CN102126526A - Engineering machine and crawler-type travelling mechanism thereof - Google Patents

Engineering machine and crawler-type travelling mechanism thereof Download PDF

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Publication number
CN102126526A
CN102126526A CN2011100524319A CN201110052431A CN102126526A CN 102126526 A CN102126526 A CN 102126526A CN 2011100524319 A CN2011100524319 A CN 2011100524319A CN 201110052431 A CN201110052431 A CN 201110052431A CN 102126526 A CN102126526 A CN 102126526A
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CN
China
Prior art keywords
walking mechanism
wheel
crawler type
type walking
cylinder
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Pending
Application number
CN2011100524319A
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Chinese (zh)
Inventor
陈锷
杨文林
徐斌
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Sany Heavy Equipment Co Ltd
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Sany Heavy Equipment Co Ltd
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Filing date
Publication date
Application filed by Sany Heavy Equipment Co Ltd filed Critical Sany Heavy Equipment Co Ltd
Priority to CN2011100524319A priority Critical patent/CN102126526A/en
Publication of CN102126526A publication Critical patent/CN102126526A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a crawler-type travelling mechanism, comprising a crawler (1), crawler frames (2), front wheels (3) arranged in the crawler frames (2), rear wheels (4) and a tensioning cylinder (5), wherein the rear wheels (4) are tensioning wheels, the tensioning cylinder (5) is arranged at the rear parts of the crawler frames (2); the fixed end (51) of the tensioning cylinder (5) is fixedly connected with crawler boards, arranged between the front wheels (3) and the rear wheels (4), of the crawler frames, and the movable end (52) of the tensioning cylinder is connected with the rear wheels (4). The tensioning cylinder (5) is arranged at the rear part, thus the front wheels (3) can not move forward any longer, and the structural layout of a shipping component in front of a chassis arranged between two crawler frames (2) is improved. The invention also discloses an engineering machine, comprising the shipping component and a travelling mechanism, wherein the travelling mechanism adopts the crawler-type travelling mechanism provided by the invention, and the same technical effect is achieved.

Description

A kind of construction machinery and equipment and crawler type walking mechanism thereof
Technical field
The present invention relates to technical field of engineering machinery, relate in particular to a kind of crawler type walking mechanism that is used for construction machinery and equipment.The invention still further relates to a kind of construction machinery and equipment that comprises above-mentioned crawler type walking mechanism.
Background technology
Along with the fast development of economic construction, the Chinese large-sized engineering increases gradually, and the demand for construction machinery and equipment on the market is also increasing.
Development machine equipment is a kind of major equipment that the tunnel exploitation is carried out in the colliery, be to integrate the underworkings speedy drivage equipment of adopting, collect, transporting in the tunnel, development machine mainly comprises cutting mechanism, traveling gear, shipment parts, hydraulic efficiency pressure system, cooling spray system and reprints mechanism.The traveling gear of development machine adopts the electrical haulage creeper undercarriage usually, provides prime power by motor, after slowing down through retarder, makes crawler belt obtain the different speeds of travel.The shipment parts of development machine mainly comprise shovel board portion and slat conveyer, and shovel board portion accepts cutterhead and cuts the coal that falls and the slat conveyer of packing into, finishes the shipment operation.
Please refer to Fig. 1, Fig. 1 is the structural representation of crawler type walking mechanism of the prior art; Briefly introduce the defective that this crawler type walking mechanism exists at work below.
In the prior art, as shown in Figure 1, this crawler type walking mechanism comprise track frame 1 ', crawler belt 2 ', tension wheel 3 ', drive wheel 4 ' and tensioning hydro-cylinder 5 '.Tension wheel 3 ' and drive wheel 4 ' be located at respectively track frame 1 ' the place ahead and rear, the two be engaged in crawler belt 2 ' the inboard, drive crawler belt 2 ' rollings and walk.Tensioning hydro-cylinder 5 ' be located at track frame 1 ' the front portion, the one end be fixedly connected on track frame 1 ' the middle part, the other end be fixedly connected on anterior tension wheel 3 ', when crawler belt 2 ' relaxation occurs needs tensioning, tensioning hydro-cylinder 5 ' movable end stretch out, promote forward tension wheel 3 ', increase tension wheel 3 ' with track frame 1 ' middle part between distance, thereby realization to crawler belt 2 ' tensioning.
Yet, since development machine also comprise shovel board portion 6 ', its be fixedly connected on two crawler type walking mechanisms between the place ahead on chassis, the tension wheel 3 that the position often changes ' make shovel board portion 6 ' when position, need consider tension wheel 3 ' maximum reach position, thereby must increase shovel board portion 6 ' with track frame 1 ' distance, but the shovel board portion 6 ' meeting of reach produces the phenomenon of interfering with the cutting units of development machine, this to shovel board portion 6 ' layout bring very big difficulty.
Therefore, how on the basis of existing technology, improve the structure of crawler type walking mechanism, make front-wheel stationkeeping in this crawler type walking mechanism, no longer reach, thereby reducing the distance of shovel board portion and track frame, make that the location layout of shovel board portion is reasonable, is the problem that those skilled in the art need solve at present.
Summary of the invention
The technical problem to be solved in the present invention is for providing a kind of crawler type walking mechanism, the front-wheel stationkeeping of this crawler type walking mechanism, thus make things convenient for the installation of the shipment parts of engineering machinery chassis front portion.Another technical matters that the present invention will solve is for providing a kind of construction machinery and equipment that comprises above-mentioned crawler type walking mechanism.
For solving the problems of the technologies described above, the invention provides a kind of crawler type walking mechanism, comprise crawler belt, track frame, be located at described track frame in-to-in front-wheel, trailing wheel and tensioning hydro-cylinder; Described trailing wheel is a tension wheel, and described tensioning hydro-cylinder is located at the rear portion of described track frame; The fixed end of described tensioning hydro-cylinder be fixedly connected on described track frame on the caterpillar block between described front-wheel and the described trailing wheel, its movable end is connected in described trailing wheel.
Preferably, described front-wheel and described trailing wheel are the drive wheel of described crawler type walking mechanism.
Preferably, one in described front-wheel and the described trailing wheel is the drive wheel of described crawler type walking mechanism, and another person is the track adjusting wheel of described crawler type walking mechanism.
Preferably, the oil inlet of described tensioning hydro-cylinder is connected with the pressure hydraulic fluid port of the HM Hydraulic Motor of described crawler type walking mechanism.
Preferably, the external stability of described trailing wheel is connected with erecting frame, and the movable end of described tensioning hydro-cylinder is fixedly connected on described trailing wheel by described erecting frame.
Preferably, also be provided with contiguous block between described tensioning hydro-cylinder and the erecting frame, the movable end of described tensioning hydro-cylinder is connected in described erecting frame by described contiguous block.
Preferably, the rear side of described contiguous block is fixedly connected on described erecting frame, and the anterior end surface of described contiguous block is provided with groove, and described movable end is plugged in the described groove.
The present invention also provides a kind of construction machinery and equipment, comprises shipment parts and traveling gear; Described traveling gear adopts above-mentioned crawler type walking mechanism.
Preferably, described construction machinery and equipment can be specially development machine.
The invention provides a kind of crawler type walking mechanism, the trailing wheel of this traveling gear is a tension wheel, tensioning hydro-cylinder is located at the rear portion of track frame, the fixed end of this tensioning hydro-cylinder be fixedly connected on track frame on the caterpillar block between front-wheel and the trailing wheel, its movable end is connected in trailing wheel.
Adopt the structure of tensioning hydro-cylinder postposition, the movable end of tensioning hydro-cylinder is connected in trailing wheel, when the crawler belt of crawler type walking mechanism relaxes, the pressure oil of control tensioning hydro-cylinder, the movable end of tensioning hydro-cylinder is stretched out backward, promote tension wheel and move backward, the fixed end of tensioning hydro-cylinder and the distance of tension wheel are increased, thus stretching and tension wheel ingear crawler belt; When the crawler belt of crawler type walking mechanism was too tightened, the pressure oil of control tensioning hydro-cylinder was withdrawn the movable end of tensioning hydro-cylinder forward, tension wheel travels forward, the fixed end of tensioning hydro-cylinder and the distance of tension wheel are reduced, thereby loosen crawler belt, crawler belt is steadily walked.
From above-mentioned working process as can be seen, because tensioning hydro-cylinder postposition, tensioning hydro-cylinder changes is distance between its fixed end and the trailing wheel, and the preceding wheel location of track frame is fixing all the time in the work, no longer reach, compared to existing technology, improved the topology layout of the shovel board portion that is installed on two the place aheads, chassis between the track frame, it can be installed on more close chassis, thereby avoided causing the phenomenon of interfering, thereby made the structure of whole construction machinery and equipment more rationally compact with cutting units because of the installation of shovel board portion is forward.In addition because the front end kiss the earth of shovel board portion, when the installation site of shovel board portion after the distance of track frame diminishes, further strengthened the bearing force of shovel board portion, thereby increased the working stability of development machine whole development machine.
Because above-mentioned crawler type walking mechanism has above-mentioned technique effect, therefore, comprises that the construction machinery and equipment of this crawler type walking mechanism also has the corresponding techniques effect, does not repeat them here.
Description of drawings
Fig. 1 is the structural representation of crawler type walking mechanism of the prior art;
Fig. 2 is the birds-eye view of a kind of specific embodiment of crawler type walking mechanism provided by the present invention;
Fig. 3 loads and transports the front view behind the parts for Fig. 2 installs;
Fig. 4 is the structural representation of a kind of specific embodiment of construction machinery and equipment provided by the present invention.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1:
1 ' track frame; 2 ' crawler belt; 3 ' tension wheel; 4 ' drive wheel; 5 ' tensioning hydro-cylinder; 6 ' shovel board portion;
Corresponding relation among Fig. 2 to Fig. 4 between Reference numeral and the component names is:
1 crawler belt; 2 track frames; 3 front-wheels; 4 trailing wheels; 5 tensioning hydro-cylinders; 6 shovel board portions; 7 HM Hydraulic Motor; 21 side plates; 22 erecting frames; 23 contiguous blocks; 51 fixed ends; 52 movable ends.
The specific embodiment
Core of the present invention is for providing a kind of crawler type walking mechanism, and this crawler type walking mechanism makes that the front-wheel stationkeeping is constant, makes things convenient for the installation of the shipment parts in traveling gear the place ahead.Another core of the present invention is for providing the construction machinery and equipment that comprises above-mentioned crawler type walking mechanism.
In order to make those skilled in the art understand technical scheme of the present invention better, the concrete structure with the development machine in the mining machinery is an example below, and the present invention is described in further detail with specific embodiment in conjunction with the accompanying drawings.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is the birds-eye view of a kind of specific embodiment of crawler type walking mechanism provided by the present invention; Fig. 3 loads and transports the front view behind the parts for Fig. 2 installs.
In a kind of concrete embodiment, as shown in Figures 2 and 3, crawler type walking mechanism provided by the present invention comprises crawler belt 1, track frame 2, front-wheel 3, trailing wheel 4 and tensioning hydro-cylinder 5.Track frame 2 is main supports of crawler type walking mechanism; Front-wheel 3, trailing wheel 4 and tensioning hydro-cylinder 5 all are located at track frame 2 inside, and front-wheel 3 and trailing wheel 4 respectively with the front-end and back-end engagement of crawler belt 1 inboard, drive crawler belt 1 walking of rolling; Tensioning hydro-cylinder 5 is by promoting tension wheel, thereby realize the major part of tensioned tracks 1 function, the trailing wheel 4 of this crawler type walking mechanism is a tension wheel, tensioning hydro-cylinder 5 is arranged at the rear portion of track frame 2, its fixed end 51 be fixedly connected on track frame 2 on the caterpillar block between front-wheel 3 and the trailing wheel 4, its movable end 52 is connected in trailing wheel 4.
Adopt the structure of tensioning hydro-cylinder 5 postposition, the movable end 52 of tensioning hydro-cylinder 5 is connected in trailing wheel 4, when the crawler belt 1 of crawler type walking mechanism relaxes, the pressure oil of control tensioning hydro-cylinder 5, the movable end 52 of tensioning hydro-cylinder 5 is stretched out backward, promote tension wheel and move backward, make the fixed end 51 of tensioning hydro-cylinder 5 and the distance of tension wheel increase, thus stretching and tension wheel ingear crawler belt 1; When the crawler belt 1 of crawler type walking mechanism was too tightened, the pressure oil of control tensioning hydro-cylinder 5 was withdrawn the movable end 52 of tensioning hydro-cylinder 5 forward, tension wheel travels forward, its fixed end 51 reduces with the distance of tension wheel, thereby loosens crawler belt 1, and crawler belt 1 is steadily walked.
From above-mentioned working process as can be seen, because tensioning hydro-cylinder 5 postposition, tensioning hydro-cylinder 5 changes is distance between its fixed end and the trailing wheel 4, and front-wheel 3 positions of track frame are fixing all the time in the work, no longer reach, compared to existing technology, improved the topology layout of the shovel board portion 6 that is installed on two the place aheads, chassis between the track frame 2, it can be installed on more close chassis, thereby avoided causing the phenomenon of interfering, thereby made the structure of whole construction machinery and equipment more rationally compact with cutting units because of 6 installations of shovel board portion are forward.In addition because the front end kiss the earth of shovel board portion 6, when the installation site of shovel board portion 6 after the distance of track frame 2 diminishes, further strengthened the bearing force of 6 pairs of whole development machines of shovel board portion, thereby increased the working stability of development machine.
Need to prove; the above-mentioned specific embodiment do not limit above-mentioned front-wheel 3 and trailing wheel 4 which for drive wheel, which is track adjusting wheel; do not limit yet the fixed end 51 of tensioning hydro-cylinder 5 and movable end 52 which for cylinder barrel, which is piston rod; do not limit the concrete connection mode of tensioning hydro-cylinder 5 and track frame 2, trailing wheel 4 yet; in fact; every tensioning hydro-cylinder 5 postposition; its fixed end 51 is connected in the track frame 2 between front-wheel 3 and the trailing wheel 4, the crawler type walking mechanism that movable end 52 connects trailing wheel 4, all should work as to belong in protection scope of the present invention.
In addition, the noun of locality of Chu Xianing " preceding " refers to the direction of being pointed to shovel board portion 6 by track frame 2, i.e. dextrosinistral direction in the accompanying drawing herein; The noun of locality of Chu Xianing " back " refers to the direction of being pointed to track frames 2 by shovel board portion 6 herein, i.e. from left to right direction in the accompanying drawing; Should be appreciated that these nouns of locality all are is that benchmark is set up with herein accompanying drawing, their appearance should not influence protection scope of the present invention.
The specific constructive form of above-mentioned front-wheel 3 and trailing wheel 4 can also further be set.
In concrete scheme, one in above-mentioned front-wheel 3 and the trailing wheel 4 is the drive wheel of crawler type walking mechanism, and another person is the track adjusting wheel of crawler type walking mechanism.Adopt two of this structure to drive crawler type walking mechanism, no matter front-wheel 3 drives still trailing wheel 4 drivings, all can provide identical propulsive effort, makes crawler type walking mechanism have simple in structure, layout flexible characteristic, is suitable for the construction machinery and equipment of level road walking.
In the concrete embodiment of another kind, the outside of above-mentioned front-wheel 3 and trailing wheel 4 can all be connected with HM Hydraulic Motor 7 and driving speed reducer, it is the drive wheel that front-wheel 3 and trailing wheel 4 are crawler type walking mechanism, this makes crawler type walking mechanism become four-drive traveller, in model that does not increase HM Hydraulic Motor 7 and driving speed reducer and size, promptly need not to increase crawler belt 1 size, need not to increase under the situation of construction machinery and equipment height, increased the walking propulsive effort of crawler type walking mechanism greatly, thereby increased the hill climbing ability of the construction machinery and equipment that comprises this crawler type walking mechanism, locomitivity, and to the comformability in tunnel.
The concrete type of attachment of the hydraulic fluid port of above-mentioned tensioning hydro-cylinder 5 can also further be set.
In the concrete embodiment of another kind, the oil inlet of above-mentioned tensioning hydro-cylinder 5 can with the pressure hydraulic fluid port direct connection of the HM Hydraulic Motor 7 of crawler type walking mechanism.Adopt this connection mode, when making HM Hydraulic Motor 7 action, tension wheel is given in the movable end 52 applied thrust effect all the time of tensioning hydro-cylinder 5, makes traveling crawler 1 in tension all the time, thereby reduces walking resistance, improves the efficient that walking drives.
The concrete connection mode of above-mentioned tensioning hydro-cylinder 5 and track frame 2, trailing wheel 4 can also further be set.
As shown in Figure 2, the fixed end 51 of above-mentioned tensioning hydro-cylinder 5 can be fixedly connected on the side plate 21 at the middle part of above-mentioned track frame 2, this connection mode has simple in structure, maneuverable advantage, and certainly, tensioning hydro-cylinder 5 can also adopt other mode to be fixedly connected on track frame 2.
In the concrete embodiment of another kind, the outside of above-mentioned trailing wheel 4 also is fixedly connected with erecting frame 22, and the movable end 52 of tensioning hydro-cylinder 5 is fixedly connected on trailing wheel 4 by this erecting frame 22.In the working process, the movable end 52 of tensioning hydro-cylinder 5 is passed to erecting frame 22 with power in the process of stretching out or withdrawing, thereby drive trailing wheel 4 stretches out or withdraws, and erecting frame 22 is set here, can play the effect of protection and support to trailing wheel 4.
In the scheme, also be provided with contiguous block 23 between the erecting frame 22 of above-mentioned tensioning hydro-cylinder 5 and trailing wheel 4 more specifically, tensioning hydro-cylinder 5 is fixedly connected on erecting frame 22 by contiguous block 23.The rear side of this contiguous block 23 can be fixedly connected on erecting frame 22, and the middle part of its anterior end surface is provided with groove, and the movable end 52 of tensioning hydro-cylinder 5 is plugged in this groove.
In the course of the work, because movable end 52 applied thrusts of tensioning hydro-cylinder 5 are given the erecting frame 22 in trailing wheel 4 outsides, and the strength and stiffness of movable end 52 and erecting frame 22 are all bigger, therefore tensioning hydro-cylinder 5 usually weares and teares greatly because of thrust with the erecting frame 22 of trailing wheel 4, here adopt the structure that contiguous block 23 is set between tensioning hydro-cylinder 5 and erecting frame 22 supports, the rigidity of contiguous block 23 and intensity are all less than the strength and stiffness of movable end 52 and erecting frame 22, can reduce the wearing and tearing of movable end 52 and erecting frame 22 like this, and after wearing and tearing, only needing to change contiguous block 23 gets final product, need not to change the movable end 52 or the erecting frame 22 of tensioning hydro-cylinder 5, further saved the productive costs of crawler type walking mechanism.Certainly, the connection mode of above-mentioned contiguous block 23 and tensioning hydro-cylinder 5 is not limited to the connection mode of plug-in mounting, can also be other connection modes.
Please refer to Fig. 4, Fig. 4 is the structural representation of a kind of specific embodiment of construction machinery and equipment provided by the present invention.
As shown in Figure 4, the present invention also provides a kind of construction machinery and equipment, and this project machinery comprises shipment parts and the traveling gear of being located at the place ahead, chassis, and its traveling gear has adopted aforesaid crawler type walking mechanism.Because above-mentioned crawler type walking mechanism has above-mentioned technique effect, therefore, comprises that the construction machinery and equipment of this crawler type walking mechanism also has the corresponding techniques effect, does not repeat them here.
Certainly, above-mentioned construction machinery and equipment can be specially development machine.Need to prove, this paper only is concrete structure and the corresponding techniques effect that example has been introduced above-mentioned crawler type walking mechanism with the development machine, in fact, above-mentioned crawler type walking mechanism not only limits the use of in development machine, comprise crawler type walking mechanism and the construction machinery and equipment of being located at the shipment parts in crawler type walking mechanism the place ahead, for example rotary drilling rig, continuous miner etc. and be suitable for all.
More than a kind of construction machinery and equipment provided by the present invention and crawler type walking mechanism thereof are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (9)

1. crawler type walking mechanism comprises crawler belt (1), track frame (2), is located at described track frame (2) in-to-in front-wheel (3), trailing wheel (4) and tensioning hydro-cylinder (5); It is characterized in that described trailing wheel (4) is a tension wheel, described tensioning hydro-cylinder (5) is located at the rear portion of described track frame (2); The fixed end (51) of described tensioning hydro-cylinder (5) is fixedly connected on being positioned on the caterpillar block between described front-wheel (3) and the described trailing wheel (4) of described track frame (2), and its movable end (52) is connected in described trailing wheel (4).
2. crawler type walking mechanism according to claim 1 is characterized in that, described front-wheel (3) and described trailing wheel (4) are the drive wheel of described crawler type walking mechanism.
3. crawler type walking mechanism according to claim 1 is characterized in that, one in described front-wheel (3) and the described trailing wheel (4) is the drive wheel of described crawler type walking mechanism, and another person is the track adjusting wheel of described crawler type walking mechanism.
4. according to each described crawler type walking mechanism of claim 1-3, it is characterized in that the oil inlet of described tensioning hydro-cylinder (5) is connected with the pressure hydraulic fluid port of the HM Hydraulic Motor (7) of described crawler type walking mechanism.
5. according to each described crawler type walking mechanism of claim 1-3, it is characterized in that, the external stability of described trailing wheel (4) is connected with erecting frame (22), and the movable end (52) of described tensioning hydro-cylinder (5) is fixedly connected on described trailing wheel (4) by described erecting frame (22).
6. crawler type walking mechanism according to claim 5, it is characterized in that, also be provided with contiguous block (23) between described tensioning hydro-cylinder (5) and the described erecting frame (22), the movable end (52) of described tensioning hydro-cylinder (5) is connected in described erecting frame (22) by described contiguous block (23).
7. crawler type walking mechanism according to claim 6, it is characterized in that, the rear side of described contiguous block (23) is fixedly connected on described erecting frame (22), and the anterior end surface of described contiguous block (23) is provided with groove, and described movable end (52) is plugged in the described groove.
8. a construction machinery and equipment comprises shipment parts and traveling gear; It is characterized in that described traveling gear adopts as each described crawler type walking mechanism of claim 1-7.
9. construction machinery and equipment according to claim 8 is characterized in that, is specially development machine.
CN2011100524319A 2011-03-04 2011-03-04 Engineering machine and crawler-type travelling mechanism thereof Pending CN102126526A (en)

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CN2011100524319A CN102126526A (en) 2011-03-04 2011-03-04 Engineering machine and crawler-type travelling mechanism thereof

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Application Number Priority Date Filing Date Title
CN2011100524319A CN102126526A (en) 2011-03-04 2011-03-04 Engineering machine and crawler-type travelling mechanism thereof

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CN102126526A true CN102126526A (en) 2011-07-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926751A (en) * 2012-11-19 2013-02-13 北方重工集团有限公司 Split four-wheel drive traveling mechanism for heading machine
CN103062141A (en) * 2012-12-21 2013-04-24 三一重型装备有限公司 Track traveling mechanism, hydraulic system thereof and engineering machinery
CN113007159A (en) * 2021-02-09 2021-06-22 中国煤炭科工集团太原研究院有限公司 Hydraulic tensioning method, hydraulic tensioning device and continuous miner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201183540Y (en) * 2008-01-10 2009-01-21 徐州凯莫尔重工科技有限公司 Track tightening apparatus of pavement spreader
CN201517219U (en) * 2009-05-12 2010-06-30 李小祥 Caterpillar type loader digger for large slope

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201183540Y (en) * 2008-01-10 2009-01-21 徐州凯莫尔重工科技有限公司 Track tightening apparatus of pavement spreader
CN201517219U (en) * 2009-05-12 2010-06-30 李小祥 Caterpillar type loader digger for large slope

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926751A (en) * 2012-11-19 2013-02-13 北方重工集团有限公司 Split four-wheel drive traveling mechanism for heading machine
CN103062141A (en) * 2012-12-21 2013-04-24 三一重型装备有限公司 Track traveling mechanism, hydraulic system thereof and engineering machinery
CN113007159A (en) * 2021-02-09 2021-06-22 中国煤炭科工集团太原研究院有限公司 Hydraulic tensioning method, hydraulic tensioning device and continuous miner

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Application publication date: 20110720