CN212055358U - Wiper ground contact force hydraulic pressure governing system and sweeping machine - Google Patents
Wiper ground contact force hydraulic pressure governing system and sweeping machine Download PDFInfo
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- CN212055358U CN212055358U CN202020754265.1U CN202020754265U CN212055358U CN 212055358 U CN212055358 U CN 212055358U CN 202020754265 U CN202020754265 U CN 202020754265U CN 212055358 U CN212055358 U CN 212055358U
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Abstract
The utility model provides a pair of sweeping ground contact force hydraulic pressure governing system and sweeping machine, the ground contact force is markd before the sweeping machine operation, DT2 and DT3 have got the electricity, sweep set lift cylinder's no pole chamber through two cross solenoid directional valves and tribit cross solenoid directional valve and system pressure oil intercommunication, sweep set descend and the sweeping ground contact that produces touches ground power, two cross solenoid directional valve working port A's pressure value both sums and sweep set gravity form the power balance, two cross solenoid directional valve working port A's pressure value is decided by the overflow pressure of overflow valve. Because the gravity of the sweeping disc is unchanged, the overflow pressure of the overflow valve is adjusted to change the pressure value of the working port A of the two-position four-way electromagnetic reversing valve, and the sweeping ground contact force is correspondingly changed along with the change of the pressure value of the working port A of the two-position four-way electromagnetic reversing valve. The floor-touching force of the sweeper can be adjusted in a self-adaptive mode according to the specific road conditions of the uneven road surface, abrasion of the sweeper is reduced, and the sweeping effect of the sweeper is improved.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure governing system, in particular to wiper ground contact hydraulic pressure governing system and sweeping machine.
Background
With the coming of policies such as blue-sky defense war and beautiful countryside, the environmental protection requirements of cities, towns and villages are continuously improved, more and more roads need to be cleaned and cleaned, the workload is continuously increased, and the manual cleaning operation cost is high and the efficiency is low, so that the mechanized cleaning operation mode represented by road sweeper and washing sweeper is rapidly popularized.
The sweeper is used as the foremost end of the sweeper truck and is responsible for sweeping the road surface garbage to the sucking disc, and then the garbage is sucked to the garbage can by the sucking disc. The sweeping effect of the sweeper brush directly influences the use performance of the whole sweeper truck, meanwhile, the sweeping brush bristles are wearing parts, the service life of the brush bristles has a great influence on the use cost of the whole sweeper truck, and the ground contact force of the sweeper brush directly determines the sweeping effect of the sweeper brush and the service life of the brush bristles.
The ground contact force of the existing sweeping machine is adjusted by limiting the lowering position of an oil cylinder through an adjusting rod on a piston rod of a sweeping disc lifting oil cylinder. The lifting oil cylinder is placed, the sweeper touches the ground, the adjusting lever is fixed on the piston rod in a threaded connection mode, and the lowest position where the oil cylinder is placed is limited by adjusting the position of the adjusting lever on the piston rod, so that different ground contact degrees of the sweeper and the ground, namely different ground contact forces, are achieved.
The existing sweeping ground contact force adjusting mode is manual adjustment and needs to be preset before the sweeping machine runs. Because the ground contact force is mechanically limited in advance, the ground contact force cannot be automatically adjusted along with the unevenness of the road surface in the running process of the sweeping machine, the abrasion of the brush hair is fast, and the sweeping effect on the uneven road surface is poor. On the other hand, after the sweeper is worn for a period of time, the ground contact force of the sweeper needs to be manually calibrated again by a worker.
Therefore, how to enable the sweeping contact force of the sweeping vehicle to have an automatic adjusting function is a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wiper ground contact hydraulic pressure governing system and sweeping machine can carry out the self-adaptation regulation according to the concrete road conditions of road surface unevenness.
In order to solve the technical problem, the utility model provides a wiper grounding force hydraulic pressure adjusting system, which comprises a three-position four-way electromagnetic reversing valve, an overflow valve, a one-way valve, a two-position four-way electromagnetic reversing valve and a wiper lifting oil cylinder; wherein the content of the first and second substances,
an oil inlet of the overflow valve is connected with a working port B of the three-position four-way electromagnetic directional valve, and an oil return port of the overflow valve is connected with a system oil return path;
an oil inlet of the one-way valve is connected with a working port A of the three-position four-way electromagnetic reversing valve, and an oil outlet of the one-way valve is connected with a port P of the two-position four-way electromagnetic reversing valve;
a T port of the two-position four-way electromagnetic directional valve is connected with a working port B of the three-position four-way electromagnetic directional valve, and a working port A of the two-position four-way electromagnetic directional valve is connected with a rodless cavity of the sweeping disc lifting oil cylinder;
and a P port of the three-position four-way electromagnetic reversing valve is communicated with system pressure oil, and a T port of the three-position four-way electromagnetic reversing valve is communicated with a system oil return path.
Preferably, in the above wiper ground contact force hydraulic pressure regulating system, a hydraulic pump is used to supply oil to the system, and the hydraulic pump is a gear pump or a constant pressure pump.
Preferably, in the sweeping and brushing ground pressure hydraulic adjusting system, a working port B of the two-position four-way electromagnetic directional valve is blocked.
Preferably, in the wiper ground contact force hydraulic pressure regulating system, a working port B of the two-position four-way electromagnetic directional valve is communicated with the system oil return path.
The utility model also provides a sweeping machine, include as above the scrubbing ground contact hydraulic pressure governing system.
The utility model provides a pair of wiper ground contact force hydraulic pressure governing system, ground contact force is markd before the sweeping machine operation, DT2 and DT3 on tribit cross solenoid directional valve and the two cross solenoid directional valve get electric, sweep set lift cylinder's no pole chamber through two cross solenoid directional valves and tribit cross solenoid directional valve and system pressure oil intercommunication, sweep set descend and contact the brush ground contact power that produces with ground, two cross solenoid directional valve working port A's pressure value both sums and sweep set gravity formation power balance, two cross solenoid directional valve working port A's pressure value is decided by the overflow pressure of overflow valve. Because the gravity of the sweeping disc is unchanged, the overflow pressure of the overflow valve is adjusted to change the pressure value of the working port A of the two-position four-way electromagnetic reversing valve, and the sweeping ground contact force is correspondingly changed along with the change of the pressure value of the working port A of the two-position four-way electromagnetic reversing valve. Through the design, the floor sweeping force can be adjusted in a self-adaptive mode according to the specific road conditions of the uneven road surface, abrasion of the sweeping brush is reduced, and the sweeping effect of the sweeping brush is improved. The utility model also provides a sweeping machine of having above-mentioned sweeping ground contact hydraulic pressure governing system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a sweeping ground contact force hydraulic adjusting system provided by the scheme.
In the upper diagram:
1-three-position four-way electromagnetic change valve; 2-an overflow valve; 3-a one-way valve; 4-two-position four-way electromagnetic directional valve; and 5, sweeping disc lifting oil cylinders.
Detailed Description
The core of the utility model is to provide a wiper ground contact hydraulic pressure governing system and sweeping machine can carry out the self-adaptation regulation according to the concrete road conditions of road surface unevenness.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the utility model provides a wiper grounding force hydraulic pressure regulating system, which comprises a three-position four-way electromagnetic directional valve 1, an overflow valve 2, a one-way valve 3, a two-position four-way electromagnetic directional valve 4 and a wiper lifting cylinder 5; wherein the content of the first and second substances,
an oil inlet of the overflow valve 2 is connected with a working port B of the three-position four-way electromagnetic directional valve 1, and an oil return port of the overflow valve 2 is connected with a system oil return path;
an oil inlet of the check valve 3 is connected with a working port A of the three-position four-way electromagnetic reversing valve 1, and an oil outlet of the check valve 3 is connected with a port P of the two-position four-way electromagnetic reversing valve 4;
a T port of the two-position four-way electromagnetic directional valve 4 is connected with a working port B of the three-position four-way electromagnetic directional valve 1, a working port A of the two-position four-way electromagnetic directional valve 4 is connected with a rodless cavity of the sweeping disc lifting oil cylinder 5, and the working port B of the two-position four-way electromagnetic directional valve 4 is blocked;
a P port of the three-position four-way electromagnetic directional valve 1 is communicated with system pressure oil, and a T port of the three-position four-way electromagnetic directional valve 1 is communicated with a system oil return path.
It should be noted that the relief valve 2 is used for pressure stabilization adjustment. The one-way valve 3 plays a role of pressure maintaining and locking.
The utility model provides a pair of wiper ground contact force hydraulic pressure governing system, ground contact force is markd before the sweeping machine operation, DT2 and DT3 have electric power, sweep the no pole chamber of set lift cylinder 5 and communicate with system's pressure oil through two four-way electromagnetic directional valve 4 and tribit four-way electromagnetic directional valve 1, sweep the dish and descend to touch ground force with the brush that ground contact produced, two four-way electromagnetic directional valve 4 working port A's pressure value both sums and sweep set gravity formation power balance, two four-way electromagnetic directional valve 4 working port A's pressure value is decided by overflow pressure of overflow valve 2. Because the gravity of the sweeping disc is unchanged, the overflow pressure of the overflow valve 2 is adjusted to change the pressure value of the working port A of the two-position four-way electromagnetic directional valve 4, and the sweeping ground contact force is correspondingly changed along with the change of the pressure value of the working port A of the two-position four-way electromagnetic directional valve 4. Through the design, the floor sweeping force can be adjusted in a self-adaptive mode according to the specific road conditions of the uneven road surface, abrasion of the sweeping brush is reduced, and the sweeping effect of the sweeping brush is improved. After the floor contact force of the sweeper is calibrated in a factory, the floor contact force can be automatically adjusted along with the abrasion of the sweeper, and manual recalibration is not needed.
In a specific embodiment, a hydraulic pump is used to supply oil to the system, and the hydraulic pump is a gear pump or a constant pressure pump. The hydraulic pump adopts a gear pump, and can also select a constant pressure pump to provide power for the sweeping disc lifting oil cylinder 5. The constant pressure pump is compared with the gear pump, and the structure is complicated, and the price is high, preferentially chooses the gear pump for use.
When the sweeping machine works, the DT2 and the DT3 are electrified, a rodless cavity of the sweeping disc lifting oil cylinder 5 is communicated with system pressure oil through the two-position four-way electromagnetic directional valve 4 and the three-position four-way electromagnetic directional valve 1, and the force balance is formed by the sum of sweeping ground contact force generated by the fact that the sweeping disc descends and contacts the ground, the pressure value of a working opening A of the two-position four-way electromagnetic directional valve 4 and the gravity of the sweeping disc. At the moment, the gravity of the sweeping disc and the pressure value of the working opening A of the two-position four-way electromagnetic directional valve 4 are unchanged, when the road surface is convex, the ground contact force of the sweeping brush is increased, the sweeping disc is automatically lifted, the ground contact surface is reduced, and therefore the ground contact force is reduced to a preset balance point. When the road surface is sunken, the sweeping ground contact force is reduced, the sweeping disc automatically lowers, and the contact surface with the ground is increased, so that the ground contact force is increased to a preset balance point.
When the operation of the sweeping machine is finished, the DT1 is electrified, the rodless cavity of the sweeping disc lifting oil cylinder 5 is communicated with system pressure oil through the two-position four-way electromagnetic directional valve 4, the one-way valve 3 and the three-position four-way electromagnetic directional valve 1, the pressure value of the working port A of the two-position four-way electromagnetic directional valve 4 is the pressure of an oil source of a hydraulic system, the pressure value is larger than the gravity of the sweeping disc, the sweeping disc is lifted to the highest point, and the one-way valve 3 plays a pressure maintaining and locking role.
When the sweeping disc is required to be lowered during maintenance of the sweeping machine, DT3 is electrified, a rodless cavity of the sweeping disc lifting oil cylinder 5 is communicated with a system oil return path through the two-position four-way electromagnetic reversing valve 4 and the three-position four-way electromagnetic reversing valve 1, and the sweeping disc is lowered.
In a specific embodiment, as shown in fig. 1, the working port of the two-position four-way electromagnetic directional valve 4 can be selectively blocked. The working port B of the two-position four-way electromagnetic directional valve 4 can be communicated with a system oil return path, and the purpose of the scheme can be realized.
The scheme also provides a sweeping machine which comprises a sweeping brush ground contact force hydraulic adjusting system, wherein the sweeping brush ground contact force hydraulic adjusting system is the sweeping brush ground contact force hydraulic adjusting system disclosed in the embodiment, so that the sweeping machine with the sweeping brush ground contact force hydraulic adjusting system also has all the technical effects, and the details are not repeated.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (5)
1. A wiper grounding force hydraulic adjusting system is characterized by comprising a three-position four-way electromagnetic reversing valve (1), an overflow valve (2), a one-way valve (3), a two-position four-way electromagnetic reversing valve (4) and a wiper lifting oil cylinder (5); wherein the content of the first and second substances,
an oil inlet of the overflow valve (2) is connected with a working port B of the three-position four-way electromagnetic directional valve (1), and an oil return port of the overflow valve (2) is connected with a system oil return path;
an oil inlet of the check valve (3) is connected with a working port A of the three-position four-way electromagnetic reversing valve (1), and an oil outlet of the check valve (3) is connected with a port P of the two-position four-way electromagnetic reversing valve (4);
a T port of the two-position four-way electromagnetic directional valve (4) is connected with a working port B of the three-position four-way electromagnetic directional valve (1), and a working port A of the two-position four-way electromagnetic directional valve (4) is connected with a rodless cavity of the sweeping disc lifting oil cylinder (5);
the P port of the three-position four-way electromagnetic directional valve (1) is communicated with system pressure oil, and the T port of the three-position four-way electromagnetic directional valve (1) is communicated with a system oil return path.
2. A wiper ground pressure hydraulic regulation system according to claim 1 wherein a hydraulic pump is used to supply the system, the hydraulic pump being a gear pump or a constant pressure pump.
3. The wiper ground contact hydraulic pressure regulating system according to claim 1, characterized in that the working port B of the two-position four-way electromagnetic directional valve (4) is blocked.
4. The wiper ground contact hydraulic pressure regulating system according to claim 1, characterized in that a working port B of the two-position four-way electromagnetic directional valve (4) is communicated with the system oil return path.
5. A sweeper truck comprising a sweeper ground contact hydraulic adjustment system as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020754265.1U CN212055358U (en) | 2020-05-09 | 2020-05-09 | Wiper ground contact force hydraulic pressure governing system and sweeping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020754265.1U CN212055358U (en) | 2020-05-09 | 2020-05-09 | Wiper ground contact force hydraulic pressure governing system and sweeping machine |
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| Publication Number | Publication Date |
|---|---|
| CN212055358U true CN212055358U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020754265.1U Active CN212055358U (en) | 2020-05-09 | 2020-05-09 | Wiper ground contact force hydraulic pressure governing system and sweeping machine |
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| CN (1) | CN212055358U (en) |
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2020
- 2020-05-09 CN CN202020754265.1U patent/CN212055358U/en active Active
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