CN114620156B - Crawler tensioning device of cantilever type tunneling machine and using method thereof - Google Patents
Crawler tensioning device of cantilever type tunneling machine and using method thereof Download PDFInfo
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- CN114620156B CN114620156B CN202210145466.5A CN202210145466A CN114620156B CN 114620156 B CN114620156 B CN 114620156B CN 202210145466 A CN202210145466 A CN 202210145466A CN 114620156 B CN114620156 B CN 114620156B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/30—Track-tensioning means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/30—Track-tensioning means
- B62D55/305—Track-tensioning means acting on pivotably mounted idlers
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a crawler tensioning device of a cantilever type tunneling machine, which comprises a crawler chain assembly, a guide wheel connecting frame, a tensioning oil cylinder, an elastic air cylinder and a crawler frame, wherein the crawler chain assembly is arranged on the crawler chain assembly; the guide wheels are arranged between the guide wheel connecting frames, the guide wheel connecting frames are arranged at the front ends of the crawler frames in a sliding mode, and the crawler chain assembly is arranged around the guide wheels; the tensioning oil cylinder is arranged on the rear side of the guide wheel connecting frame, the elastic air cylinder and the tensioning oil cylinder are oppositely arranged between the crawler frames, and a piston rod of the elastic air cylinder is oppositely arranged with a piston rod of the tensioning oil cylinder. The combination mode of the tensioning oil cylinder and the elastic air cylinder has the advantages of simple structure, no maintenance, large tensioning force, small occupied space and stable and reliable work; the cooperation mode of elastic cylinder and tensioning hydro-cylinder guarantees the stationarity of equipment walking when meetting great resistance to protect the running part, improve walking in-process security, and prolonged the life of track running part, alleviateed the intensity of labour of on-the-spot maintenance, improved work efficiency.
Description
Technical Field
The invention relates to the technical field of crawler tensioning devices, in particular to a crawler tensioning device of a cantilever type tunneling machine and a using method of the crawler tensioning device.
Background
The crawler belt of the crawler belt walking mechanism needs to be tensioned according to design requirements, and the tension degree of the crawler belt needs to be checked every time the crawler belt works for a period of time so as to prevent the crawler belt from being worn too fast, being loosened too much and causing chain dropping and walking deviation; at present, the traditional track tensioning device in China mainly has three types: the first type is a crawler tensioning device combining a grease tensioning cylinder and a high-strength spring, the structure is mainly used on light-load engineering machinery such as small and medium-sized excavators and bulldozers, and the main problem when the crawler tensioning device is used on heavy-load engineering machinery is that required tensioning force cannot be achieved or the spring device is too large in size and has no spatial arrangement; moreover, the high-strength spring is easy to fatigue and lose efficacy, complex to maintain and high in labor intensity; the second type is an oil-gas mixed automatic tensioning device, which is generally formed by combining a hydraulic tensioning cylinder, an energy accumulator, a liquid charging and unloading valve, a hydraulic pipeline and the like, has a buffering function, is used on a large crawler paver and a large excavator, and has the problems of complex structure, high price, multiple fault points and difficult maintenance; the third method is a compromise method for many manufacturers, adopts a mode of directly tensioning by additionally arranging a tensioning yellow oil cylinder and a clamping plate, has low cost, and is commonly found on domestic cantilever type development machines. However, the tensioning device does not have a buffering function, when the crawler runs under large resistance, the tensioning device cannot effectively slow down impact to protect a crawler running mechanism, and particularly the heavy engineering machine such as a hard rock cantilever type tunneling machine is severe in working environment and difficult in field maintenance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a crawler tensioning device of a cantilever type tunneling machine and a using method thereof, wherein the crawler tensioning device is compact in structure and large in tensioning force, can effectively buffer and protect a crawler travelling mechanism, is free of maintenance for a long time, prolongs the service life of the crawler travelling mechanism and improves the operation rate of equipment.
The technical scheme adopted by the invention is as follows:
a crawler tensioning device of a cantilever type tunneling machine comprises a crawler chain assembly, a guide wheel connecting frame, a tensioning oil cylinder, an elastic air cylinder and a crawler frame;
the guide wheels are arranged between the guide wheel connecting frames, the guide wheel connecting frames are arranged at the front ends of the crawler frames in a sliding mode, and the crawler chain assembly is arranged around the guide wheels; the tensioning oil cylinder is arranged at the rear side of the guide wheel connecting frame, the elastic air cylinder and the tensioning oil cylinder are oppositely arranged between the crawler frame, and a piston rod of the elastic air cylinder is oppositely arranged with a piston rod of the tensioning oil cylinder;
the tensioning oil cylinder comprises a mounting seat A, a cylinder barrel A, a sealing assembly A, a piston rod A and a grease injection port assembly; the tensioning oil cylinder is installed on the guide wheel connecting frame through an installation seat A, the cylinder barrel A is connected with the installation seat A in a matching mode, the installation seat A and the cylinder barrel A form a cylindrical structure with one open end, the piston rod A is arranged in the cylinder barrel A, the sealing assembly A is arranged between the outer edge of the piston rod A and the inner wall of the cylinder barrel, the grease injection port assembly is arranged on the installation seat A, and the grease injection port assembly is communicated with the inner cavity of the cylinder barrel A;
the elastic cylinder comprises a mounting seat B, a cylinder barrel B, an end cover, a piston rod B, a silencer, an inflation valve and a sealing assembly B; the elastic cylinder is arranged on the crawler frame through an installation seat B installation rod, the cylinder barrel B is connected with the installation seat B in a matching mode, and the installation seat B and the cylinder barrel B form a cylindrical structure with one open end; an inflation channel which is communicated with the inner cavity of the cylinder barrel B is arranged on the mounting seat B, and the inflation valve is arranged at an air inlet of the inflation channel of the mounting seat B; the piston rod B is arranged in the cylinder barrel B through an end cover, and the silencer is arranged on the end cover; the sealing components B are respectively arranged between the cylinder barrel and the connecting seat B, between the outer edge of the piston rod B and the inner wall of the cylinder barrel B and between the end cover and the piston rod B.
Specifically, the tensioning oil cylinder is a grease cylinder, and the grease injection port assembly is externally connected with a grease gun.
Specifically, the sealing assembly A is a multi-stage sealing structure and comprises a supporting ring for a shaft, a Stent seal, a rod dynamic seal, a dust ring and an O-shaped ring.
Specifically, the rear end and the front end outer edge of the piston rod B are respectively provided with a step structure, the rear end step structure corresponds to the inflation channel of the mounting seat B, and the front end outer edge step structure is matched with the inner diameter of the end cover.
Specifically, the piston rod B and the connecting seat are both provided with inner cavities for improving the air inflation amount.
Specifically, the sealing assembly B is a multi-stage sealing structure and comprises a hole supporting ring, an O-shaped ring, a hole Stent seal and a piston dynamic seal.
A use method of a crawler tensioning device of a cantilever type tunneling machine comprises the following specific steps:
the method comprises the following steps: before installation, high-pressure gas is filled into the elastic cylinder barrel through the inflation valve;
step two: before the equipment normally moves, a track needs to be tensioned, a grease gun is controlled to inject grease into a tensioning oil cylinder through a grease injection port assembly, a piston rod A is pushed to extend out, the piston rod A is propped against a piston rod B of an elastic air cylinder, under the action of reaction force, a guide wheel connecting frame drives a guide wheel to move in the direction opposite to the direction in which the piston rod A extends out, a track chain is tensioned, and when the tension degree of the track chain meets the requirement, the oil injection to the tensioning oil cylinder is stopped;
step three: in the advancing process, when large resistance suddenly appears, the piston rod A of the tensioning oil cylinder applies instantaneous pressure to the piston rod B of the elastic air cylinder, and the piston rod B contracts to reduce advancing impact;
step four: in the process of resistance attenuation, the piston rod B of the elastic cylinder is gradually recovered, and the track chain is recovered to be in a real-time tensioning state, so that chain dropping is avoided.
Due to the adoption of the technical scheme, the invention has the following advantages:
the combination mode of the tensioning oil cylinder and the elastic air cylinder has the advantages of simple structure, no maintenance, large tensioning force, small occupied space and stable and reliable work; the cooperation mode of elastic cylinder and tensioning hydro-cylinder guarantees the stationarity of equipment walking when meetting great resistance to protect the running part, improve walking in-process security, and prolonged the life of track running part, alleviateed the intensity of labour of on-the-spot maintenance, improved work efficiency.
Drawings
Fig. 1 is an overall schematic view of the present invention.
Fig. 2 is a schematic view in a top view of fig. 1.
Figure 3 is a cross-sectional schematic view of the tensioning cylinder of the present invention.
Fig. 4 is a schematic cross-sectional view of the elastic cylinder of the present invention.
In the figure: the track comprises a track chain assembly 1, a guide wheel 2, a guide wheel connecting frame 3, a tensioning oil cylinder 4, a mounting seat A41, a cylinder barrel A42, a sealing component A43, a piston rod A44, a grease injection port component 45, an elastic air cylinder 5, a mounting seat B51, an air inflation channel 511, a cylinder barrel B52, an end cover 53, a piston rod B54, a silencer 55, an air inflation valve 56, a sealing component B57 and a track frame 6.
Detailed Description
The invention is further explained below with reference to the drawings and examples, which do not limit the scope of the invention, and the purpose of disclosing the invention is to protect all technical improvements within the scope of the invention.
The crawler tensioning device of the cantilever type excavator with reference to the attached drawings 1-4 comprises a crawler chain assembly 1, a guide wheel 2, a guide wheel connecting frame 3, a tensioning oil cylinder 4, an elastic air cylinder 5 and a crawler frame 6.
The guide wheels 2 are arranged between the guide wheel connecting frames 3, the guide wheel connecting frames 3 are arranged at the front ends of the crawler frames 6 in a sliding mode, and the crawler chain assembly 1 is arranged around the guide wheels 2; the tensioning oil cylinder 4 is arranged at the rear side of the guide wheel connecting frame 3, the elastic air cylinder 5 and the tensioning oil cylinder 4 are oppositely arranged between the crawler frames 6, and a piston rod of the elastic air cylinder 5 is oppositely arranged with a piston rod of the tensioning oil cylinder 4.
The embodiment adopts the tensioning oil cylinder 4 with the allowable working pressure of 59.5MPa, the test pressure of 86MPa, the outer diameter of 224mm and the stroke of 170mm, wherein the tensioning oil cylinder 4 comprises a mounting seat A41, a cylinder barrel A42, a sealing assembly A43, a piston rod A44 and a grease injection port assembly 45; the tensioning oil cylinder 4 is installed on the guide wheel connecting frame 3 through an installation seat A41, a cylinder barrel A42 is connected with the installation seat A41 in a matching mode, the installation seat A41 and the cylinder barrel A42 form a cylindrical structure with one open end, a piston rod A44 is arranged in the cylinder barrel A42, a sealing assembly A43 is arranged between the outer edge of the piston rod A44 and the inner wall of the cylinder barrel, the sealing assembly A43 is a multi-stage sealing structure, and the sealing assembly A43 comprises a bearing ring for a shaft, a step seal, a rod dynamic seal, a dust ring and an O-shaped ring; the grease injection port assembly 45 is arranged on the mounting seat A41, and the grease injection port assembly 45 is communicated with the inner cavity of the cylinder barrel A42; the tensioning oil cylinder 4 is a yellow oil cylinder, and the grease injection port assembly 45 is externally connected with a yellow oil gun.
The embodiment adopts the pre-tightening load of 600KN, the maximum load of 1200KN and the maximum volume of 3.8dm 3 Minimum volume of 1.9 dm 3 The elastic cylinder 5 has the allowable working pressure of 47MPa and the test pressure of 67.2MPa, and the elastic cylinder 5 comprises a mounting seat B51, a cylinder barrel B52, an end cover 53, a piston rod B54, a silencer 55, an inflation valve 56 and a sealing component B57; the elastic cylinder 5 is arranged on the crawler frame 6 through an installation seat B51 installation rod, the cylinder barrel B52 is connected with the installation seat B51 in a matching way, and the installation seat B51 and the cylinder barrel B52 form a cylindrical structure with one open end; the mounting seat B51 is provided with an inflation channel 511 which is communicated with the inner cavity of the cylinder barrel B52, and the inflation valve 56 is arranged at an air inlet of the inflation channel 511 of the mounting seat B51; the piston rod B54 is arranged in the cylinder barrel B52 through the end cover 53, the rear end and the front end outer edge of the piston rod B54 are respectively provided with a step structure, the rear end step structure corresponds to the inflation channel 511 of the mounting seat B51, the front end outer edge step structure is matched with the inner diameter of the end cover 53, and the piston rod B54 and the connecting seat are respectively provided with an inner cavity for improving the inflation quantity; the muffler 55 is provided on the end cap 53; the sealing components B57 are respectively arranged between the cylinder barrel and the connecting seat B, between the outer edge of the piston rod B54 and the inner wall of the cylinder barrel B52 and between the end cover 53 and the piston rod B54; the sealing component B57 is a multi-stage sealing structure, and the sealing component B57 comprises a hole supporting ring, an O-shaped ring, a hole Steer seal and a piston dynamic seal.
A use method of a crawler tensioning device of a cantilever type tunneling machine comprises the following specific steps:
the method comprises the following steps: before installation, 23.5Mpa high-pressure gas is filled into the cylinder barrel of the elastic cylinder 5 through the charging valve 56;
step two: before the equipment normally moves, a track needs to be tensioned, a grease gun is controlled to inject grease into a tensioning oil cylinder 4 through a grease injection port assembly 45, a piston rod A44 is pushed to extend out, the piston rod A44 is propped against a piston rod B54 of an elastic cylinder 5, under the action of a reaction force, a guide wheel connecting frame 3 drives a guide wheel 2 to move in the direction opposite to the extending direction of the piston rod A44, a track chain is tensioned, and when the tension degree of the track chain meets the requirement, oil injection into the tensioning oil cylinder 4 is stopped;
step three: in the process of advancing, when meeting suddenly appearing large resistance, the piston rod A44 of the tensioning oil cylinder 4 applies instantaneous pressure to the piston rod B54 of the elastic cylinder 5, and the piston rod B54 contracts to reduce advancing impact;
step four: in the process of resistance attenuation, the piston rod B54 of the elastic cylinder 5 is gradually recovered, and the track chain is recovered to a real-time tensioning state, so that chain dropping is avoided.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (6)
1. The use method of the crawler tensioning device of the cantilever type tunneling machine is characterized by comprising the following specific steps:
the method comprises the following steps: before installation, high-pressure gas is filled into the elastic cylinder barrel through the inflation valve;
step two: before the equipment normally moves, a track needs to be tensioned, a grease gun is controlled to inject grease into a tensioning oil cylinder through a grease injection port assembly, a piston rod A is pushed to extend out, the piston rod A is propped against a piston rod B of an elastic air cylinder, under the action of reaction force, a guide wheel connecting frame drives a guide wheel to move in the direction opposite to the direction in which the piston rod A extends out, a track chain is tensioned, and when the tension degree of the track chain meets the requirement, the oil injection to the tensioning oil cylinder is stopped;
step three: in the advancing process, when large resistance suddenly appears, the piston rod A of the tensioning oil cylinder applies instantaneous pressure to the piston rod B of the elastic air cylinder, and the piston rod B contracts to reduce advancing impact;
step four: in the process of resistance attenuation, a piston rod B of the elastic cylinder is gradually recovered, and the crawler chain is recovered to a real-time tensioning state, so that chain dropping is avoided;
the crawler tensioning device of the cantilever type tunneling machine comprises a crawler chain assembly, a guide wheel connecting frame, a tensioning oil cylinder, an elastic air cylinder and a crawler frame;
the guide wheels are arranged between the guide wheel connecting frames, the guide wheel connecting frames are arranged at the front ends of the crawler frames in a sliding mode, and the crawler chain assembly is arranged around the guide wheels; the tensioning oil cylinder is arranged at the rear side of the guide wheel connecting frame, the elastic air cylinder and the tensioning oil cylinder are oppositely arranged between the crawler frames, and a piston rod of the elastic air cylinder is oppositely arranged with a piston rod of the tensioning oil cylinder;
the tensioning oil cylinder comprises a mounting seat A, a cylinder barrel A, a sealing assembly A, a piston rod A and a grease injection port assembly; the tensioning oil cylinder is installed on the guide wheel connecting frame through an installation seat A, the cylinder barrel A is connected with the installation seat A in a matching mode, the installation seat A and the cylinder barrel A form a cylindrical structure with one open end, the piston rod A is arranged in the cylinder barrel A, the sealing assembly A is arranged between the outer edge of the piston rod A and the inner wall of the cylinder barrel, the grease injection port assembly is arranged on the installation seat A, and the grease injection port assembly is communicated with the inner cavity of the cylinder barrel A;
the elastic cylinder comprises a mounting seat B, a cylinder barrel B, an end cover, a piston rod B, a silencer, an inflation valve and a sealing assembly B; the elastic cylinder is arranged on the crawler frame through an installation seat B installation rod, the cylinder barrel B is connected with the installation seat B in a matching mode, and the installation seat B and the cylinder barrel B form a cylindrical structure with one open end; an inflation channel which is communicated with the inner cavity of the cylinder barrel B is arranged on the mounting seat B, and the inflation valve is arranged at an air inlet of the inflation channel of the mounting seat B; the piston rod B is arranged in the cylinder barrel B through an end cover, and the silencer is arranged on the end cover; the sealing components B are respectively arranged between the cylinder barrel and the connecting seat B, between the outer edge of the piston rod B and the inner wall of the cylinder barrel B and between the end cover and the piston rod B.
2. The method of using a boom miner track tensioner as in claim 1 wherein: the tensioning oil cylinder is a grease cylinder, and the grease injection port assembly is externally connected with a grease gun.
3. The method of using a boom miner track tensioning device of claim 1, wherein: the sealing assembly A is a multi-stage sealing structure and comprises a supporting ring for a shaft, a Stent seal, a rod dynamic seal, a dust ring and an O-shaped ring.
4. The method of using a boom miner track tensioning device of claim 1, wherein: and step structures are arranged on the rear end and the front end outer edge of the piston rod B, the rear end step structure corresponds to the inflation channel of the mounting seat B, and the front end outer edge step structure is matched with the inner diameter of the end cover.
5. The method of using a boom miner track tensioning device of claim 1, wherein: piston rod B and connecting seat all be provided with the inner chamber that is used for improving the aeration rate.
6. The method of using a boom miner track tensioner as in claim 1 wherein: the sealing assembly B is a multi-stage sealing structure and comprises a hole supporting ring, an O-shaped ring, a hole Steckel seal and a piston dynamic seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210145466.5A CN114620156B (en) | 2022-02-17 | 2022-02-17 | Crawler tensioning device of cantilever type tunneling machine and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210145466.5A CN114620156B (en) | 2022-02-17 | 2022-02-17 | Crawler tensioning device of cantilever type tunneling machine and using method thereof |
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| Publication Number | Publication Date |
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| CN114620156A CN114620156A (en) | 2022-06-14 |
| CN114620156B true CN114620156B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210145466.5A Active CN114620156B (en) | 2022-02-17 | 2022-02-17 | Crawler tensioning device of cantilever type tunneling machine and using method thereof |
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| JP2000095160A (en) * | 1998-09-24 | 2000-04-04 | Kubota Corp | Tension device for crawler |
| CN101767612A (en) * | 2010-01-29 | 2010-07-07 | 太原重工股份有限公司 | Large mineral track tensioning device of hydraulic excavator |
| CN102717843A (en) * | 2012-06-14 | 2012-10-10 | 中联重科股份有限公司渭南分公司 | Crawler tensioning device, crawler travelling mechanism and hydraulic excavator |
| CN202657135U (en) * | 2012-06-06 | 2013-01-09 | 中联重科股份有限公司渭南分公司 | Track tensioning device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004314938A (en) * | 2003-03-31 | 2004-11-11 | Komatsu Ltd | Crawler tension adjusting device |
| CN201241890Y (en) * | 2008-08-19 | 2009-05-20 | 孙光锋 | Single-acting multiplying-power air cylinder |
| CN102152816A (en) * | 2011-03-22 | 2011-08-17 | 三一重机有限公司 | Caterpillar tensioning and buffering device for caterpillar type walking machinery |
| US20140284996A1 (en) * | 2014-06-09 | 2014-09-25 | Caterpillar Inc. | Idler assembly for a track roller frame |
| CN204472943U (en) * | 2014-12-30 | 2015-07-15 | 阿特拉斯工程机械有限公司 | Track tensioning device of hydraulic excavator |
| CN110329376A (en) * | 2019-07-26 | 2019-10-15 | 徐州徐工随车起重机有限公司 | From walking crane crawler belt regulating device |
| CN215398982U (en) * | 2021-07-21 | 2022-01-04 | 宜昌三一机械有限公司 | Hydraulic excavator rises and tightly installs |
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2022
- 2022-02-17 CN CN202210145466.5A patent/CN114620156B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000095160A (en) * | 1998-09-24 | 2000-04-04 | Kubota Corp | Tension device for crawler |
| CN101767612A (en) * | 2010-01-29 | 2010-07-07 | 太原重工股份有限公司 | Large mineral track tensioning device of hydraulic excavator |
| CN202657135U (en) * | 2012-06-06 | 2013-01-09 | 中联重科股份有限公司渭南分公司 | Track tensioning device |
| CN102717843A (en) * | 2012-06-14 | 2012-10-10 | 中联重科股份有限公司渭南分公司 | Crawler tensioning device, crawler travelling mechanism and hydraulic excavator |
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