CN107100122B - sweeping disc ground clearance floating type self-adaptive adjusting device and adjusting method thereof - Google Patents
sweeping disc ground clearance floating type self-adaptive adjusting device and adjusting method thereof Download PDFInfo
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- CN107100122B CN107100122B CN201610098330.8A CN201610098330A CN107100122B CN 107100122 B CN107100122 B CN 107100122B CN 201610098330 A CN201610098330 A CN 201610098330A CN 107100122 B CN107100122 B CN 107100122B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/02—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt
- E01H1/05—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes
- E01H1/053—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes having vertical axes
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- Civil Engineering (AREA)
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Abstract
the invention discloses a sweeping disc ground clearance floating type self-adaptive adjusting device and an adjusting method thereof. The self-adaptive adjusting device comprises a sweeping disc, a motor, a floating type oil cylinder, a height self-adaptive adjusting device, a rotating shaft seat, a connecting rod, an adjusting fork, a connecting bracket and a motor seat, the lifting mechanism is a floating type oil cylinder, the piston rod end of the floating type oil cylinder is connected with the connecting rod, and the other end of the floating type oil cylinder is connected with the fixed frame end in a floating manner; the height self-adaptive adjusting device comprises a floating spring, a chain and an electric push rod, one end of the height self-adaptive adjusting device is connected with the end of the fixed frame, and the other end of the height self-adaptive adjusting device is connected to the connecting rod; the adjusting method feeds back the adjusting quantity of the ground clearance of the sweeping disc through scientific detection of the abrasion loss of the sweeping brush or the ground contact pressure of the sweeping brush, controls the telescopic quantity of the adjusting device with the electric push rod through a control system to carry out accurate adjustment and automatic compensation, and is assisted with a floating type oil cylinder to realize the self-adaptive adjustment of the ground clearance of the sweeping disc.
Description
Technical Field
The invention mainly relates to the field of environmental sanitation cleaning equipment, in particular to a sweeping disc ground clearance self-adaptive adjusting device and method for a sweeping car.
Background
at present, in various cleaning devices, the cleaning device is in contact with the road surface through a cleaning disc connected to a frame, and drives garbage along with the rotation of a moving vehicle, and then the suction nozzle sucks the garbage to a garbage can through a fan to realize cleaning operation. Along with the continuous wearing and tearing of sweeper, sweeping disk liftoff is higher and higher, for guaranteeing to clean the effect, just need adjust sweeping disk liftoff clearance. The height adjusting device for the sweeping brush of the existing sweeping machine generally utilizes a manual adjusting chain to adjust the length of the chain and then combines fine adjustment of a screw to adjust the ground clearance of a sweeping disc, so that a large amount of time of operators is consumed, and the height adjusting device is adjusted by one ring at least during adjustment, so that the adjusting range of the adjusting screw is large, the sweeping brush is stressed unevenly, the abrasion is fast, and the service life is short. The self-adaptive structure which is adjusted in a hydraulic mode is also provided, the tension of the lifting oil cylinder, the tension of the tension spring and the force and moment balance of the dead weight of the sweeping disc relative to a hinge point are balanced to realize adjustment through the cooperation of the tension spring and the hydraulic oil cylinder and the constant pressure output of the oil cylinder, but the structure adopting the stress balance principle belongs to rigid connection in a certain meaning, and the self-adaptive adjustment lag and the sweeping disc protection conflict when severe road conditions are met.
Disclosure of Invention
the technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a sweeping disc ground clearance floating type self-adaptive adjusting device and an adjusting method thereof, which can adapt to severe road conditions, and realize the self-adaptive adjustment of the sweeping disc ground clearance through the real-time feedback operation of a control system through the detection of the abrasion of a sweeping brush or the ground contact pressure of the sweeping disc.
in order to solve the technical problems, the technical scheme provided by the invention is as follows:
A floating self-adaptive regulator for the height of sweeping disk from ground,
The self-adaptive adjusting device comprises a sweeping disc, a motor, a lifting mechanism, a height self-adaptive adjusting device, a rotating shaft seat, a connecting rod transmission mechanism and a connecting bracket;
The sweeping disc is connected to the chassis frame through a connecting rod transmission mechanism, and the motor is used as a driving device to drive the sweeping disc to rotate so as to complete sweeping operation;
the connecting rod transmission mechanism comprises a connecting rod, a first end of the connecting rod is connected to a rotating shaft seat fixed on the connecting support, and a second end of the connecting rod is connected with the sweeping disc through the support;
the lifting mechanism is a floating type oil cylinder, the piston rod end of the floating type oil cylinder is connected with the connecting rod, and the other end of the floating type oil cylinder is connected with the fixed frame end in a floating manner;
the height self-adaptive adjusting device comprises a floating spring, a chain and an electric push rod, wherein the floating spring, the chain and the electric push rod are connected, one end of the height self-adaptive adjusting device is connected with the end of the fixed frame, and the other end of the height self-adaptive adjusting device is connected to the connecting rod.
Furthermore, in the connecting rod transmission mechanism, a first end of a connecting rod is connected with the rotating shaft seat through a transverse rotating shaft, and the connecting rod can vertically swing around the transverse rotating shaft to drive the sweeping disc to vertically swing;
The first end of the connecting rod is connected with a vertical long rotating shaft arranged on the rotating shaft seat through a support, and the connecting rod can vertically swing around the vertical long rotating shaft to drive the sweeping disc to swing inside and outside.
the controller feeds back the ground clearance adjustment quantity of the sweeping disc through scientific detection of the abrasion loss of the sweeping brush or the ground contact pressure of the sweeping brush, so that a control system controls the expansion quantity of the height self-adaptive adjusting device with the electric push rod to perform accurate adjustment and automatic compensation, and the self-adaptive adjustment of the ground clearance of the sweeping disc is realized by the aid of a floating type oil cylinder.
Furthermore, the motor is fixed on a motor seat, the sweeping disc is fixed on the motor seat, the second end of the connecting rod is connected with the motor seat through an adjusting bracket, an adjusting bolt is arranged at the joint of the motor seat and the adjusting bracket at the end of the connecting rod, and the camber angle of the sweeping disc is adjusted by the adjusting bolt; the piston end of the floating oil cylinder is hinged on the connecting rod in a spherical mode, and the other end of the floating oil cylinder is connected to the fixed vehicle frame end in a floating mode.
furthermore, the adjusting device also comprises an adjusting fork, wherein the adjusting fork is arranged between the adjusting bracket and the rotating shaft seat, and comprises an adjusting threaded cylinder, a positive thread fork head, a negative thread fork head and a locking nut and is used for adjusting the front inclination angle of the sweeping disc.
furthermore, the controller is connected with a sweeping abrasion loss detection mechanism, the sweeping abrasion loss detection mechanism collects abrasion data of a sweeping disc, the sweeping abrasion loss detection mechanism comprises a signal transmission processing module, a resistance wire, an outer insulation protective sleeve and an insulation spacer, the signal processing module is connected with the resistance wire, the outer insulation protective sleeve and the insulation spacer ensure that the resistance wire is kept in an insulation state, the resistance of the whole resistance wire changes according to different abrasion degrees, the signal processing module sends length data of a sweeping brush to the controller through data processing according to the change of the resistance wire resistance value, the controller is converted into accurate adjustment quantity through a calculation method, and the electric push rod stretches out and draws back to complete real-time adjustment.
Further, the controller includes the following modules:
The first module starts working after receiving the instruction and enters the second module;
the controller receives the current length data of the sweeper and enters a third module;
the third module is used for judging whether the sweeper needs to be replaced according to the data received by the second module, if so, the third module enters the warning module, and the warning module is configured to give a warning after obtaining an instruction and prompt replacement of the sweeper; if the replacement is not needed, the fourth module is entered;
The fourth module is used for judging whether the height of the disc brush from the ground is good or not, if not, the fourth module enters the disc sweeping height adjusting module, and if so, the fifth module is entered;
the sweeping disc height adjusting module is connected with the fourth module again for cyclic judgment after the sweeping disc height is adjusted;
And the fifth module is used for carrying out normal operation and continuously judging the length of the brush.
a sweeping disc ground clearance floating type self-adaptive adjusting method is characterized in that a sweeping disc ground clearance adjusting quantity is fed back through detection of a sweeping brush abrasion quantity or a sweeping brush ground contact pressure, a control system controls the expansion quantity of a height self-adaptive adjusting device with an electric push rod to carry out accurate adjustment and automatic compensation, a floating type oil cylinder structure is used for achieving self-adaptive adjustment of the sweeping disc ground clearance, a controller is connected with the height self-adaptive adjusting device, the height self-adaptive adjusting device comprises a manual adjusting chain, a floating type spring and the electric push rod for achieving real-time accurate adjusting quantity, and a floating type oil cylinder is connected with a sweeping disc through a connecting mechanism.
Furthermore, the abrasion data of the sweeping disc is collected in the detection of the abrasion loss of the sweeping brush, the detection mechanism comprises an outer insulation protective sleeve, an insulation spacer and a resistance wire, the resistance of the whole resistance wire changes according to the difference of abrasion degrees, the length data of the sweeping brush is sent to the controller through certain processing according to the change of the resistance value of the resistance wire, and the controller is accurately adjusted through calculation.
further, the controller includes the following modules:
the first module starts working after receiving the instruction and enters the second module;
the controller receives the current length data of the sweeper and enters a third module;
The third module is used for judging whether the sweeper needs to be replaced according to the data received by the second module, if so, the third module enters the warning module, and the warning module is configured to give a warning after obtaining an instruction and prompt replacement of the sweeper; if the replacement is not needed, the fourth module is entered;
the fourth module is used for judging whether the height of the disc brush from the ground is good or not, if not, the fourth module enters the disc sweeping height adjusting module, and if so, the fifth module is entered;
the sweeping disc height adjusting module is connected with the fourth module again for cyclic judgment after the sweeping disc height is adjusted;
and the fifth module is used for carrying out normal operation and continuously judging the length of the brush.
Compared with the prior art, the invention has the advantages that: through scientific detection, the adjustment quantity of the ground clearance of the sweeping disc is fed back to a control system for accurate adjustment and automatic compensation, and a floating type connecting structure is used for assisting, so that the ground clearance of the sweeping disc is always in a good state, the service life of the sweeping brush is prolonged, and the quality and the efficiency of sweeping operation are improved.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of a sweeping disk floating type adaptive device of the present invention;
FIG. 2 is a structural diagram of a sweeping brush detection wire of one embodiment of the sweeping disk floating type adaptive device of the invention;
fig. 3 is a diagram of the adaptive adjustment method for floating type height of sweeping disc from ground.
The symbols in the figure represent: 1. a rotating shaft seat; 2. connecting a bracket; 3. a height adaptive adjustment device; 4. a floating oil cylinder; 5. an adjusting fork; 6. a connecting rod; 7. adjusting the bolt; 8. a motor; 9. a motor base; 10. and (6) sweeping the disc.
Detailed Description
The invention is further illustrated with reference to the figures and examples.
as shown in figure 1, the floating type self-adaptive adjustment sweeping disc structure comprises a sweeping disc 10, a motor 8, a floating type oil cylinder 4, a height self-adaptive adjustment device 3, a rotating shaft seat 1, a connecting rod 6, an adjustment fork 5, a connecting support 2, a motor seat 9 and the like. The sweeping disc 10 is connected to the chassis frame through a connecting rod transmission mechanism, and the motor 8 is used as a driving device to drive the sweeping disc 10 to rotate so as to complete sweeping operation. The piston end of the floating oil cylinder 4 is hinged on the connecting rod 6 in a spherical mode, and the other end of the floating oil cylinder is connected to the fixed vehicle frame end in a floating mode. The adjusting fork 5 comprises an adjusting thread cylinder, a front screw thread fork head, a back screw thread fork head and a locking nut and is used for adjusting the front rake angle of the sweeping disc. One end of the connecting rod 6 is connected to the rotating shaft seat 1 fixed on the connecting support 2, the other end of the connecting rod is connected with the motor seat 9 through the adjusting support, and the camber angle of the sweeping disc is adjusted by the adjusting bolt 7 at the joint of the motor seat 9 and the connecting rod end support. The height self-adaptive adjusting device 3 is composed of a manual adjusting chain, a floating type spring and an electric push rod, wherein the chain, the floating type spring and the electric push rod can be connected in series, the chain, the floating type spring and the electric push rod are connected end to end, in different embodiments, the connection sequence among the chain, the floating type spring and the electric push rod is variable, one end of the adjusting device is connected with the fixed frame end, and the other end of the adjusting device is connected with the connecting rod 6.
the working principle is as follows: the height of the sweeping disc 10 from the ground is determined by the vertical swinging amount of the connecting rod 6 around the transverse rotating shaft under the comprehensive action of the floating type oil cylinder 4 connected to the connecting rod 6 and the telescopic amount of the height self-adaptive adjusting device 3. After the floating type oil cylinder 4 is completely extended, the floating amount and the height self-adaptive adjusting device 3 form the adjusting amount of the ground clearance of the sweeping disc. After floating balance is realized, the electric push rod adjusts and extends along with the abrasion of the sweeping brush, the abrasion loss is compensated, and the proper ground clearance of the sweeping disc is provided. Be provided with inside and outside stopper on the linking bridge 2, whole connecting rod drive mechanism links to each other with the linking bridge through pivot seat 1, through floating hydro-cylinder 4 and high self-adaptation adjusting device 3 equally, realizes sweeping a set mechanism and carries out inside and outside swing around the long vertical pivot on the pivot seat 1, constitutes multidimension integrated motion from this. In addition, an adjusting fork 5 consisting of an adjusting threaded cylinder, a positive thread fork head, a negative thread fork head and a locking nut is used for adjusting the front inclination angle of the sweeping disc. And the adjusting bolt 7 at the joint of the motor seat and the connecting rod end bracket is used for adjusting the camber angle of the sweeping disc.
as shown in fig. 2, a detection structure of the present invention may be a detection wire structure, and includes a signal transmission processing module 201, a resistance wire 202, an outer insulating protective sleeve 203 and an insulating spacer 204, where the signal processing module 201 is connected to the resistance wire 202, the outer insulating protective sleeve 203 and the insulating spacer 204 ensure that the resistance wire is kept in an insulating state, and the signal processing module 201 feeds back corresponding length data to a controller through different degrees of wear.
The working principle is as follows: the outer insulating protective sleeve 203, the insulating spacer 204 and the resistance wire 201 form a structure as shown in fig. 2, the resistance of the whole resistance wire changes according to different wear degrees, and the signal transmission processing module 201 sends length data of the sweeper brush to the controller through certain processing according to the change of the resistance wire resistance value.
In another preferred embodiment, the sweeping disc is provided with a pressure sensor for judging the height of the sweeping disc from the ground by detecting the pressure of the ground contacting.
in a preferred embodiment, the controller includes the following modules:
the first module starts working after receiving the instruction and enters the second module;
the controller receives the current length data of the sweeper and enters a third module;
The third module is used for judging whether the sweeper needs to be replaced according to the data received by the second module, if so, the third module enters the warning module, and the warning module is configured to give a warning after obtaining an instruction and prompt replacement of the sweeper; if the replacement is not needed, the fourth module is entered;
the fourth module is used for judging whether the height of the disc brush from the ground is good or not, if not, the fourth module enters the disc sweeping height adjusting module, and if so, the fifth module is entered;
The sweeping disc height adjusting module is connected with the fourth module again for cyclic judgment after the sweeping disc height is adjusted;
And the fifth module is used for carrying out normal operation and continuously judging the length of the brush.
as shown in fig. 3, the system of the present invention adjusts the flow chart. When the step 300 starts to work, the controller receives the current length data of the sweeper in the step 301; step 302 is entered to judge whether the sweeper needs to be replaced, if so, step 305 is entered to give a warning and prompt for replacing the sweeper; if not, the step 303 is executed to judge whether the height of the disc brush from the ground is good, otherwise, the step 306 is executed to adjust the height of the sweeping disc and then the circular judgment is executed again. If yes, go to step 304 to perform normal operation and continuously determine the length of the brush.
according to the adjusting method, the adjustment quantity of the ground clearance of the sweeping disc is fed back through scientific detection, the control system is used for carrying out accurate adjustment and automatic compensation, and the floating type connecting structure is used for enabling the ground clearance of the sweeping disc to be in a good state all the time. The method for detecting the abrasion amount of the wiper includes potential sensing, wiper contact pressure calculation conversion, hydraulic feedback, and the like, but the present invention is not limited to the above-described detection method. Within the technical concept of the invention, various detection methods can be adopted to improve the detection precision of the abrasion loss, and the methods belong to the protection scope of the invention.
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present disclosure and not for limiting the same; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent substitutions of parts of the technical features may still be made; without departing from the spirit of the present disclosure, it is intended to cover all such modifications as fall within the scope of the claimed subject matter.
Claims (6)
1. A floating self-adaptive regulator for the height of sweeping disk from ground,
The self-adaptive adjusting device comprises a sweeping disc, a motor, a lifting mechanism, a height self-adaptive adjusting device, a rotating shaft seat, a connecting rod transmission mechanism, a connecting bracket and a controller;
The sweeping disc is connected to the chassis frame through a connecting rod transmission mechanism, and the motor is used as a driving device to drive the sweeping disc to rotate so as to complete sweeping operation;
the connecting rod transmission mechanism comprises a connecting rod, a first end of the connecting rod is connected to a rotating shaft seat fixed on the connecting support, and a second end of the connecting rod is connected with the sweeping disc through the support;
the lifting mechanism is a floating type oil cylinder, the piston rod end of the floating type oil cylinder is connected with the connecting rod, and the other end of the floating type oil cylinder is connected with the fixed frame end in a floating manner;
The height self-adaptive adjusting device comprises a floating spring, a chain and an electric push rod, the floating spring, the chain and the electric push rod are connected, one end of the height self-adaptive adjusting device is connected with the end of the fixed frame, and the other end of the height self-adaptive adjusting device is connected to the connecting rod;
the controller feeds back the ground clearance adjustment quantity of the sweeping disc through scientific detection of the abrasion loss of the sweeping brush, so that a control system controls the expansion quantity of the height self-adaptive adjusting device with the electric push rod to carry out accurate adjustment and automatic compensation, and the self-adaptive adjustment of the ground clearance of the sweeping disc is realized by assisting a floating type oil cylinder;
the controller is connected with a sweeper abrasion loss detection mechanism, the sweeper abrasion loss detection mechanism collects abrasion data of a sweeping disc, the sweeper abrasion loss detection mechanism comprises a signal transmission processing module, a resistance wire, an outer insulation protective sleeve and an insulation spacer, the signal processing module is connected with the resistance wire, the outer insulation protective sleeve and the insulation spacer ensure that the resistance wire is kept in an insulation state, resistance of the whole resistance wire changes according to different abrasion degrees, the signal processing module sends length data of a sweeper to the controller according to the change of the resistance wire resistance value through data processing, the controller is converted into accurate adjustment amount through a calculation method, and real-time adjustment is completed by the stretching of an electric push rod.
2. A floating self-adaptive adjusting device for the height of sweeping disc from ground according to claim 1,
In the connecting rod transmission mechanism, a first end of a connecting rod is connected with a rotating shaft seat through a transverse rotating shaft, and the connecting rod can vertically swing around the transverse rotating shaft to drive the sweeping disc to vertically swing;
the first end of the connecting rod is connected with a vertical long rotating shaft arranged on the rotating shaft seat through a support, and the connecting rod can vertically swing around the vertical long rotating shaft to drive the sweeping disc to swing inside and outside.
3. The floating self-adaptive adjusting device for the height of the sweeping disk above the ground as claimed in claim 1, wherein the motor is fixed on the motor base, the sweeping disk is fixed on the motor base, the second end of the connecting rod is connected with the motor base through an adjusting bracket, an adjusting bolt is arranged at the connection position of the motor base and the adjusting bracket at the end of the connecting rod, and the camber angle of the sweeping disk is adjusted by the adjusting bolt; the piston end of the floating oil cylinder is hinged on the connecting rod in a spherical mode, and the other end of the floating oil cylinder is connected to the fixed vehicle frame end in a floating mode.
4. The floating self-adaptive adjusting device for the floor clearance of the sweeping disk according to any one of claims 1 to 3, further comprising an adjusting fork, wherein the adjusting fork is arranged between the adjusting bracket and the rotating shaft seat, and the adjusting fork comprises an adjusting threaded barrel, a positive thread fork head, a negative thread fork head and a locking nut and is used for adjusting the front inclination angle of the sweeping disk.
5. The floating type adaptive adjustment device for the floor clearance height of the sweeping disc of claim 1, wherein the controller comprises the following modules:
the first module starts working after receiving the instruction and enters the second module;
The controller receives the current length data of the sweeper and enters a third module;
The third module is used for judging whether the sweeper needs to be replaced according to the data received by the second module, if so, the third module enters the warning module, and the warning module is configured to give a warning after obtaining an instruction and prompt replacement of the sweeper; if the replacement is not needed, the fourth module is entered;
the fourth module is used for judging whether the height of the disc brush from the ground is good or not, if not, the fourth module enters the disc sweeping height adjusting module, and if so, the fifth module is entered;
the sweeping disc height adjusting module is connected with the fourth module again for cyclic judgment after the sweeping disc height is adjusted;
and the fifth module is used for carrying out normal operation and continuously judging the length of the brush.
6. a method for floating self-adaptive adjustment of the ground clearance of a sweeping disc is characterized in that the adjustment quantity of the ground clearance of the sweeping disc is fed back through the detection of the abrasion loss of a sweeping brush, a control system is used for controlling the expansion quantity of a height self-adaptive adjusting device with an electric push rod to carry out accurate adjustment and automatic compensation, a floating type oil cylinder structure is used for realizing the self-adaptive adjustment of the ground clearance of the sweeping disc, a controller is adopted to be connected with the height self-adaptive adjusting device, the height self-adaptive adjusting device comprises a manual adjusting chain, a floating type spring and an electric push rod for realizing real-time accurate adjustment quantity, and a floating type oil cylinder is connected with the sweeping;
the detection of the abrasion loss of the sweeper is realized by collecting abrasion data of the sweeper disc, the detection mechanism comprises an outer insulation protective sleeve, an insulation spacer and a resistance wire, the resistance of the whole resistance wire changes according to the difference of abrasion degrees, the resistance of the resistance wire changes according to the resistance value of the resistance wire, the length data of the sweeper is sent to the controller after certain processing, and the controller is used for accurately adjusting through calculation;
The controller comprises the following modules:
the first module starts working after receiving the instruction and enters the second module;
the controller receives the current length data of the sweeper and enters a third module;
the third module is used for judging whether the sweeper needs to be replaced according to the data received by the second module, if so, the third module enters the warning module, and the warning module is configured to give a warning after obtaining an instruction and prompt replacement of the sweeper; if the replacement is not needed, the fourth module is entered;
The fourth module is used for judging whether the height of the disc brush from the ground is good or not, if not, the fourth module enters the disc sweeping height adjusting module, and if so, the fifth module is entered;
the sweeping disc height adjusting module is connected with the fourth module again for cyclic judgment after the sweeping disc height is adjusted;
and the fifth module is used for carrying out normal operation and continuously judging the length of the brush.
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| CN201610098330.8A CN107100122B (en) | 2016-02-23 | 2016-02-23 | sweeping disc ground clearance floating type self-adaptive adjusting device and adjusting method thereof |
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| CN201610098330.8A CN107100122B (en) | 2016-02-23 | 2016-02-23 | sweeping disc ground clearance floating type self-adaptive adjusting device and adjusting method thereof |
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| CN107100122A CN107100122A (en) | 2017-08-29 |
| CN107100122B true CN107100122B (en) | 2019-12-17 |
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| CN204340984U (en) * | 2014-12-09 | 2015-05-20 | 杨谢丛尤 | A kind of engineering truck cleaning apparatus |
| CN104452636A (en) * | 2014-12-26 | 2015-03-25 | 徐州徐工随车起重机有限公司 | Sweeping disc height adjusting mechanism, sweeping device and sweeping truck |
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| CN107100122A (en) | 2017-08-29 |
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