CN107604872B - Front shovel floating pressure automatic adjusting device of snow remover - Google Patents
Front shovel floating pressure automatic adjusting device of snow remover Download PDFInfo
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- CN107604872B CN107604872B CN201711035429.4A CN201711035429A CN107604872B CN 107604872 B CN107604872 B CN 107604872B CN 201711035429 A CN201711035429 A CN 201711035429A CN 107604872 B CN107604872 B CN 107604872B
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- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010408 sweeping Methods 0.000 description 4
- 244000007853 Sarothamnus scoparius Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
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Abstract
The front shovel floating pressure automatic adjusting device of the snow remover comprises a vehicle chassis connecting mechanism, wherein a lifting oil cylinder is arranged on the vehicle chassis connecting mechanism; the front shovel bracket is connected with the lifting cylinder at a position corresponding to the left side of the connection of the vehicle chassis, and wheels are respectively arranged at the bottoms of the two ends of the front shovel bracket in the long side direction; the front shovels are hinged on the front shovel bracket along the left side of the long side direction of the front shovel bracket; the front shovel floating pressure automatic adjusting device comprises a hydraulic control station arranged on a snow remover body, wherein the hydraulic control station is connected with a hydraulic oil way of a lifting oil cylinder and a vehicle-mounted controller of the snow remover, and is characterized in that: the hydraulic oil circuit of the hydraulic control station and the hydraulic oil circuit of the lifting oil cylinder is provided with a lifting oil cylinder working pressure sensing sensor for sensing the pressure of the lifting oil cylinder, and the lifting oil cylinder working pressure sensing sensor is connected with the vehicle-mounted controller. The wheels used for supporting the front shovel support are guaranteed to obtain good ground pressure, and snow shoveling effect of a group of front shovels is guaranteed.
Description
Technical Field
The invention belongs to the technical field of snow removing facilities of airports and roads, and particularly relates to a front shovel floating pressure automatic adjusting device of a snow remover.
Background
In snowfall, if snow on airports, particularly on airplane take-off and landing runways, cannot be timely removed, normal take-off and landing of the airplane can be affected and even safety accidents can be caused. In this way, the snow remover for the airport becomes an indispensable facility for the airport, in particular for military and civil airports in northern areas of China.
Technical information about snow throwers can be found in published chinese patent literature, such as document a: CN201520951U recommends a front wheel drive middle snow sweeping roller brush type airport snow sweeping vehicle; document B:202705979U is provided with "an airport, highway snow remover"; document C: CN103362097a describes "a multifunctional snow breaker"; document D: CN204163041U discloses "an airport snow plow", etc.; document E: CN101694092B "airport snow thrower", and the like.
As is clear from a reading of the patent literature, which is not limited to the above, a structure system as a snow remover generally includes a chassis, a front shovel or a "snow pushing mechanism" (also referred to as a "snow pushing shovel") located at a front lower side of a vehicle head, a roller broom (also referred to as a "roller brush", hereinafter the same) located at a lower side of a middle portion of the chassis, and a sweeping mechanism located at a rear portion of a vehicle, snow on the ground is pushed by the front shovel, and then residual snow is swept by the roller brush of the roller brush, and then the residual snow left when the roller brush is swept is blown by the sweeping mechanism, and snow on a floor of an airport can be substantially and fully cleared through three snow removal processes, and road snow removal is the same.
According to the common general knowledge, the lower edge of the front shovel cannot be in contact with the terrace, more specifically, a reasonable gap is kept between the lower edge of the front shovel blade, namely the snow shovel blade, arranged on the lower edge of the front shovel and the terrace, otherwise, the snow pushing shovel and the airport terrace are damaged, and therefore residual snow smaller than 10mm can still be left on the airport terrace after the front shovel shovels snow and is swept by the roller broom, namely the rolling brush.
In order to maintain a reasonable distance between the front shovel and the terrace as above, which is less than 10mm, pressure is usually applied to a front shovel support for mounting the front shovel by a lifting cylinder of a structural system of a vehicle chassis connecting mechanism connected with a vehicle chassis (the front shovel support is connected with a lifting cylinder column of the lifting cylinder), and the front shovel support is supported by a front shovel support supporting and traveling mechanism (namely, a snow pushing device of the multifunctional snow remover) which is recommended by Chinese patent publication No. CN105040625A, because the front shovel support is supported by the front shovel support supporting and traveling mechanism, which is basically formed by the lifting cylinder, the wheels corresponding to the bottoms of the two ends of the front shovel support and the bottoms of the two ends of the front shovel support are rotationally applied to the ground. In addition, since the front shovel is hinged to the front shovel bracket through the upper and lower connecting rods, and floats up and down and swings back and forth during the working process, the front shovel floats and presses substantially as the front shovel pressure, which can be understood from the reading of CN105040625 a.
In theory, as long as the pressure of the lift cylinder (hydraulic oil pressure) is maintained at a certain value, for example, 2MPa, the distance between the front shovel and the terrace can be ensured, but various situations often occur in the actual snow removing process of the snow remover, and typical examples of such different situations are as follows: the thickness of snow accumulated on the ground varies with the magnitude of the snowfall, the length of the snowfall time, the outdoor ambient temperature, the thickness of the snow layer in the same background, etc., so that if the ground pressure applied to the wheel by the lift cylinder is considered only theoretically, it can be considered as blind because the pressure of the lift cylinder varies during the snow shoveling of the front shovel, and it is difficult to always maintain a preset pressure level. In view of this, if the wheel is too small to the ground pressure, snow shoveling effect is poor, if the wheel is too large to the ground pressure, the front car wheel of the vehicle is lightened to the ground pressure, the propulsion performance of the snow remover is affected, and the front shovel structure is easily damaged due to the large load caused by the too large pressure.
In summary, in the snow removing process of the snow remover, the above-mentioned drawbacks can be avoided only by always ensuring the ground pressure of the wheels of the structural system of the front shovel bracket supporting the travelling mechanism, however, the technical teachings which can be used for reference are not found in the middle-outer patent and the non-patent documents disclosed so far, and the technical proposal to be described below is generated under the background.
Disclosure of Invention
The invention aims to provide a front shovel floating pressure automatic adjusting device of a snow remover, which is beneficial to dynamically detecting the pressure change of a lifting oil cylinder and keeping the pressure of the lifting oil cylinder at a set pressure value all the time so as to ensure that wheels used for supporting a front shovel bracket obtain good ground pressure, avoid the reaction force of a front shovel caused by snow thickness from jumping and ensure the snow shoveling effect of the front shovel.
The invention aims to achieve the aim, in particular to a front shovel floating pressure automatic adjusting device of a snow remover, wherein the snow remover comprises a vehicle chassis connecting mechanism connected with the front of a chassis of a snow remover body, and a lifting oil cylinder is arranged on the vehicle chassis connecting mechanism; the front shovel bracket is connected with the lifting oil cylinder at a position corresponding to the left side of the vehicle chassis connecting mechanism, and wheels are respectively arranged at the bottoms of the two ends of the front shovel bracket in the long side direction; a group of front shovels hinged to the front shovel bracket in a state of being next to each other along the left side of the long side direction of the front shovel bracket; the front shovel floating pressure automatic adjusting device comprises a hydraulic control station arranged on a snow remover body, wherein the hydraulic control station is connected with a lifting oil cylinder hydraulic oil way and is electrically controlled and connected with a vehicle-mounted controller of the snow remover.
In a specific embodiment of the present invention, the right sides of the set of front shovels are each hinged to the left side of the front shovel bracket by a front shovel upper connecting rod and a front shovel lower connecting rod.
In another specific embodiment of the present invention, a front shovel blade is fixed to the lower portion of each of the front shovels.
In a further specific embodiment of the present invention, the lift cylinder has an upper cylinder chamber and a lower cylinder chamber, the upper and lower cylinder chambers are separated by a cylinder column piston of a cylinder column of the lift cylinder, the hydraulic control station includes a tank, an oil pump, a first valve block, a second valve block, an overflow valve, a pressure loading valve, a first reversing valve, a second reversing valve, a solenoid valve, an electromagnetic overflow valve and a throttle valve, the oil tank is disposed on the body of the snow remover, the oil pump is disposed on the oil tank, an oil pump inlet of the oil pump is communicated with the oil tank by an oil pump inlet pipe, an oil pump outlet of the oil pump is connected with the first reversing valve by an oil pump outlet pipe, the overflow valve, the pressure loading valve and the second reversing valve are disposed on the first valve block, the overflow valve is also communicated with the oil tank return pipe and the oil pump outlet pipe, the first reversing valve is communicated with the solenoid valve by the first reversing valve, the second valve is also communicated with the oil tank return pipe by the second reversing valve, and the overflow valve is also communicated with the second reversing valve by the third reversing valve and the electromagnetic valve by the second reversing valve; the front shovel bracket is connected with the oil cylinder column; the lifting oil cylinder working pressure sensing sensor is connected with the third pipeline through a pressure sensing sensor oil pipe at a position corresponding to the position between the lifting oil cylinder and the electromagnetic overflow valve.
In still another specific embodiment of the present invention, an oil filter is provided at a position corresponding to an oil inlet of the oil pump.
In yet another specific embodiment of the present invention, the third pipeline is communicated with an upper cylinder cavity of the lifting cylinder, and the fifth pipeline is communicated with a lower cylinder cavity of the lifting cylinder.
According to the technical scheme, as the lifting cylinder working pressure sensing sensor is arranged on the hydraulic oil path connected with the lifting cylinder hydraulic oil path of the hydraulic control station, the pressure change of the lifting cylinder is dynamically sensed by the lifting cylinder working pressure sensing sensor, when the pressure of the lifting cylinder exceeds or is lower than a pressure set value, the pressure of the lifting cylinder is always maintained at the set pressure value degree by the working of the hydraulic control station, so that the wheels for supporting the front shovel bracket can obtain good ground pressure, and the jump of a group of front shovels due to the reaction force caused by the thickness of snow is avoided, thereby ensuring the snow shoveling effect of a group of front shovels.
Drawings
FIG. 1 is a schematic representation of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the hydraulic control station and lift cylinder of the present invention and the hydraulic circuit connection of the lift cylinder operating pressure sensor and the hydraulic control station.
Fig. 3 is a schematic view of the lift cylinder shown in fig. 2 with oil returned from the upper chamber and oil fed from the lower chamber.
Detailed Description
In order to make the technical spirit and advantages of the present invention more clearly understood, the applicant will now make a detailed description by way of example, but the description of the examples is not intended to limit the scope of the invention, and any equivalent transformation made merely in form, not essentially, according to the inventive concept should be regarded as the scope of the technical solution of the present invention.
In the following description, any reference to the directional or azimuthal sense of up, down, left, right, front and rear is not to be construed as a specific limitation on the solution provided by the present invention, since the figure being described is in a positional state.
Referring to fig. 1, there is shown a vehicle chassis connecting mechanism 2 of a structural system of a snow remover connected to a front of a chassis 11 of a snow remover vehicle body 1, a lift cylinder 21 being provided on the vehicle chassis connecting mechanism 2; a front shovel bracket 3, the front shovel bracket 3 is connected with the lifting cylinder 21 at a position corresponding to the left side of the vehicle chassis connecting mechanism 2, and wheels 31 are respectively arranged at the bottoms of the two ends of the front shovel bracket 3 in the long side direction; a group of front shovels 4, the group of front shovels 4 being hinged to the front shovel frame 3 in a state of being next to each other along the left side of the longitudinal direction of the front shovel frame 3. Since the aforementioned structure of the snow remover belongs to the prior art, see, for example, patent literature mentioned in the background section above by the applicant, in particular CN105040625a, the applicant will not develop a description.
Referring to fig. 2, fig. 2 shows a hydraulic control station 5 provided on the snow remover vehicle body 1 of the structure system of the front shovel float pressure automatic adjusting device, and the hydraulic control station 5 is connected with the hydraulic oil path of the lifting oil cylinder 21 and is electrically controlled and connected with the vehicle-mounted controller of the snow remover.
The technical key points of the technical scheme provided by the invention are as follows: a lift cylinder operation pressure sensor 6 for sensing the pressure of the lift cylinder 21 is provided on a hydraulic oil path where the hydraulic control station 5 is connected to the hydraulic oil path of the lift cylinder 21, and the lift cylinder operation pressure sensor 6 is electrically connected to the vehicle-mounted controller.
As shown in fig. 1, the right side of the front shovel 4 is hinged to the left side of the front shovel bracket 3 by a front shovel upper link 41 and a front shovel lower link 42, and a front shovel blade 43 is fixed to the lower portion of the front shovel 4.
As shown in fig. 2, the lift cylinder 21 has an upper cylinder chamber 211 and a lower cylinder chamber 212, the upper and lower cylinder chambers 211, 212 are partitioned by a cylinder column piston 2131 of a cylinder column 213 of the lift cylinder 21, the hydraulic control station 5 includes a tank 51, an oil pump 52, a first valve block 53, a second valve block 54, a relief valve 55a, a pressure loading valve 55b, a first reversing valve 55c, a second reversing valve 55d, a solenoid valve 55e, an electromagnetic relief valve 55f and a throttle valve 55g, the tank 51 is provided on the snow breaker body 1, the oil pump 52 is provided on the tank 51, an oil pump inlet of the oil pump 52 is communicated with the tank 51 by an oil pump inlet pipe 521, an oil pump outlet of the oil pump 52 is connected with the first reversing valve 55c by an oil pump outlet pipe 522, the relief valve 55a, the pressure loading valve 55b, the first reversing valve 55c and the second reversing valve 55d are provided on the first reversing valve block 53, relief valve 55a communicates with tank return line 511 of tank 51 and with aforementioned pump outlet line 522, pressure-loading valve 55b communicates with tank return line 511 and pump outlet line 522 as well, first switching valve 55c communicates with pump outlet line 522 and with solenoid valve 55e via first line 56a, second switching valve 55d communicates with tank return line 511 via second line 56b and also communicates with upper cylinder chamber 211 of aforementioned lift cylinder 21 via third line 56c, solenoid valve 55e, solenoid relief valve 55f and throttle valve 55g are provided on second valve block 54, solenoid valve 55e communicates with throttle valve 55g via fourth line 56d, and solenoid valve 55g communicates with lower cylinder chamber 212 of lift cylinder 21 via fifth line 56e, solenoid relief valve 55f communicates with aforementioned third line 56c and solenoid relief valve 55f also communicates with aforementioned tank return line 511 via sixth line 56f, the first valve block 53 and the second valve block 54 are provided at the upper portion of the oil tank 51; the front shovel bracket 3 is connected to the cylinder column 213; the lift cylinder operating pressure sensor 6 is connected to the third line 56c through a pressure sensor oil pipe 61 at a position corresponding to between the lift cylinder 21 and the electromagnetic spill valve 55 f.
Preferably, an oil filter 523 is provided at a position corresponding to an oil inlet of the aforementioned oil pump 52.
As shown in fig. 2, the third line 56c communicates with the upper chamber 211 of the lift cylinder 21, and the fifth line 56e communicates with the lower chamber 212 of the lift cylinder 21.
The applicant has described in connection with figures 1 and 2 and by way of example a set of front shovels 4 descending, in the figures by means of dot-dash arrows, i.e. by means of dashed arrowsOil return is indicated, and oil intake is indicated by a solid arrow "→". When the front shovel 4 is lowered, the oil pump 52 of the hydraulic control station 5 is operated by the PLC (programmable logic controller) of the above-described vehicle-mounted controller, and at this time, the pressure-loading solenoid valve 55b is electrically closed (normally in an open state and returns oil to the oil tank 51 through the oil tank return pipe 511), the second reversing valve 55d is opened, the solenoid valve 55e and the electromagnetic spill valve 55f are opened, and the pressure set by the electromagnetic spill valve 55f is 2MPa. At this time, the high pressure oil from the oil pump 52 enters the first reversing valve 55c through the oil pump outlet pipe 522, then enters the upper cylinder chamber 211 above the cylinder column piston 2131 of the lift cylinder 21 through the third pipe 56c, pushes the cylinder column 213 to move downward, and at this time, the hydraulic oil in the lower cylinder chamber 212 sequentially passes through the fifth pipe 56e, the throttle valve 55g, the fourth pipe 56d, the electromagnetic valve 55e, the first pipe 56a, the first reversing valve 55c, the second pipe 56b and the tank return pipe 511, and enters the oil tank 51. In the foregoing process, when the pressure of the pressure oil outputted from the oil pump 52 is excessively large, i.e., exceeds 2MPa, electricity is supplied to the oil pathThe magnetic relief valve 55f is opened (against the internal spring pressure), and the oil returns to the oil pipe 51 through the sixth pipeline 56f and the oil tank oil return pipe 511 in order, so that the lift cylinder 21 always maintains a certain earth pressure, that is, the lift cylinder 21 forces the wheel 31 to generate a certain earth pressure, and the earth acting force is 7000N-10000N. That is, the oil pressure in the lower cylinder chamber of the lift cylinder, that is, the lower cylinder chamber 212 of the lift cylinder 2, is always kept at about 2MPa, and the ground pressure of the front shovel 4 is increased to 7000-10000N, so that the snow shoveling effect is prevented from being affected by the lifting of the front shovel 4 due to the thick snow resistance (also referred to as "pressure") during snow shoveling.
Referring to fig. 3, and in conjunction with fig. 1, a set of front shovel 4 is illustrated as ascending, and the arrows in fig. 3 are meant as described with respect to fig. 2. When the front shovel 4 is lifted, the directions of high-pressure oil and oil return are shown in fig. 3, specifically: the solenoid valve 55e is closed by a command of the PLC of the vehicle-mounted controller, the second reversing valve 55d reverses, and the pressure oil pumped by the oil pump 52 sequentially passes through the oil pump outlet pipe 522, the second reversing valve 55d, the first pipeline 56a, the solenoid valve 55e, the fourth pipeline 56d, the throttle valve 55g and the fifth pipeline 56e, enters the lower cylinder cavity 212 of the lifting oil cylinder 21, and the oil cylinder column 213 ascends. The oil in the upper cylinder chamber 211 of the lift cylinder 21 returns to the oil tank through the third pipe 56c, the second reversing valve 55d, the second pipe 56b, and the oil tank return pipe 511 in this order.
The upper cylinder cavity 211 of the lift cylinder 21 is filled with oil and the lower cylinder cavity 212 is filled with oil, or the lower cylinder cavity 212 is filled with oil and the upper cylinder cavity 211 is filled with oil, that is, the downward or upward displacement of the cylinder column 213 depends on the pressure of the third pipeline 56c sensed by the lift cylinder working pressure sensing sensor 6, and then a signal is fed back to the vehicle-mounted controller, and the vehicle-mounted controller sends an instruction to the hydraulic control station 5 after obtaining the signal from the lift cylinder working pressure sensor 6.
In summary, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the task of the invention, and faithfully honors the technical effects carried by the applicant in the technical effect column above.
Claims (4)
1. The front shovel floating pressure automatic adjusting device of the snow remover comprises a vehicle chassis connecting mechanism (2) connected with the front of a chassis (11) of a snow remover body (1), wherein a lifting oil cylinder (21) is arranged on the vehicle chassis connecting mechanism (2); a front shovel bracket (3), wherein the front shovel bracket (3) is connected with the lifting oil cylinder (21) at a position corresponding to the left side of the vehicle chassis connecting mechanism (2), and wheels (31) are respectively arranged at the bottoms of the two ends of the front shovel bracket (3) in the long side direction; a group of front shovels (4), wherein the front shovels (4) are hinged on the front shovel bracket (3) along the left side of the long side direction of the front shovel bracket (3) in a state of being next to each other; the front shovel floating pressure automatic adjusting device comprises a hydraulic control station (5) arranged on a snow remover vehicle body (1), wherein the hydraulic control station (5) is connected with a hydraulic oil way of a lifting oil cylinder (21) and is electrically controlled and connected with a vehicle-mounted controller of the snow remover, and the front shovel floating pressure automatic adjusting device is characterized in that a lifting oil cylinder working pressure sensing sensor (6) for sensing the pressure of the lifting oil cylinder (21) is arranged on a hydraulic oil way of the hydraulic control station (5) connected with the hydraulic oil way of the lifting oil cylinder (21), and the lifting oil cylinder working pressure sensing sensor (6) is electrically connected with the vehicle-mounted controller; the lifting oil cylinder (21) is provided with an upper cylinder cavity (211) and a lower cylinder cavity (212), the upper cylinder cavity (211) and the lower cylinder cavity (212) are separated by an oil cylinder column piston (2131) of an oil cylinder column (213) of the lifting oil cylinder (21), the hydraulic control station (5) comprises an oil tank (51), an oil pump (52), a first reversing valve block (53), a second valve block (54), an overflow valve (55 a), a pressure loading valve (55 b), a first reversing valve (55 c), a second reversing valve (55 d), an electromagnetic valve (55 e), an electromagnetic overflow valve (55 f) and a throttle valve (55 g), the oil tank (51) is arranged on the snow removing vehicle body (1), the oil pump (52) is arranged on the oil tank (51), an oil inlet of the oil pump (52) is communicated with the oil tank (51) through an oil inlet pipe (521), an oil pump of the oil pump (52) is connected with the first reversing valve (55 c) through an oil outlet pipe (522), the overflow valve (55 a), the pressure loading valve (55 b), the first reversing valve (55 c) and the second reversing valve (55 d) are arranged on the oil tank (51) through the oil outlet pipe (522), the pressure loading valve (55 b) is also communicated with the oil tank oil return pipe (511) and the oil pump oil outlet pipe (522), the first reversing valve (55 c) is communicated with the oil pump oil outlet pipe (522) and is communicated with the electromagnetic valve (55 e) through the first pipeline (56 a), the second reversing valve (55 d) is communicated with the oil tank oil return pipe (511) through the second pipeline (56 b), and is also communicated with the upper cylinder cavity (211) of the lifting oil cylinder (21) through the third pipeline (56 c), the electromagnetic valve (55 e), the electromagnetic overflow valve (55 f) and the throttle valve (55 g) are arranged on the second valve block (54), the electromagnetic valve (55 e) is communicated with the throttle valve (55 g) through the fourth pipeline (56 d), the throttle valve (55 g) is communicated with the lower cylinder cavity (212) of the lifting oil cylinder (21) through the fifth pipeline (56 e), the electromagnetic overflow valve (55 f) is communicated with the third pipeline (56 c) and is also communicated with the oil tank oil return pipe (511) through the sixth pipeline (56 f), and the electromagnetic overflow valve (55 f) is also communicated with the oil tank oil return pipe (51) through the sixth pipeline (56 f) and the first valve block (51); the front shovel bracket (3) is connected with the oil cylinder column (213); the lifting oil cylinder working pressure sensing sensor (6) is connected with the third pipeline (56 c) through a pressure sensing sensor oil pipe (61) at a position corresponding to a position between the lifting oil cylinder (21) and the electromagnetic overflow valve (55 f); the third pipeline (56 c) is communicated with an upper cylinder cavity (211) of the lifting oil cylinder (21), and the fifth pipeline (56 e) is communicated with a lower cylinder cavity (212) of the lifting oil cylinder (21).
2. The automatic front shovel float pressure adjusting device for the snow remover according to claim 1 is characterized in that the right sides of the group of front shovels (4) are hinged with the left side of the front shovel bracket (3) through a front shovel upper connecting rod (41) and a front shovel lower connecting rod (42).
3. The automatic front shovel float pressure adjusting device for snow remover according to claim 2, characterized in that a front shovel blade (43) is fixed at the lower part of each of the group of front shovels (4).
4. The front shovel float pressure automatic adjusting device of a snow remover according to claim 1, characterized in that an oil filter (523) is provided at a position corresponding to an oil pump inlet of the oil pump (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035429.4A CN107604872B (en) | 2017-10-30 | 2017-10-30 | Front shovel floating pressure automatic adjusting device of snow remover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035429.4A CN107604872B (en) | 2017-10-30 | 2017-10-30 | Front shovel floating pressure automatic adjusting device of snow remover |
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| CN107604872A CN107604872A (en) | 2018-01-19 |
| CN107604872B true CN107604872B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711035429.4A Active CN107604872B (en) | 2017-10-30 | 2017-10-30 | Front shovel floating pressure automatic adjusting device of snow remover |
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| CN110821824A (en) * | 2019-11-22 | 2020-02-21 | 兰州理工大学 | Internal gear type hydraulic motor pump with integrated cartridge valve at outlet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120062476A (en) * | 2010-12-06 | 2012-06-14 | 한국도로공사 | Device and method for adjusting a grounding pressure of shovel edge of snowplow |
| CN103306233A (en) * | 2013-06-06 | 2013-09-18 | 长安大学 | Automatic compensation control method of snow sweeper roller brush based on pressure feedback |
| CN106988264A (en) * | 2017-04-28 | 2017-07-28 | 常熟华东汽车有限公司 | The drum broom automatic regulating apparatus of snow sweeper |
| CN207419362U (en) * | 2017-10-30 | 2018-05-29 | 常熟华东汽车有限公司 | The front shovel of snow sweeper floats pressure automatic regulating apparatus |
-
2017
- 2017-10-30 CN CN201711035429.4A patent/CN107604872B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120062476A (en) * | 2010-12-06 | 2012-06-14 | 한국도로공사 | Device and method for adjusting a grounding pressure of shovel edge of snowplow |
| CN103306233A (en) * | 2013-06-06 | 2013-09-18 | 长安大学 | Automatic compensation control method of snow sweeper roller brush based on pressure feedback |
| CN106988264A (en) * | 2017-04-28 | 2017-07-28 | 常熟华东汽车有限公司 | The drum broom automatic regulating apparatus of snow sweeper |
| CN207419362U (en) * | 2017-10-30 | 2018-05-29 | 常熟华东汽车有限公司 | The front shovel of snow sweeper floats pressure automatic regulating apparatus |
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