CN102673646A - Concrete pumping equipment and frame thereof - Google Patents

Concrete pumping equipment and frame thereof Download PDF

Info

Publication number
CN102673646A
CN102673646A CN2012101574663A CN201210157466A CN102673646A CN 102673646 A CN102673646 A CN 102673646A CN 2012101574663 A CN2012101574663 A CN 2012101574663A CN 201210157466 A CN201210157466 A CN 201210157466A CN 102673646 A CN102673646 A CN 102673646A
Authority
CN
China
Prior art keywords
vehicle frame
support
wheel
concrete
pumping equipment
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
Application number
CN2012101574663A
Other languages
Chinese (zh)
Inventor
李国亮
吴德志
杨祯
王玖玖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zoomlion Heavy Industry Science and Technology Co Ltd
Original Assignee
Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN2012101574663A priority Critical patent/CN102673646A/en
Publication of CN102673646A publication Critical patent/CN102673646A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

The invention provides concrete pumping equipment and a frame thereof. The frame of the concrete pumping equipment comprises: the chassis (110), the chassis (110) includes the wheel (112) and mounts (111) installed on wheel (112); the support leg (120), the support leg (120) comprises a beam (121) and a support leg oil cylinder (122), the first end of the beam (121) is pivotally connected with the bracket (111), and the support leg oil cylinder (122) is installed at the second end of the beam (121); the legs (120) including a support position and a stowed position above the wheels (112); the legs (120) move between a support position and a stowed position. According to the frame, the problems that in the prior art, large construction space is needed and cost is high can be solved.

Description

Concrete pumping equipment and vehicle frame thereof
Technical field
The present invention relates to the concreting machinery field, more specifically, relate to a kind of concrete pumping equipment and vehicle frame thereof.
Background technology
In the engineering construction,, commonly used to equipment such as concrete pump or concrete pump trucks for transmission and concrete transmission is arrived the predetermined area.Concrete pump of the prior art has following several kinds of forms: use universal chassis and with the concrete pump truck of jib, use general chassis but the pump that drags the Vehicle loaded pump of jib not being installed and being used simple vehicle frame.From function, pump truck be have go, the concreting machinery equipment of pumping, three kinds of functions of cloth; Vehicle loaded pump be have go, the concreting machinery equipment of two kinds of functions of pumping; Dragging pump is the concreting machinery equipment with pump function.
Fig. 1 shows the vehicle frame 100 that drags pump of the prior art, and Fig. 2 shows the scheme drawing of the concrete pump of the vehicle frame 100 that has among Fig. 1.As illustrated in fig. 1 and 2, vehicle frame 100 comprises support 111 and the supporting leg 120 that is used for supporting bracket 111, and wherein, supporting leg 120 can be fixed, and also can stretch up and down.The vehicle frame 100 of concrete pump is provided with pumping mechanism 200.During work, arrange the concrete pipe at the construction field (site), thus the place that transmission and concrete transmission is extremely predetermined.
Fig. 3 shows the vehicle frame 100 of pump truck of the prior art, and Fig. 4 shows the scheme drawing of the concrete pump truck with vehicle frame shown in Figure 3 100.Shown in Fig. 3 and 4, vehicle frame 100 comprises the support 111 that is used for hold-down arm frame mechanism 400, telescopic front leg strut 120a, the rear support leg 120b that can swing and chassis etc.Pump truck also comprises pumping mechanism 200, beam mechanism 400 and concrete pipe, can accomplish concrete conveying independently.
Concrete pump has characteristics such as low to the workyard size requirements, that cost is low, but its manoevreability poor, waste time and energy, efficient is low.Concrete pump truck has characteristics such as maneuverability, efficient height, but needs bigger construction space, cost height.To narrow and small workyard, space, above-mentioned two kinds of equipment all have bigger limitation.
Summary of the invention
The present invention aims to provide a kind of concrete pumping equipment and vehicle frame thereof, with solve prior art need construction space, the cost of Shanghai Communications University high problem.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of vehicle frame of concrete pumping equipment is provided, it is characterized in that comprise: underframe, underframe comprise wheel and be installed in the support on the wheel; Supporting leg, supporting leg comprise beam and support oil cylinder, and first end of beam is connected with support pivotly, and support oil cylinder is installed in second end of beam; Supporting leg comprises Support Position and the curling position that is positioned at the wheel top; Supporting leg moves between Support Position and curling position.
Further, supporting leg also comprises oscillating oil cylinder, and an end of oscillating oil cylinder is connected with support pivotly, and the other end of oscillating oil cylinder is connected with beam pivotly.
Further, supporting leg is moving between Support Position and curling position under the driving of oscillating oil cylinder.
Further, vehicle frame also comprises rack-mount engine installation portion and/or goes up dress installation portion and/or hopper installation portion and/or jib support portion.
Further, support comprises the front and rear that is provided with along the direction of travel of vehicle frame, on adorn front portion or the rear portion that installation portion is installed in support, the jib support portion is arranged on a side relative with last dress installation portion.
Further, beam comprises first end that is arranged on beam and the curved portions between second end, and when beam was positioned at the curling position, wheel was located in the space of curved portions below.
Further, wheel comprises front-wheel and trailing wheel, and the diameter of front-wheel is less than the diameter of trailing wheel.
According to a further aspect in the invention, a kind of concrete pumping equipment is provided, has comprised vehicle frame, beam mechanism, pumping mechanism and concrete pipe; Pumping mechanism is arranged on the vehicle frame; The concrete pipe is installed on the beam mechanism, and an end of concrete pipe is connected with pumping mechanism, it is characterized in that; Vehicle frame is above-mentioned any vehicle frame, and beam mechanism is pivotably mounted on the vehicle frame.
Further, beam mechanism comprises at least two bonded assembly joint arms successively.
Further, at least a portion of concrete pipe is located in the inside of joint arm along the bearing of trend of joint arm.
Further, beam mechanism is truss-like or box.
Further, concrete pumping equipment also comprises the opposite counterweight that is provided with the direction of extension of beam mechanism.
Supporting leg among the present invention can be retracted back to the curling position near underframe, for example is recovered to the top of wheel, to reduce the car load width, plays the effect of guar plate, mudwing simultaneously.Therefore, effectively saved the integral width of concrete pumping equipment, made it more be prone to pass through at small space, comformability and practicality are stronger, and have characteristics simple in structure, that cost is low.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the vehicle frame that drags pump of the prior art;
Fig. 2 has schematically shown the scheme drawing of the concrete pump of the vehicle frame 100 that has among Fig. 1;
Fig. 3 has schematically shown the vehicle frame of pump truck of the prior art;
Fig. 4 has schematically shown the scheme drawing of the concrete pump truck with vehicle frame shown in Figure 3 100;
Fig. 5 has schematically shown the block diagram of the vehicle frame among the present invention;
Fig. 6 has schematically shown the front view of the vehicle frame among the present invention;
Fig. 7 has schematically shown the front view of the concrete pumping equipment among first embodiment among the present invention;
Fig. 8 has schematically shown the birds-eye view of Fig. 7;
Fig. 9 has schematically shown the front view of the concrete pumping equipment among second embodiment among the present invention;
Figure 10 has schematically shown the front view of the concrete pumping equipment among the 3rd embodiment among the present invention;
Figure 11 has schematically shown the front view of the concrete pumping equipment among the 4th embodiment among the present invention; And
Figure 12 has schematically shown the layout scheme drawing of the concrete pipe among the present invention.
Reference numeral among the figure: 100, vehicle frame; 110, underframe; 111, support; 112, wheel; 112a, front-wheel; 112b, trailing wheel; 113, hopper installation portion; 120, supporting leg; 120a, front leg strut; 120b, rear support leg; 121, beam; 122, support oil cylinder; 123, oscillating oil cylinder; 140, mount pad; 150, adorn installation portion on; 160, engine installation portion; 170, jib support portion; 200, pumping mechanism; 300, concrete pipe; 400, beam mechanism; 410, joint arm; 420, arm support oil cylinder; 421, part; 500, engine installation; 600, counterweight.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As first aspect of the present invention, a kind of vehicle frame of concrete pumping equipment is provided.As illustrated in Figures 5 and 6, this vehicle frame 100 comprises: underframe 110, underframe 110 comprise wheel 112 and are installed in the support 111 on the wheel 112; Supporting leg 120, supporting leg 120 comprise beam 121 and support oil cylinder 122, and first end of beam 121 is connected with support 111 pivotly, and support oil cylinder 122 is installed in second end of beam 121; Supporting leg 120 comprises Support Position and the curling position that is positioned at wheel 112 tops; Supporting leg 120 moves between Support Position and curling position.Preferably, the number of supporting leg 120 is four, and four supporting legs 120 are separately positioned on the left and right sides of support 111.
Preferably, beam 121 comprises first end that is arranged on beam 121 and the curved portions between second end, and when beam 121 was positioned at the curling position, wheel 112 was located in the space of curved portions below.Because wheel 112 is incorporated in the below of the curved portions of beam 121, thereby has further saved the space.
Because supporting leg 120 is connected with support 111 pivotly, therefore, when not needing pumping (for example going); Can supporting leg 120 be recovered to the curling position near underframe 110; For example be recovered to the top of wheel 112,, play the effect of guar plate, mudwing simultaneously to reduce the car load width.Therefore, effectively saved the integral width of concrete pumping equipment, made it more be prone to pass through at small space, comformability and practicality are stronger.When the needs pumping, supporting leg 120 is turned to the Support Position place in a certain angle with the fore-and-aft direction of support 111.Especially, the curling position can be the level attitude shown in Fig. 5 and 6, also can be other position, for example upwards turns to vertical position.Therefore, the vehicle frame among the present invention can not take bigger space in the process of moving, and has characteristics simple in structure, that cost is low.
Preferably, as shown in Figure 6, supporting leg 120 also comprises oscillating oil cylinder 123, and an end of oscillating oil cylinder 123 is connected with support 111 pivotly, and the other end of oscillating oil cylinder 123 is connected with beam 121 pivotly.Preferably, supporting leg 120 is moving between Support Position and curling position under the driving of oscillating oil cylinder 123.Like this, just can drive supporting leg 120 gatherings and expansion through oscillating oil cylinder 123.For example, supporting leg 120 is at horizontal in-plane moving.In addition, adopt the mode of oscillating oil cylinder 123, can make the bearing surface of supporting leg wideer, support is more reliable, whole vehicle stability is high.
Preferably, vehicle frame 100 also comprises the engine installation portion 160 that is installed on the support 111 and/or goes up dress installation portion 150 and/or hopper installation portion 113 and/or jib support portion 170.Preferably, adorning installation portion 150 on is connected with support 111 through mount pad 140.Especially, on to adorn installation portion 150 be barrel-contoured, it can be used for hold-down arm frame mechanism etc.Jib support portion 170 can make whole vehicle frame front and back stress equalization, and integral body is more stable.
The present invention drags the vehicle frame of pump with respect to available coagulation soil, carries the dress installation tube, but the hold-down arm frame mechanism.The formula pump truck that drags behind the beam mechanism has been installed has been had the function of cloth, made that the pump truck with the vehicle frame among the present invention has fast, advantage efficiently.In addition, this vehicle frame has oscillating support leg, makes vehicle frame more reliable and more stable in the course of the work.
When the concrete pumping equipment among the present invention is worked; Through oscillating oil cylinder 123 four supporting legs 120 are moved to " eight " word or fall " eight " word shape earlier; Stretch out with rear drive supporting leg 120, and then drive support oil cylinder 122 and stretch out, thereby whole vehicle frame 100 is supported.At this moment, the wheel built on stilts guaranteeing the stable operation of vehicle frame 100, and when being installed in the beam mechanism adorned on the installation portion 150 at cloth, can guarantee the work that car load is stable.
Preferably, wheel 112 comprises front-wheel 112a and trailing wheel 112b, and the diameter of front-wheel 112a goes conveniently to have dragged less than the diameter of trailing wheel 112b.
As second aspect of the present invention, please refer to Fig. 7-11, a kind of concrete pumping equipment is provided, comprise vehicle frame, beam mechanism 400, pumping mechanism 200 and concrete pipe 300.Pumping mechanism 200 is arranged on the vehicle frame 100, and concrete pipe 300 is installed on the beam mechanism 400, and an end of concrete pipe 300 is connected with pumping mechanism 200.Wherein, vehicle frame is the vehicle frame 100 among above-mentioned each embodiment, and beam mechanism 400 is pivotably mounted on the vehicle frame 100.Preferably, concrete pumping equipment is the towed concrete pump car.
Preferably, beam mechanism 400 comprises at least two bonded assembly joint arms 410 successively, to realize bigger scope of work.Preferably, at least two joint arms 410 can be folded up by modes such as Z type, R type or RZ types.Preferably, beam mechanism 400 also comprises arm support oil cylinder 420, to drive the jib motion.
The present invention is with respect to towed concrete pump of the prior art; Carry jib and concrete pipe; Have small and exquisite flexibly, quick, efficient, characteristics that cost is low; Especially narrow and small for the space, the little workyard of concrete pumping height like compact villa district, foreign-style house district, new countryside construction block etc., have obvious advantages.
Preferably, support 111 comprises the front and rear that is provided with along the direction of travel of vehicle frame.Last dress installation portion 150 is installed in the front portion or the rear portion of support 111, and jib support portion 170 is arranged on a side relative with last dress installation portion 150, so that jib is supported.
For example, in the embodiment shown in fig. 9, beam mechanism is arranged on the position near pumping mechanism at the rear portion of vehicle frame 111, can reduce the length of concrete pipe like this, makes hopper feed not receive the restriction in jib space.In the embodiment shown in fig. 10, beam mechanism is arranged on the position of the front portion of vehicle frame 111, and engine installation is arranged between pumping mechanism and the beam mechanism, so that to pumping mechanism power is provided.
Especially, in an embodiment shown in Figure 10, front-wheel is single support wheel, thereby makes the structure of vehicle frame simpler.In the embodiment shown in fig. 11, concrete pumping equipment also comprises the opposite counterweight 600 that is provided with of direction of extension with beam mechanism 400, the stability when working to increase car load.Preferably, counterweight 600 can be rotated with the rotation of beam mechanism 400, to realize the purpose of balance better.
Preferably, beam mechanism 400 is truss-like or box.Especially, when adopting the structure of truss-like, concrete pipe major part is arranged in the casing of jib, and the unbalance loading that during work jib is produced is little, and simultaneously, the wind-force that jib bears is little, improves the stressed of jib greatly, is beneficial to the lightweight that realizes jib.
Preferably, concrete pumping equipment also comprises the other end bonded assembly flexible pipe (not shown) with concrete pipe 300, so that the cloth of local diverse location.
Preferably, concrete pumping equipment also comprises the engine installation 500 that is installed on the vehicle frame 100, and engine installation 500 is connected with pumping mechanism 200.
In one embodiment, concrete pumping equipment comprises also and is used to drive the mobile devices that vehicle frame 100 goes that mobile devices separate with pumping power, make the present invention not need trailer just can independently go.
In a preferred embodiment, shown in figure 12, at least a portion of concrete pipe 300 is located in the inside of joint arm 410 along the bearing of trend of joint arm 410.Therefore, need not take bigger space, be convenient to the integral layout of jib, the wind-force that unbalance loading that when also having reduced work jib has been produced and jib bear, thus improved the stressed of jib, be beneficial to the lightweight that realizes jib, make vehicle body more stable.
Preferably, the part 421 that is positioned at adjacent two joint arm junctions of concrete pipe 120 is arranged on the outside of joint arm, thereby has simplified the connection at the concrete pipe of joint arm junction, has improved the connection reliability of concrete pipe.。
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. the vehicle frame of a concrete pumping equipment is characterized in that, comprising:
Underframe (110), said underframe (110) comprise wheel (112) and are installed in the support (111) on the said wheel (112);
Supporting leg (120), said supporting leg (120) comprise beam (121) and support oil cylinder (122), and first end of said beam (121) is connected with said support (111) pivotly, and said support oil cylinder (122) is installed in second end of said beam (121);
Said supporting leg (120) comprises Support Position and the curling position that is positioned at said wheel (112) top; Said supporting leg (120) moves between said Support Position and said curling position.
2. vehicle frame according to claim 1; It is characterized in that; Said supporting leg (120) also comprises oscillating oil cylinder (123), and an end of said oscillating oil cylinder (123) is connected with said support (111) pivotly, and the other end of said oscillating oil cylinder (123) is connected with said beam (121) pivotly.
3. vehicle frame according to claim 2 is characterized in that, said supporting leg (120) is moving between said Support Position and said curling position under the driving of said oscillating oil cylinder (123).
4. according to each described vehicle frame among the claim 1-3; It is characterized in that said vehicle frame (100) also comprises the engine installation portion (160) that is installed on the said support (111) and/or goes up dress installation portion (150) and/or hopper installation portion (113) and/or jib support portion (170).
5. vehicle frame according to claim 4; It is characterized in that; Said support (111) comprises the front and rear that is provided with along the direction of travel of said vehicle frame; Said going up adorned front portion or the rear portion that installation portion (150) is installed in said support (111), and said jib support portion (170) is arranged on and the said relative side of dress installation portion (150) that goes up.
6. vehicle frame according to claim 4; It is characterized in that; Said beam (121) comprises first end that is arranged on said beam (121) and the curved portions between second end, and when said beam (121) was positioned at said curling position, said wheel (112) was located in the space of said curved portions below.
7. according to each described vehicle frame among the claim 1-3, it is characterized in that said wheel (112) comprises front-wheel (112a) and trailing wheel (112b), the diameter of said front-wheel (112a) is less than the diameter of said trailing wheel (112b).
8. concrete pumping equipment; Comprise vehicle frame, beam mechanism (400), pumping mechanism (200) and concrete pipe (300), said pumping mechanism (200) is arranged on the said vehicle frame (100), and said concrete pipe (300) is installed on the said beam mechanism (400); And an end of said concrete pipe (300) is connected with said pumping mechanism (200); It is characterized in that said vehicle frame is each described vehicle frame (100) among the claim 1-7, said beam mechanism (400) is pivotably mounted on the said vehicle frame (100).
9. concrete pumping equipment according to claim 8 is characterized in that, said beam mechanism (400) comprises at least two bonded assembly joint arms (410) successively.
10. concrete pumping equipment according to claim 9 is characterized in that, at least a portion of said concrete pipe (300) is located in the inside of said joint arm (410) along the bearing of trend of said joint arm (410).
11. concrete pumping equipment according to claim 8 is characterized in that, said beam mechanism (400) is truss-like or box.
12. each described concrete pumping equipment is characterized in that according to Claim 8-11, said concrete pumping equipment also comprises the opposite counterweight (600) that is provided with of direction of extension with said beam mechanism (400).
CN2012101574663A 2012-05-18 2012-05-18 Concrete pumping equipment and frame thereof Pending CN102673646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101574663A CN102673646A (en) 2012-05-18 2012-05-18 Concrete pumping equipment and frame thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101574663A CN102673646A (en) 2012-05-18 2012-05-18 Concrete pumping equipment and frame thereof

Publications (1)

Publication Number Publication Date
CN102673646A true CN102673646A (en) 2012-09-19

Family

ID=46806365

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012101574663A Pending CN102673646A (en) 2012-05-18 2012-05-18 Concrete pumping equipment and frame thereof

Country Status (1)

Country Link
CN (1) CN102673646A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109367339A (en) * 2018-11-15 2019-02-22 三汽车制造有限公司 Drag pump
CN112554570A (en) * 2020-11-18 2021-03-26 梁恒昌 Steel bar laying machine for building engineering

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830315A1 (en) * 1988-09-07 1990-03-08 Putzmeister Maschf MOBILE CONCRETE PUMP
CN2799744Y (en) * 2005-05-31 2006-07-26 韦啟征 Movable concrete spreader
CN101774401A (en) * 2009-01-09 2010-07-14 德国曼商用车辆股份公司 Method for assembling a front end of a truck with driver cab and front end of a truck
CN201703436U (en) * 2010-01-22 2011-01-12 徐工集团工程机械股份有限公司建设机械分公司 Truck frame of dragging type concrete pump truck and dragging type concrete pump truck
CN202573937U (en) * 2012-05-18 2012-12-05 中联重科股份有限公司 Concrete pumping equipment and frame thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830315A1 (en) * 1988-09-07 1990-03-08 Putzmeister Maschf MOBILE CONCRETE PUMP
CN2799744Y (en) * 2005-05-31 2006-07-26 韦啟征 Movable concrete spreader
CN101774401A (en) * 2009-01-09 2010-07-14 德国曼商用车辆股份公司 Method for assembling a front end of a truck with driver cab and front end of a truck
CN201703436U (en) * 2010-01-22 2011-01-12 徐工集团工程机械股份有限公司建设机械分公司 Truck frame of dragging type concrete pump truck and dragging type concrete pump truck
CN202573937U (en) * 2012-05-18 2012-12-05 中联重科股份有限公司 Concrete pumping equipment and frame thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109367339A (en) * 2018-11-15 2019-02-22 三汽车制造有限公司 Drag pump
CN112554570A (en) * 2020-11-18 2021-03-26 梁恒昌 Steel bar laying machine for building engineering

Similar Documents

Publication Publication Date Title
CN201914226U (en) Construction machinery and ground jack thereof
WO2009036627A1 (en) Support device for walking machines
CN202016815U (en) Automobile crane
CN104085799B (en) A kind of pulling type lorry-mounted crane had from walking function
CN202441063U (en) Rotary table and engineering machinery and arm support devices thereof
CN102001589A (en) Automobile crane
CN202573937U (en) Concrete pumping equipment and frame thereof
CN201486151U (en) Traveling engineering machine and bearing device thereof
JP2021104896A (en) Vehicle crane
JP2023060319A (en) Combination vehicle
CN102673646A (en) Concrete pumping equipment and frame thereof
WO2013060232A1 (en) Leg device for engineering machinery and concrete pump truck
CN202030451U (en) Wheel type container portal crane and cart traveling mechanism
CN202413745U (en) Engineering machinery and supporting system thereof
CN107150561B (en) One kind can folding and unfolding suspension
CN202358069U (en) Chassis structure of concrete pump truck with X-shaped support legs, and concrete pump truck
JP6853128B2 (en) Wheel-type counterweight
CN107351930A (en) The displacement device and method of a kind of caterpillar chassis
CN207389300U (en) Rear side driving wheel positioning small space turning device in aerial work platform
CN205713127U (en) The boom system of pump truck and pump truck
CN102991477B (en) Engineering machine and supporting leg device thereof
CN202441065U (en) Arm support device and concrete pump truck
CN108517906A (en) The working method and conveyer method of walking type excavator and walking type excavator
CN213323350U (en) Supporting leg unfolding and folding chassis and engineering machinery
CN104229640A (en) Caterpillar orbital transfer device and crane

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20120919