, the limit operating range for optimizing perching knife (starts since land leveller up to the generation of its tire is beaten
Sliding travelled distance, the distance be spading resistance reduce, the increased resultant effect of system dynamic) more former perching knife increase 17%-
28%；
5, after optimizing, shovel blade stress reduces by 8%.
Therefore, the arc radius on the tactile native surface of the perching knife structure in the present embodiment takes the knot from top to bottom gradually increased
Structure, so that spading performance further increases.Specifically, the tactile native surface of the perching knife structure in the present embodiment may be configured as gradually opening
Linear structure may be alternatively provided as the arcuate structure of segmentation, from top to bottom be gradually increased as long as meeting arc radius.
The structure of the present invention is expanded on further in conjunction with attached drawing below.As shown in Fig. 2, the spade blade device further includes branch
Fagging 11, connecting plate 13 and reinforcing plate 16, wherein 13 one end of connecting plate are connect with support plate 11, the other end of connecting plate 13 with plus
Strong plate 16 connects, and perching knife structure is connected in the reinforcing plate 16.The perching knife structure includes shovel blade 14 and circular arc type perching knife
Arc plate 15.Perching knife arc plate 15 is connected in reinforcing plate 16, and shovel blade 14 is connected on perching knife arc plate 15.
When the spade blade device operation attitude angle of spade blade device is 0 degree, perching knife structure angle of penetration is 15-30 degree；When
When spade blade device operation attitude angle is 0 degree, perching knife structure digs angle as 10-35 degree.
As shown in Figure 1, in order to make the variable-angle of above-mentioned spade blade device, the spading system of the present embodiment further includes angle position device
6 and perching knife gesture stability oil cylinder 8, angle position device 6 is articulated in by axis pin 7 on holder 4, and one end of perching knife gesture stability oil cylinder 8 connects
It is connected on holder 4, the other end is connect with angle position device 6, is turned round around axis pin 7 so as to pilot angle position device 6；The support of spade blade device
Plate 11 is connect with angle position device 6.In addition, usually due to safety concerns, can perching knife posture position-limit mechanism 9 be set on the device 6 of angle position, with
The rotation angle of limit angles position device 6, overturns to control spade blade device in safe range.
As shown in Fig. 1, Fig. 2 and Fig. 6, in order to keep above-mentioned spade blade device lateral position variable, there is sliding slot on the device 6 of angle position,
About 11 side of the support plate have sliding part 11 ', support plate 11 be embedded in the sliding slot by the sliding part 11 ' and
It can be relative to angle position 6 lateral sliding of device.
To realize the lateral sliding, spading system further includes the lateral sliding connecting plate 12 being connect with support plate 11, institute
Lateral sliding connecting plate 12 is stated to connect with the one end for the perching knife lateral sliding control cylinder being set on such as holder 4, so as to
The spade blade device is enough controlled relative to angle position device lateral sliding.As shown in Figure 6, therefore, the spading system of the present embodiment
Revolution, front and back overturning and lateral sliding can be realized, to adapt to the needs of different operating modes.
The present embodiment also provides a kind of land leveller comprising spading system as described above.
Experiment shows：Spading system in the present embodiment has the following advantages that：
1, spading resistance is small：Under different operating modes, optimizing the more former perching knife of spading resistance suffered by perching knife reduces 10%-14%；
2, shovel blade stress is small：After optimization, shovel blade stress reduces by 8%, and then alleviates the abrasion of shovel blade,
Substantially increase its service life；
3, system dynamic is strong：Using existing land leveller as working host, different structure perching knife is hung, spading performance is passed through
Experiment can obtain：Under different operating modes, the more former perching knife of active force straight down for optimizing soil suffered by perching knife increases 6100N-
19400N accounts for the 4%-12% of existing land leveller main screw lift so that the normal pressure between grader tire and soil surface is significantly
Increase, so that the Adhesion enhancement of tire, the power that system is capable of providing is stronger；
4, soil good fluidity：By optimizing in perching knife, the arcuate structure on top so that the rolling effect of soil particle is big
For enhancing, the mobile performance of system is substantially increased；
5, comprehensive spading performance is strong：Under different operating modes, the limit operating range for optimizing perching knife (starts straight since land leveller
Travelled distance of skidding occurs to its tire, which is the reduction of spading resistance, the increased resultant effect of system dynamic) it is more former
Perching knife increases 17%-28%.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (11)
1. a kind of spading system of land leveller, which is characterized in that including hitch frame, turbine box, swing mechanism, holder and perching knife
Device, the swing mechanism and the spade blade device are connect with the holder, and the turbine box is arranged on the hitch frame,
To drive the swing mechanism to be turned round relative to the hitch frame；The spade blade device includes perching knife structure, and the shovel
The arc radius on the tactile native surface of knife structure from top to bottom gradually increases.
2. the spading system of land leveller as described in claim 1, which is characterized in that the tactile native surface of the perching knife structure is gradually
Open linear structure.
3. the spading system of land leveller as described in claim 1, which is characterized in that the spade blade device further include support plate,
Connecting plate and reinforcing plate, wherein described connecting plate one end is connect with the support plate, the other end of the connecting plate adds with described
Strong plate connection, the perching knife structure are connected in the reinforcing plate.
4. the spading system of land leveller as claimed in claim 3, which is characterized in that the spade blade device operation of the spade blade device
When attitude angle is 0 degree, perching knife structure angle of penetration is 15-30 degree, wherein the spade blade device operation attitude angle is institute
The upper surface of support plate and the angle of horizontal plane are stated, the perching knife structure angle of penetration is perching knife structure bottom arc knot
The tangent line of structure and the angle of horizontal direction.
5. the spading system of land leveller as described in claim 3 or 4, which is characterized in that the spade blade device of the spade blade device
When operation attitude angle is 0 degree, perching knife structure digs angle as 10-35 degree, wherein the spade blade device operation attitude angle
For the upper surface of the support plate and the angle of horizontal plane, the perching knife structure digs angle as perching knife structure the top arc
The tangent line of shape structure and the angle of horizontal direction.
6. the spading system of land leveller as claimed in claim 5, which is characterized in that further include angle position device and perching knife gesture stability
Oil cylinder, angle position device are articulated in by axis pin on the holder, and one end of the perching knife gesture stability oil cylinder is connected to described
On holder, the other end is connect with angle position device, and the support plate of the spade blade device is connect with angle position device, so as to control
The spade blade device is made relative to being overturn before and after the holder.
7. the spading system of land leveller as claimed in claim 6, which is characterized in that angle position utensil has sliding slot, the branch
There is fagging sliding part, the support plate to be embedded in the sliding slot by the sliding part and can be relative to described for side up and down
Angle position device lateral sliding.
8. the spading system of land leveller as claimed in claim 7, which is characterized in that the spading system further includes and the branch
The lateral sliding connecting plate of fagging connection, the lateral sliding connecting plate and the perching knife lateral sliding control being set on the holder
One end of liquefaction cylinder connects, so as to control the spade blade device relative to angle position device lateral sliding.
9. such as claim
The spading system of land leveller described in 3, which is characterized in that the perching knife structure includes shovel blade and perching knife arc plate, institute
It states perching knife arc plate to be connected in the reinforcing plate, the shovel blade is connected on the perching knife arc plate.
10. the spading system of land leveller as described in claim 1, which is characterized in that the end of the turbine box includes cylinder
External gear, the swing mechanism include ring gear, and the external gear forms gear with the ring gear and engages, and turbine box passes through institute
Stating gear engagement drives the swing mechanism to realize revolution.
11. a kind of land leveller, which is characterized in that include the spading system of the land leveller as described in one of claim 1-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410468562.9A CN105484304B (en) | 2014-09-16 | 2014-09-16 | A kind of spading system and the land leveller for including the spading system |
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| CN201410468562.9A CN105484304B (en) | 2014-09-16 | 2014-09-16 | A kind of spading system and the land leveller for including the spading system |
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| CN105484304B true CN105484304B (en) | 2018-08-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836336B (en) * | 2017-03-15 | 2019-01-18 | 中国神华能源股份有限公司 | A kind of wear-resisting block baffle |
| CN107142981A (en) * | 2017-07-13 | 2017-09-08 | 徐工集团工程机械有限公司 | Perching knife body, spading system and land leveller |
| CN108487351B (en) * | 2018-05-24 | 2024-05-10 | 徐州徐工筑路机械有限公司 | Land leveler shovel blade control mechanism and multi-working-condition shovel angle control system thereof |
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| JP2005299330A (en) * | 2004-04-15 | 2005-10-27 | Kobelco Contstruction Machinery Ltd | Dozer for shovel |
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| US5815959A (en) * | 1997-04-28 | 1998-10-06 | Caterpillar Inc. | Bucket shaped for reduced heel wear |
| CN102212996A (en) * | 2011-05-20 | 2011-10-12 | 同济大学 | Rotary land leveler operating device based on short-tooth shape |
| CN102995592A (en) * | 2011-09-16 | 2013-03-27 | 上海隆江医疗器械有限公司 | Snow shovel |
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| CN105484304A (en) | 2016-04-13 |
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