CN204610432U - A kind of oil circuit protective gear for milling digging machine - Google Patents
A kind of oil circuit protective gear for milling digging machine Download PDFInfo
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- CN204610432U CN204610432U CN201520280917.1U CN201520280917U CN204610432U CN 204610432 U CN204610432 U CN 204610432U CN 201520280917 U CN201520280917 U CN 201520280917U CN 204610432 U CN204610432 U CN 204610432U
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Abstract
The utility model discloses a kind of oil circuit protective gear for milling digging machine, comprise oil hydraulic motor, in-line and return line, the filler opening of oil hydraulic motor is communicated with in-line, the return opening of oil hydraulic motor is communicated with return line, the front end of oil hydraulic motor is provided with the first safety valve, the filler opening of the first safety valve is communicated with in-line, the oil outlet of the first safety valve is communicated with return line, when the oil pressure on in-line is more than the first setting value, part fluid enters into return line by the first safety valve, its advantage is when milling digging machine load increasing, corresponding oil pressure will improve, when pressure is more than 25MPa, the part fluid exceeded will pass through from the first safety valve, ensure that motor bears pressure and is no more than 25MPa, when operator's misoperation, now L mouth oil-feed, fluid is stopped by one-way valve 2, motor 1 cannot be entered, therefore motor can not rotate.
Description
Technical field
The utility model relates to a kind of milling digging machine, and head is dug in the milling particularly relating to a kind of milling digging machine.
Background technique
Milling digging machine can be widely used in the excavation operations such as tunnel, road surface, irrigation canals and ditches.Milling digging machine is changed a social system by ordinary excavator to form, and the hydraulic system of the drive unit of milling digging machine stems from the hydraulic system of excavator inside in the market, but under different operating modes, inner hydraulic system can not meet the operation of drive unit.Be in particular in following some:
1, the pressure of the hydraulic system of excavator is set to 31.5MPa, and digs head in superfast running as the milling of the core drive unit of milling digging machine, and pressure more than 25MPa, not so must not have impact to operating life.
2, milling is dug head and can only be rotated toward direction, and the oil circuit of excavator controls two-wayly to commutate, and such misoperation, easily makes milling digging machine head antiport, and the drive unit of milling digging machine will damage.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of oil circuit protective gear for milling digging machine.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of oil circuit protective gear for milling digging machine, comprise oil hydraulic motor, in-line and return line, the filler opening of oil hydraulic motor is communicated with in-line, the return opening of oil hydraulic motor is communicated with described return line, the front end of oil hydraulic motor is provided with the first safety valve, the filler opening of the first safety valve is communicated with described in-line, the oil outlet of the first safety valve is communicated with described return line, when the oil pressure on in-line is more than the first setting value, part fluid enters into return line by the first safety valve.
Described return line is provided with one-way valve.
Described oil hydraulic motor includes unloading port, unloading port is communicated with by drain line with described return line, the connectivity points of drain line and return line is positioned at the front end of one-way valve, and described drain line is provided with the second safety valve, and the second described safety valve rear end is connected with fuel tank.
Compared with prior art, the utility model has the advantages that and oil circuit protective gear to be integrated on a small-sized hydraulic system with valve block assembly form, be arranged on milling and dig on head, dig head accurately to control milling.When the load of milling digging machine strengthens, corresponding oil pressure will improve, and when pressure is more than 25MPa, the part fluid exceeded will pass through from the first safety valve, ensures that motor bears pressure and is no more than 25MPa; When operator's misoperation, now L mouth oil-feed, fluid is stopped by one-way valve 2, cannot enter motor 1, and therefore motor can not rotate.Simultaneously in misoperation situation (time namely from the oil-feed of L mouth), when oil pressure is more than 2MPa, the second safety valve will be opened, and ensure that whole oil circuit pressure is no more than 2MPa, motor internal draining 5 walks around one-way valve 2, through the direct oil sump tank of L mouth.
Accompanying drawing explanation
Fig. 1 is oil circuit protective gear schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
A kind of oil circuit protective gear for milling digging machine; comprise oil hydraulic motor 1, in-line 2 and return line 3; the filler opening 11 of oil hydraulic motor 1 is communicated with in-line 2; the return opening 12 of oil hydraulic motor 1 is communicated with return line 3; the front end of oil hydraulic motor 1 is provided with the first safety valve 4; the filler opening 41 of the first safety valve 4 is communicated with in-line 2; the oil outlet 42 of the first safety valve 4 is communicated with return line 3; when the oil pressure on in-line 2 is more than the first setting value, part fluid enters into return line 3 by the first safety valve 4.Return line 3 is provided with one-way valve 5.Oil hydraulic motor 1 includes unloading port 13, unloading port 13 is communicated with by drain line 6 with return line 3, drain line 6 is positioned at the front end of one-way valve 5 with the connectivity points 7 of return line 3, drain line 6 is provided with the second safety valve 8, second safety valve 8 rear end and is connected with fuel tank 9.Concrete with reference to hydraulic schematic diagram: diagram R, L represent two hydraulic fluid ports on valve block assembly respectively, and when the oil-feed of R mouth, high pressure oil is after oil hydraulic motor effect, and its oil return, through one-way valve 5 and L mouth, directly gets back to the fuel tank of excavator.
Above the oil circuit protective gear of milling digging machine provided by the utility model is described in detail; apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment is just for helping reason the utility model and core concept.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (3)
1. the oil circuit protective gear for milling digging machine; comprise oil hydraulic motor, in-line and return line; the filler opening of oil hydraulic motor is communicated with in-line; the return opening of oil hydraulic motor is communicated with described return line; it is characterized in that the front end of oil hydraulic motor is provided with the first safety valve; the filler opening of the first safety valve is communicated with described in-line; the oil outlet of the first safety valve is communicated with described return line; when the oil pressure on in-line is more than the first setting value, part fluid enters into return line by the first safety valve.
2. a kind of oil circuit protective gear for milling digging machine according to claim 1, is characterized in that described return line is provided with one-way valve.
3. a kind of oil circuit protective gear for milling digging machine according to claim 2; it is characterized in that described oil hydraulic motor includes unloading port; unloading port is communicated with by drain line with described return line; the connectivity points of drain line and return line is positioned at the front end of one-way valve; described drain line is provided with the second safety valve, the second described safety valve rear end is connected with fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280917.1U CN204610432U (en) | 2015-05-04 | 2015-05-04 | A kind of oil circuit protective gear for milling digging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280917.1U CN204610432U (en) | 2015-05-04 | 2015-05-04 | A kind of oil circuit protective gear for milling digging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610432U true CN204610432U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520280917.1U Active CN204610432U (en) | 2015-05-04 | 2015-05-04 | A kind of oil circuit protective gear for milling digging machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN204610432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111512816A (en) * | 2020-04-29 | 2020-08-11 | 江苏赛欧智能科技有限公司 | Safety protection mechanism and method for circular saw machine of greening comprehensive maintenance vehicle |
-
2015
- 2015-05-04 CN CN201520280917.1U patent/CN204610432U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111512816A (en) * | 2020-04-29 | 2020-08-11 | 江苏赛欧智能科技有限公司 | Safety protection mechanism and method for circular saw machine of greening comprehensive maintenance vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315200 No. 1818 East Luo Luo Road, Zhenhai Town, Zhejiang, Ningbo Patentee after: NINGBO HENGTONG NUODA HYDRAULIC CO., LTD. Address before: 315200 No. 1818 East Luo Luo Road, Zhenhai Town, Zhejiang, Ningbo Patentee before: Ningbo Helm Tower Hydraulic Motor Co., Ltd. |