CN103112788A - Stand bar of engineering machinery and engineering machinery - Google Patents
Stand bar of engineering machinery and engineering machinery Download PDFInfo
- Publication number
- CN103112788A CN103112788A CN2013100707569A CN201310070756A CN103112788A CN 103112788 A CN103112788 A CN 103112788A CN 2013100707569 A CN2013100707569 A CN 2013100707569A CN 201310070756 A CN201310070756 A CN 201310070756A CN 103112788 A CN103112788 A CN 103112788A
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- base plate
- leg
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- construction machinery
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Abstract
The invention discloses a stand bar of an engineering machinery. The stand bar of the engineering machinery comprises a base plate (1), a support part (2) and a base plate extending part, wherein the support part (2) is arranged on the top surface of the base plate; the base plate extending part is connected with the edge of the outer periphery of the base plate, and is provided with an unfolding part in the same plane with the base plate, and a folding part which forms an included angle (alpha) with the base plate. The invention also provides the engineering machinery which comprises the stand bars, wherein a vertical oil cylinder of the engineering machinery is detachably connected with each support part. According to the stand bar, the grounding area requirement is met under different working conditions so as to improve the bearing capability and the tipping-resistant capability of the stand bar, meanwhile, the labor intensity of operators can also be lowered, and the working efficiency is improved.
Description
Technical field
The present invention relates to mechanical field, particularly, relate to a kind of leg and construction machinery and equipment of construction machinery and equipment.
Background technology
The leg of construction machinery and equipment is arranged on the bottom of Vertical Cylinders, the contact component on supporting leg and ground when forming engineer machinery operation.Because the weight of the weight of the weight of construction machinery and equipment self and lifting all is delivered to ground by leg, so leg not only needs to bear very large support reaction, also needs to have the stable anti-ability of tumbling.The base plate of wishing leg in practice is set to larger size, realizes the good support effect of leg by the ground contact area that improves base plate.
Shown in accompanying drawing 1 is cutaway view after the leg of construction machinery and equipment of the prior art and Vertical Cylinders line of centers are vertically cut open.Have larger size although the result of theoretical analysis is the base plate 1 of wishing leg, be subject to the integrally-built restriction of construction machinery and equipment, the size of base plate 1 is not often enough large.When the less and irregular operating mode in ground of the ground contact area that runs into base plate 1, generally increase the ground contact area of leg by the mode of the sleeper that the laying area is larger base plate 1 below.Like this, just need to carry sleeper with car.Use in the operating mode of sleeper at needs, first sleeper will be carried to the use location and be laid on below base plate 1, also sleeper will be carried go back to the original position of putting in order after finishing using.Cause thus increasing the labour intensity of operating personal, and reduce work efficiency.
Summary of the invention
The leg and the construction machinery and equipment that the purpose of this invention is to provide a kind of construction machinery and equipment, in order to satisfy the ground contact area needs of leg under different operating modes, weight capacity and the anti-ability of tumbling to improve leg can also reduce the labour intensity of operating personal simultaneously, and increase work efficiency.
To achieve these goals, the invention provides a kind of leg of construction machinery and equipment, comprise base plate and the support portion that is arranged on plate top surface.The leg of this project machinery also comprises the base plate extension of the neighboring that is connected to base plate; Wherein, the base plate extension has with base plate and is in conplane expanded position, and forms the curling position of angle with base plate.
Preferably, the base plate extension comprises a plurality of split parts, and each split part equally spaced is rotatably connected on base plate along the neighboring of base plate.
Preferably, the leg of this project machinery comprises a plurality of first locationss that each split part can be locked in expanded position; Wherein, an end of each the first locations is connected on the support portion, and the other end is connected on corresponding split part.
Preferably, a plurality of the first locationss are the self-locking type gas spring, and cylinder barrel and the one in piston rod of self-locking type gas spring are rotatably connected on the support portion, and another one is rotatably connected on corresponding split part.
Preferably, the leg of this project machinery comprises a plurality of second locationss that each split part can be locked in expanded position; Wherein, an end of each the second locations is connected on base plate, and the other end is connected on corresponding split part; And the connection structure of the connection structure of the second locations and base plate and/or the second locations and split part is the detouchable connection structure.
Preferably, each second locations comprises: the first snap ring, and this first snap ring is arranged on base plate; The second snap ring, this second snap ring is arranged on the split part; And plate, an end of this plate coordinates with the first snap ring plug, and the other end coordinates with the second snap ring plug.
Preferably, the leg of this project machinery comprises a plurality of the 3rd locationss that each split part can be fixed on the curling position; Wherein, each the 3rd locations comprises the first joint portion and the second joint portion that removably is connected with the first joint portion, and the first joint portion is connected on the support portion, and the second joint portion is connected on corresponding split part.
Preferably, offer drain gutter on base plate.
On the other hand, the present invention also provides a kind of construction machinery and equipment, and this project machinery comprises above-mentioned leg; Wherein, the Vertical Cylinders of construction machinery and equipment removably is connected with the support portion.
Preferably, the piston rod of Vertical Cylinders removably is connected by latch with the support portion, and the end of latch is provided with for the axially movable spring pin that limits latch; And construction machinery and equipment also comprises cable, and is arranged on the handle in order to carrying on base plate; Wherein, an end of cable connects handle, other end connecting bolt and spring pin.
By technique scheme, in the neighboring of base plate, the base plate extension is set, and the base plate extension can be in expanded position and curling position.When construction machinery and equipment is in non-operating condition or when construction machinery and equipment was in operating condition but does not need to use the base plate extension, this base plate extension can be fixed on the curling position, to reduce occupied space; When the work area of construction machinery and equipment ground relief needs larger area chassis ground, the base plate extension can be locked in expanded position, to enlarge the ground contact area of leg, improve weight capacity and the anti-ability of tumbling of leg.Therefore, leg of the present invention can satisfy the needs of ground contact area under different operating modes.And because the base plate extension directly is connected on base plate, need not to carry to and fro the base plate extension, therefore reduced the labour intensity of operating personal, and improved labour intensity.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification sheets, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the leg of construction machinery and equipment of the prior art and the front view of Vertical Cylinders;
Fig. 2 is the front view of the leg of construction machinery and equipment according to an embodiment of the invention, and the state that the base plate extension is in expanded position is shown;
Fig. 3 is the front view of the leg of construction machinery and equipment according to an embodiment of the invention, and the state that the base plate extension is in the curling position is shown;
Fig. 4 is the birds-eye view of the leg of construction machinery and equipment according to an embodiment of the invention, and the state that the base plate extension is in expanded position is shown;
Fig. 5 is the birds-eye view of the leg of construction machinery and equipment according to an embodiment of the invention, and the state that the base plate extension is in the curling position is shown;
Fig. 6 is the leg of construction machinery and equipment according to an embodiment of the invention and the front view of Vertical Cylinders, and the state that the base plate extension is in expanded position is shown;
Fig. 7 is the leg of construction machinery and equipment according to an embodiment of the invention and the front view of Vertical Cylinders, and the state that the base plate extension is in the curling position is shown.
Description of reference numerals
1 base plate 2 support portions
21 pillar stiffener 22 rib 23 supporting bases
3 split part 4 Vertical Cylinders 5 cables
6 handles
71 first locationss
721 first snap ring 722 second snap ring 723 plates
731 first 732 second joint portions, joint portions
The α angle
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
Referring to figs. 2 to Fig. 7, the invention provides a kind of leg of construction machinery and equipment.This leg comprises base plate 1, and this base plate 1 forms the ground connection position of leg.Be provided with support portion 2 on the end face of base plate 1, in order to the Vertical Cylinders 4 of propping works machinery.As shown in Fig. 2 and Fig. 4, support portion 2 comprises the pillar stiffener 21 that is positioned at the centre.The top of pillar stiffener 21 is provided with supporting base 23, in order to be connected with Vertical Cylinders 4.Be connected with a plurality of ribs 22 that distribute radially in the horizontal direction between supporting base 23 and base plate 1, in order to strengthen the support to supporting base 23.As can see from Figure 2, in the vertical direction, rib 22 extends obliquely from base plate 1 to the outer peripheral edges of supporting base 23, thus rib 22, base plate 1 and pillar stiffener 21 form stable triangular support structure.
Referring to figs. 2 to Fig. 5, according to embodiments of the invention, leg also comprises the base plate extension.This base plate extension is connected on base plate 1 around the neighboring of base plate 1, as the ductile area of base plate 1.According to embodiments of the invention, the base plate extension has expanded position and curling position.More specifically, on the one hand, when the base plate extension was in expanded position, this base plate extension and base plate 1 were in same plane.Like this, smooth not when the ground of the work area of construction machinery and equipment, when base plate 1 needs larger ground contact area could realize stable support, can make the base plate extension be in expanded position, to form the larger ground contact area of leg, improve weight capacity and the anti-ability of tumbling of leg, and improve the load-carrying ability of construction machinery and equipment.On the other hand, when the base plate extension was in the curling position, this base plate extension and base plate 1 formed angle α.Like this, when a ground contact area more smooth when the ground of the work area of construction machinery and equipment, that only need base plate 1 itself just is enough to realize stable support, can make the base plate extension be in the curling position, to reduce base plate extension occupied space as far as possible.According to said structure, owing to being provided with the base plate extension and making this base plate extension can be in different positions, make leg of the present invention can satisfy the needs of ground contact area under different operating modes.And, because the base plate extension directly is connected on base plate 1, therefore need not to carry to and fro the base plate extension, thereby reduced the labour intensity of operating personal, and improved labour intensity.
With reference to figure 4 and Fig. 5, according to embodiments of the invention, the base plate extension comprises a plurality of split parts 3.Like this, can operate respectively each split part 3 realizing the evolution of base plate extension, thereby greatly reduce base plate extension mobile difficulty between expanded position shown in Figure 4 and curling position shown in Figure 5.As shown in Figure 4 and Figure 5, each split part 3 is rotatably connected on base plate 1 along the neighboring of base plate 1, and pivot center is arranged in base plate 1 residing plane.More specifically, each split part 3 equally spaced is hinged on base plate 1, and when making the base plate extension be in expanded position, each split part 3 is uniform around the neighboring of base plate 1.Better preferred embodiment is shape and the in the same size of each split part 3.So, even the ground contact area of base plate 1 is enlarged, the stressed of whole base arrangement remains uniformly, with effective improvement of the anti-ability of tumbling of guaranteeing leg.Simultaneously, split part 3 is hinged on base plate 1, only needs to rotate around S. A. just can realize evolution, and operation is very easy.
Referring to figs. 2 to Fig. 5, according to embodiments of the invention, leg comprises a plurality of the first locationss 71.Each split part 3 should have first locations 71 corresponding with it at least, thereby each split part 3 can be locked in expanded position by the first locations 71.According to embodiments of the invention, an end of each the first locations 71 is connected on support portion 2, and the other end is connected on corresponding split part 3.Like this, can be by the relative position between two ends adjusting the first locations 71, make the first locations 71 form the support of inclination post rod type between support portion 2 and corresponding split part 3, so that split part 3 fixes the position, thereby lock reliably the position of split part 3 for support portion 2.Be appreciated that in order to strengthen the locking position effect of the first locations 71, also the other end of two or more the first locationss 71 can be connected on same split part 3.
More specifically, according to embodiments of the invention, the first preferred self-locking type gas spring of locations 71.The cylinder barrel of this self-locking type gas spring and the one in piston rod are rotatably connected on support portion 2, and another one is rotatably connected on corresponding split part 3.When need using the base plate extension, the piston rod by the self-locking type gas spring stretches out cylinder barrel, can promote split part 3 and rotate to expanded position; After split part 3 arrives expanded position, utilize the locking position performance of piston rod and the cylinder barrel of self-locking type gas spring, can be with the locking position of split part 3; When needing after finishing using to draw the base plate extension in, the piston rod by the self-locking type gas spring bounces back in cylinder barrel, can pull split part 3 to rotate to the curling position until split part 3 arrives the curling position.Further, according to embodiments of the invention, an end of self-locking type gas spring can be connected to the position of relatively more close base plate 1 on rib 22.Like this, can use the less self-locking type gas spring of stroke, to reduce the device fabrication cost.
Continuation is referring to figs. 2 to Fig. 5, and according to embodiments of the invention, leg can also comprise a plurality of the second locationss.Each split part 3 has second locations corresponding with it at least, thereby each split part 3 can be locked in expanded position more reliably by the second locations.According to embodiments of the invention, an end of each the second locations is connected on base plate 1, and the other end is connected on corresponding split part 3.Like this, when the two ends of the second locations are in same plane, just can make split part 3 and base plate 1 be in same plane, thereby realize split part 3 is locked in expanded position.Move to the curling position swimmingly in order to make the second locations not affect split part 3, in the connection structure of the connection structure of the second locations and base plate 1 and the second locations and split part 3, at least one is arranged to the detouchable connection structure.
More specifically, according to embodiments of the invention, each second locations can comprise the first snap ring 721, the second snap ring 722 and plate 723.Wherein, the first snap ring 721 is arranged on base plate 1, and the second snap ring 722 is arranged on split part 3, and the two ends of plate 723 can coordinate with the first snap ring 721 and the second snap ring 722 plugs respectively.Like this, when split part 3 turns to expanded position, the two ends of plate 723 are inserted into respectively in the first snap ring 721 and the second snap ring 722, just can be with the locking position of split part 3 in being in same plane with base plate 1.In addition, in order to strengthen the locking position effect of the second locations, also can between base plate 1 and same split part 3, a plurality of the second locationss be set.For example, can see in Fig. 4 and Fig. 5, be provided with two the second locationss between each split part 3 and base plate 1.
Still referring to figs. 2 to Fig. 5, according to embodiments of the invention, leg can also comprise a plurality of the 3rd locationss.Each split part 3 has three locations corresponding with it at least, thereby each split part 3 is fixed on the curling position by the 3rd locations.Each the 3rd locations can comprise the first joint portion 731 and the second joint portion 732 that removably connects.Wherein, the first joint portion 731 can be connected on support portion 2, and the second joint portion 732 can be connected on corresponding split part 3.Like this, when needs are fixed on the curling position with split part 3, the first joint portion 731 and the second joint portion 732 are linked together; When needs use split part 3, can open the connection between the first joint portion 731 and the second joint portion 732, make split part 3 to rotate to expanded position.
In addition, when the second joint portion 732 is arranged on position away from the S. A. of split part 3, be conducive to split part 3 is fixed on the curling position.Correspondingly, the first joint portion 731 can be arranged on the top of rib 22.Like this, when the first joint portion 731 and the second joint portion 732 linked together, the direction of tilt of split part 3 was consistent with the direction of tilt of rib 22 substantially.That is to say, when the base plate extension was positioned at the curling position, the end face of this base plate extension and base plate 1 formed the angle less than 90 °, and this base plate extension covers the outside of rib 22 substantially abreast.Reduced so, as much as possible the base plate extension in the occupied space of non-operating condition.
Be appreciated that the first joint portion 731 and the second joint portion 732 can be accomplished in several ways.Such as but not limited to, grab card slot type structure, socket type structural, screw connection structure etc.According to embodiments of the invention, annular ring is arranged in the first joint portion 731, elastic hook is arranged in the second joint portion 732.Only need elastic hook is hung on annular ring, just each split part 3 can be fixed on the curling position; Elastic hook and annular ring are broken away from, just can open the connection between the first joint portion 731 and the second joint portion 732.
According to above-mentioned, when construction machinery and equipment is in the state of not using, perhaps when the ground of the work area of construction machinery and equipment is more smooth when need not to use the base plate extension, the base plate extension is in the curling position.At this moment, the direction with rib 22 is consistent substantially for the direction of base plate extension; The elastic hook of the 3rd locations hangs on annular ring, and the plate 723 of the second locations is extracted, and the piston rod of the first locations 71 is retracted in cylinder barrel.Ground relief when the work area of construction machinery and equipment is when needing to use the base plate extension, with elastic hook and the annular ring disengaging of the 3rd locations.Then, making the piston rod of self-locking type gas spring stretch out cylinder barrel rotates towards expanded position with each split part 3 that promotes the base plate extension.After split part 3 arrives expanded position, the self-locking of self-locking type gas spring.Plate 723 is inserted in the first snap ring 721 and the second snap ring 722.Like this, just with each split part 3, namely the base plate extension is locked in expanded position.After the base plate extension is finished using, according to opposite step, it is reattached to the curling position and gets final product.
In addition, according to embodiments of the invention, offer drain gutter on base plate 1, be used in the rainy day draining.
According to a further aspect in the invention, provide a kind of construction machinery and equipment, this project machinery comprises above-mentioned leg.Wherein, Vertical Cylinders 4 removably is connected with supporting base 23 by latch.When not using leg for a long time, can open the connection between Vertical Cylinders 4 and supporting base 23, leg is put in order in addition, so that transportation and maintenance.According to embodiments of the invention, the end of latch is provided with spring pin, is used for limiting moving axially of latch.According to embodiments of the invention, be provided with handle 6 on base plate 1, so that carrying base plate 1.According to embodiments of the invention, construction machinery and equipment also comprises cable 5.One end of this cable 5 connects handle 6, other end connecting bolt and spring pin.Like this, can prevent latch and spring pin loss.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the leg of a construction machinery and equipment comprises base plate (1) and is arranged on support portion (2) on described base plate (1) end face; It is characterized in that, the leg of this project machinery also comprises the base plate extension of the neighboring that is connected to described base plate (1); Wherein, described base plate extension has with described base plate (1) and is in conplane expanded position, and forms the curling position of angle (α) with described base plate (1).
2. the leg of construction machinery and equipment according to claim 1, it is characterized in that, described base plate extension comprises a plurality of split parts (3), and each described split part (3) equally spaced is rotatably connected on described base plate (1) along the neighboring of described base plate (1).
3. the leg of construction machinery and equipment according to claim 2, is characterized in that, the leg of this project machinery comprises can be locked in each described split part (3) a plurality of first locationss (71) of described expanded position;
Wherein, an end of each described the first locations (71) is connected on described support portion (2), and the other end is connected on corresponding described split part (3).
4. the leg of construction machinery and equipment according to claim 3, it is characterized in that, a plurality of described the first locationss (71) are the self-locking type gas spring, the cylinder barrel of described self-locking type gas spring and the one in piston rod are rotatably connected on described support portion (2), and another one is rotatably connected on corresponding described split part (3).
5. the leg of according to claim 3 or 4 described construction machinery and equipments, is characterized in that, the leg of this project machinery comprises can be locked in each described split part (3) a plurality of second locationss of described expanded position;
Wherein, an end of each described the second locations is connected on described base plate (1), and the other end is connected on corresponding described split part (3); And
The connection structure of the connection structure of described the second locations and described base plate (1) and/or described the second locations and described split part (3) is the detouchable connection structure.
6. the leg of construction machinery and equipment according to claim 5, is characterized in that, each described second locations comprises: the first snap ring (721), and this first snap ring (721) is arranged on described base plate (1); The second snap ring (722), this second snap ring (722) is arranged on described split part (3); And plate (723), an end of this plate (723) coordinates with described the first snap ring (721) plug, and the other end coordinates with described the second snap ring (722) plug.
7. the leg of construction machinery and equipment according to claim 5, is characterized in that, the leg of this project machinery comprises can be fixed on each described split part (3) a plurality of the 3rd locationss of described curling position;
Wherein, each described the 3rd locations comprises the first joint portion (731) and the second joint portion (732) that removably is connected with described the first joint portion (731), and, described the first joint portion (731) is connected on described support portion (2), and described the second joint portion (732) is connected on corresponding described split part (3).
8. the leg of construction machinery and equipment according to claim 7, is characterized in that, described base plate offers drain gutter on (1).
9. a construction machinery and equipment, is characterized in that, this project machinery comprises the described leg of any one in claim 1-8;
Wherein, the Vertical Cylinders of described construction machinery and equipment (4) removably is connected with described support portion (2).
10. construction machinery and equipment according to claim 9, it is characterized in that, the piston rod of described Vertical Cylinders (4) removably is connected by latch with described support portion (2), and the end of described latch is provided be used to the axially movable spring pin that limits described latch; And
Described construction machinery and equipment also comprises cable (5), and is arranged on the handle (6) that is used for carrying on described base plate (1);
Wherein, an end of described cable (5) connects described handle (6), and the other end connects described latch and spring pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310070756.9A CN103112788B (en) | 2013-03-06 | 2013-03-06 | Stand bar of engineering machinery and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310070756.9A CN103112788B (en) | 2013-03-06 | 2013-03-06 | Stand bar of engineering machinery and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103112788A true CN103112788A (en) | 2013-05-22 |
| CN103112788B CN103112788B (en) | 2015-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310070756.9A Active CN103112788B (en) | 2013-03-06 | 2013-03-06 | Stand bar of engineering machinery and engineering machinery |
Country Status (1)
| Country | Link |
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| CN (1) | CN103112788B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2532437A (en) * | 2014-11-18 | 2016-05-25 | Charles Leicester Gordon | Stabiliser |
| CN106516994A (en) * | 2016-11-13 | 2017-03-22 | 无锡晟欧船舶设备有限公司 | Adjustable mobile rubbish crane |
| CN111606222A (en) * | 2020-05-19 | 2020-09-01 | 河南工业职业技术学院 | Combined telescopic arm system and engineering machinery |
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| CN202201628U (en) * | 2011-07-07 | 2012-04-25 | 中联重科股份有限公司 | Engineering machinery and support foot plate thereof |
| CN102491201A (en) * | 2011-12-05 | 2012-06-13 | 中联重科股份有限公司 | Support leg disc, support device and engineering vehicle |
| KR20120069032A (en) * | 2010-12-20 | 2012-06-28 | 권오준 | Multi-function lift |
| CN202643175U (en) * | 2012-05-02 | 2013-01-02 | 湖北省输变电工程公司 | Movable base for support leg of tyre crane |
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| CN201882815U (en) * | 2010-10-25 | 2011-06-29 | 徐州重型机械有限公司 | Elevator boom and self disassembling and assembling device thereof |
| KR20120069032A (en) * | 2010-12-20 | 2012-06-28 | 권오준 | Multi-function lift |
| CN202201628U (en) * | 2011-07-07 | 2012-04-25 | 中联重科股份有限公司 | Engineering machinery and support foot plate thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2532437A (en) * | 2014-11-18 | 2016-05-25 | Charles Leicester Gordon | Stabiliser |
| WO2016079489A1 (en) * | 2014-11-18 | 2016-05-26 | Gordon Charles Leicester | Stabiliser |
| US10118806B2 (en) | 2014-11-18 | 2018-11-06 | Gordon Charles Leicester | Stabiliser |
| GB2532437B (en) * | 2014-11-18 | 2018-12-19 | Charles Leicester Gordon | Stabiliser |
| CN106516994A (en) * | 2016-11-13 | 2017-03-22 | 无锡晟欧船舶设备有限公司 | Adjustable mobile rubbish crane |
| CN111606222A (en) * | 2020-05-19 | 2020-09-01 | 河南工业职业技术学院 | Combined telescopic arm system and engineering machinery |
| CN111606222B (en) * | 2020-05-19 | 2022-03-22 | 河南工业职业技术学院 | Combined telescopic arm system and engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103112788B (en) | 2015-06-17 |
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