Road sweeper, sweeping brush assembly, sweeping brush floating hydraulic system and control method thereof

Abstract

The present invention discloses a road sweeper, a sweeping brush assembly, a sweeping brush floating hydraulic system and a control method thereof, wherein the sweeping brush floating hydraulic system comprises a sweeping brush supporting oil cylinder, a pressure reducing valve, a first electromagnetic on-off valve, a second electromagnetic on-off valve, an oil pump and an oil tank, wherein one of a rod cavity and a rodless cavity of the sweeping brush supporting oil cylinder is connected to the oil tank, and the other of the rod cavity and the rodless cavity of the sweeping brush supporting oil cylinder is connected to the oil pump through a first oil circuit branch and a second oil circuit branch connected in parallel, the first oil circuit branch is provided with a first electromagnetic on-off valve, and the second oil circuit branch is connected in series with a pressure reducing valve and a second electromagnetic on-off valve; the above-mentioned hydraulic system enables the sweeping brush to automatically adjust the operating height according to the unevenness of the road surface and the wear of the sweeping brush, without manual adjustment, thus reducing the workload of the user, and will not aggravate the wear of the sweeping brush due to the unevenness of the road surface, thereby improving the cleaning effect on uneven roads, extending the service life of the sweeping brush, and being able to adjust the interaction force between the ground and the sweeping brush to achieve the adjustment of the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of sanitation equipment, and in particular to a road sweeper, a sweeping brush assembly, a sweeping brush floating hydraulic system and a control method thereof. Background Art

[0002] The sweeping brush is the front end of the road sweeper, responsible for sweeping the garbage on the road to the suction cup, which then sucks the garbage into the trash bin. The sweeping effect of the sweeping brush directly affects the performance of the road sweeper. At the same time, the bristles of the sweeping brush are consumable parts, and the service life of the bristles has a significant impact on the use cost of the road sweeper. The operating height of the sweeping disc directly determines the contact degree between the sweeping brush and the ground, the sweeping effect of the sweeping brush and the service life of the bristles.

[0003] The sweeping disc structure of the existing road sweeper is as follows: Figure 1 As shown, the sweeping disc structure includes a sweeping disc 01, a connecting rod 02, a cylinder 03 and a limit adjustment screw sleeve 04. One end of the connecting rod 02 and one end of the cylinder 03 are rotatably connected to the body of the road sweeper respectively, the other end of the connecting rod 02 is connected to the sweeping disc 01, and the other end of the cylinder 03 is rotatably connected to the connecting rod 02. The limit adjustment screw sleeve 04 is threadedly matched with the piston rod of the cylinder 03. In combination with the accompanying drawings, it can be seen that when the piston rod of the cylinder 03 is extended, the connecting rod 02 drives the sweeping disc 01 to move upward, and when the piston rod of the cylinder 03 is retracted, the connecting rod 02 drives the sweeping disc 01 to be lowered. By adjusting the position of the limit adjustment screw sleeve 04 on the piston rod of the cylinder 03, the retraction amount of the piston rod of the cylinder 03 can be controlled, thereby achieving different sweeping disc operating heights. This sweeping disc operating height adjustment method is manual adjustment, and needs to be pre-adjusted before the road sweeper is operated. Since the operating height of the sweeping disc is mechanically pre-defined, the operating height of the sweeping disc cannot be automatically adjusted according to the unevenness of the road surface during the operation of the road sweeper, the bristles wear out quickly, and the cleaning effect on uneven roads is poor. On the other hand, after the sweeping brush is worn out after a period of work, in order to ensure the cleaning effect, the operating height of the sweeping disc needs to be manually calibrated again by the staff, which increases the user's workload. Summary of the invention

[0004] In view of this, the first purpose of the present invention is to provide a sweeping brush floating hydraulic system so that the sweeping brush operating height can change automatically with the unevenness of the road surface and its own wear, thereby reducing unnecessary wear caused by the uneven road surface, improving the cleaning effect on uneven roads, and avoiding subsequent manual calibration to increase user workload.

[0005] The second object of the present invention is to provide a sweeping and brushing operation height control method, a sweeping and brushing assembly and a road sweeper based on the above-mentioned sweeping and brushing floating hydraulic system.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A sweep brush floating hydraulic system includes a sweep brush support cylinder, a pressure reducing valve, a first electromagnetic on-off valve, a second electromagnetic on-off valve, an oil pump and an oil tank, wherein one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil pump via a first oil circuit branch and a second oil circuit branch connected in parallel, wherein the first oil circuit branch is provided with the first electromagnetic on-off valve, and the second oil circuit branch is connected in series with the pressure reducing valve and the second electromagnetic on-off valve.

[0008] Preferably, it also includes a three-position four-way solenoid valve, the oil inlet of the three-position four-way solenoid valve is connected to the oil pump, the oil return port of the three-position four-way solenoid valve is connected to the oil tank, one working oil port of the three-position four-way solenoid valve is connected to one end of the two oil branches away from the sweeping brush support cylinder, and one of the rod chamber and rodless chamber of the sweeping brush support cylinder that is not connected to the two oil branches is connected to another working oil port of the three-position four-way solenoid valve.

[0009] Preferably, the first electromagnetic on-off valve and the second electromagnetic on-off valve are both electromagnetic ball valves.

[0010] A method for controlling the height of a sweeping operation based on the above-mentioned sweeping floating hydraulic system comprises the following steps:

[0011] Get user instructions;

[0012] If the instruction is a road sweeping operation instruction, the left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT4 of the second solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump through the second oil circuit branch and the three-position four-way solenoid valve, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank, and the sweep brush support cylinder is actuated to move the sweep brush to the preset operation position;

[0013] If the instruction is an instruction to end the operation, the left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT3 of the first solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank, and the sweep brush support cylinder is actuated to lift the sweep brush to the highest position;

[0014] If the instruction is a maintenance instruction, the right-position electromagnet DT2 of the three-position four-way solenoid valve and the electromagnet DT3 of the first solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump, and the movement of the sweep brush support cylinder drives the sweep brush to be lowered.

[0015] Preferably, the method further comprises a calibration step:

[0016] Get traffic information;

[0017] The left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT4 of the second solenoid on-off valve are controlled to be energized, and one of the rod chamber and the rodless chamber of the sweep brush support oil cylinder is connected to the output end of the oil pump through the second oil circuit branch and the three-position four-way solenoid valve, and the other of the rod chamber and the rodless chamber of the sweep brush support oil cylinder is connected to the oil tank through the three-position four-way solenoid valve;

[0018] The outlet pressure of the pressure reducing valve is adjusted multiple times, and after each adjustment, the sweeping brush is controlled to clean the road condition at that location, and the position of the sweeping brush with the best cleaning effect is selected as the working position consistent with the acquired road condition information, and the working position is used as the preset working position corresponding to the road condition information.

[0019] A sweeping brush assembly, comprising:

[0020] A connecting rod, wherein the first end of the connecting rod is rotatably disposed on the body of the road sweeper relative to the body of the road sweeper;

[0021] a sweeping brush disposed at the second end of the connecting rod;

[0022] A sweeping brush floating hydraulic system as described in any of the above items, wherein one of the cylinder body and the piston rod of the sweeping brush supporting cylinder of the sweeping brush floating hydraulic system is rotatably arranged on the body of the sweeping vehicle relative to the body of the sweeping vehicle, and the other of the cylinder body and the piston rod of the sweeping brush supporting cylinder is rotatably connected to the connecting rod, and the connecting rod swings up and down with the extension and retraction of the sweeping brush supporting cylinder to drive the sweeping brush to rise and fall.

[0023] Preferably, it also includes an adjusting rod, the length of which is adjustable and the first end of the adjusting rod is used to be rotatably arranged on the body of the road sweeper relative to the body of the road sweeper, the second end of the adjusting rod and the second end of the connecting rod are respectively rotatably connected to the sweeping brush, and the sweeping brush rotates relative to the connecting rod as the adjusting rod is extended or retracted.

[0024] Preferably, it also includes a mounting component for setting the sweeping brush assembly on the body of the road sweeper, and the cylinder body and one of the piston rods of the sweeping brush supporting cylinder, the first end of the adjusting rod and the first end of the connecting rod are rotatably connected to the mounting component respectively.

[0025] Preferably, the mounting component includes a fixed frame, a rotating frame and a driving device, the rotating frame is rotatably disposed on the fixed frame, the fixed frame is used to be disposed on a body of a road sweeper, the cylinder body of the sweeping brush supporting cylinder and one of the piston rods, the first end of the adjusting rod and the first end of the connecting rod are rotatably connected to the rotating frame respectively, the rotation axis of the rotating frame relative to the fixed frame is perpendicular to the rotation axis of the connecting rod relative to the rotating frame, the driving device is disposed on the fixed frame or the body of the road sweeper, and the output end of the driving device is connected to the rotating frame to drive the rotating frame to rotate relative to the fixed frame.

[0026] A road sweeper comprises the sweeping brush assembly as described in any one of the above items.

[0027] To achieve the above-mentioned purpose, the present invention provides a sweep brush floating hydraulic system, which comprises a sweep brush supporting oil cylinder, a pressure reducing valve, a first electromagnetic on-off valve, a second electromagnetic on-off valve, an oil pump and an oil tank, wherein one of the rod chamber and the rodless chamber of the sweep brush supporting oil cylinder is connected to the oil tank, and the other of the rod chamber and the rodless chamber of the sweep brush supporting oil cylinder is connected to the oil pump through a first oil circuit branch and a second oil circuit branch connected in parallel, wherein the first oil circuit branch is provided with a first electromagnetic on-off valve, and the second oil circuit branch is connected in series with a pressure reducing valve and a second electromagnetic on-off valve, and the pressure reducing valve is used to adjust the oil pressure output to the rod chamber or the rodless chamber of the sweep brush supporting oil cylinder, and at the same time, only one of the first electromagnetic on-off valve and the second electromagnetic on-off valve is electrically connected; according to the relative positions of the sweep brush supporting oil cylinder and the sweep brush, the sweep brush can rise with the extension of the sweep brush supporting oil cylinder and fall with the retraction of the sweep brush supporting oil cylinder, and the sweep brush can also fall with the extension of the sweep brush supporting oil cylinder and rise with the extension of the sweep brush supporting oil cylinder;

[0028] When in use, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank. When the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil pump through the first oil circuit branch, the sweep brush support cylinder is fully extended or fully retracted, and the sweep brush rises to the highest point or drops to the lowest point. When the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil pump through the second oil circuit branch, since the outlet pressure of the pressure reducing valve is basically constant, the sum of the supporting force applied by the sweep brush support cylinder to the sweep brush and the supporting force of the ground on the sweep brush can be balanced with the weight of the sweep brush by adjusting the outlet pressure of the pressure reducing valve. When a depression occurs on the ground When the convexity of the road surface changes or the sweeping brush wears, the supporting force of the ground on the sweeping brush also changes accordingly, while the weight of the sweeping brush and the supporting force applied to the sweeping brush by the sweeping brush supporting cylinder remain unchanged, and the above balance is broken, so that the sweeping brush can automatically adjust its operating height according to the changes in the convexity of the road surface and the wear of the sweeping brush. No manual adjustment is required, which reduces the user's workload and does not aggravate the wear of the sweeping brush due to the convexity of the road surface. While improving the cleaning effect on uneven roads, it extends the service life of the sweeping brush. In addition, by adjusting the outlet pressure of the pressure reducing valve, the interaction force between the ground and the sweeping brush can be adjusted, thereby achieving the adjustment of the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a sweeping brush assembly in the prior art;

[0031] Figure 2 A schematic diagram of the structure of a sweeping brush floating hydraulic system provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of a sweeping brush assembly provided in an embodiment of the present invention.

[0033] Figure 1 middle:

[0034] 01 is the sweeping brush; 02 is the connecting rod; 03 is the oil cylinder; 04 is the limit adjustment screw sleeve;

[0035] Figure 2 and Figure 3 middle:

[0036] 1 is a sweep brush supporting cylinder; 2 is a first electromagnetic on-off valve; 3 is a second electromagnetic on-off valve; 4 is a pressure reducing valve; 5 is a three-position four-way electromagnetic valve; 6 is a sweep brush; 7 is a connecting rod; 8 is a mounting component; and 9 is an adjusting rod. DETAILED DESCRIPTION

[0037] One of the core elements of the present invention is to provide a sweeping brush floating hydraulic system. The structural design of the sweeping brush floating hydraulic system enables the sweeping brush operating height to change automatically with the unevenness of the road surface and its own wear, thereby reducing unnecessary wear caused by the unevenness of the road surface, improving the cleaning effect on uneven roads, and avoiding subsequent manual calibration to increase user workload.

[0038] Another core of the present invention is to provide a sweeping and brushing operation height control method, a sweeping and brushing assembly and a road sweeper based on the above-mentioned sweeping and brushing floating hydraulic system.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 2 , Figure 2 A schematic diagram of the structure of a sweeping brush floating hydraulic system provided in an embodiment of the present invention.

[0041] An embodiment of the present invention provides a sweep brush floating hydraulic system, which includes a sweep brush supporting oil cylinder 1, a pressure reducing valve 4, a first electromagnetic on-off valve 2, a second electromagnetic on-off valve 3, an oil pump and an oil tank.

[0042] Among them, one of the rod chamber and the rodless chamber of the sweeping brush supporting cylinder 1 is connected to the oil tank, and the other of the rod chamber and the rodless chamber of the sweeping brush supporting cylinder 1 is connected to the oil pump through the first oil circuit branch and the second oil circuit branch in parallel, wherein the first oil circuit branch is provided with a first electromagnetic on-off valve 2, and the second oil circuit branch is connected in series with a pressure reducing valve 4 and a second electromagnetic on-off valve 3, and the pressure reducing valve 4 is used to adjust the oil pressure output to the rod chamber or the rodless chamber of the sweeping brush supporting cylinder 1. At the same time, only one of the first electromagnetic on-off valve 2 and the second electromagnetic on-off valve 3 is electrically connected; according to the relative positions of the sweeping brush supporting cylinder 1 and the sweeping brush 6, the sweeping brush 6 can rise with the extension of the sweeping brush supporting cylinder 1 and fall with the retraction of the sweeping brush supporting cylinder 1, and the sweeping brush 6 can also fall with the extension of the sweeping brush supporting cylinder 1 and rise with the extension of the sweeping brush supporting cylinder 1.

[0043] exist Figure 2In the specific embodiment shown, the rodless chamber of the sweep brush support cylinder 1 is connected to the oil pump through the first oil circuit branch and the second oil circuit branch connected in parallel, and the rod chamber of the sweep brush support cylinder 1 is connected to the oil tank.

[0044] When in use, one of the rod chamber and the rodless chamber of the sweep brush support oil cylinder 1 is connected to the oil tank. When the other of the rod chamber and the rodless chamber of the sweep brush support oil cylinder 1 is connected to the oil pump through the first oil circuit branch, the sweep brush support oil cylinder 1 is fully extended or fully retracted, and the sweep brush 6 is raised to the highest point or lowered to the lowest point. When the other of the rod chamber and the rodless chamber of the sweep brush support oil cylinder 1 is connected to the oil pump through the second oil circuit branch, since the outlet pressure of the pressure reducing valve 4 is basically constant, the sweep brush support oil cylinder 1 can adjust the outlet pressure of the pressure reducing valve 4 to make the sweep brush 6 The sum of the supporting force applied by the ground and the supporting force of the sweeping brush 6 by the ground is balanced with the weight of the sweeping brush 6. When the ground is concave or the sweeping brush 6 is worn, the supporting force of the ground on the sweeping brush 6 decreases, while the weight of the sweeping brush 6 and the supporting force applied by the sweeping brush supporting cylinder 1 to the sweeping brush 6 remain unchanged, and the original balance is broken. Therefore, the sweeping brush 6 will lower itself until the supporting force of the ground on the sweeping brush 6 returns to the original level and forms a balance again; when the ground is convex, the supporting force of the ground on the sweeping brush 6 increases, while the weight of the sweeping brush 6 and the supporting force applied by the sweeping brush supporting cylinder 1 to the sweeping brush 6 remain unchanged, and the sweeping brush 6 is The brush 6 breaks the original balance and moves upward under the action of the ground support force until the support force of the ground on the sweeping brush 6 is reduced to the balance among the weight of the sweeping brush 6, the support force applied by the sweeping brush support cylinder 1 on the sweeping brush 6 and the support force of the ground on the sweeping brush 6. It can be seen that when the ground becomes uneven or the sweeping brush 6 is worn, the support force of the ground on the sweeping brush 6 also changes accordingly, while the weight of the sweeping brush 6 and the support force applied by the sweeping brush support cylinder 1 on the sweeping brush 6 remain unchanged. And the supporting force of the ground on the sweeping brush 6 moves in a direction in which a balance is formed again, so that the sweeping brush 6 can adjust its working height automatically according to the unevenness of the road surface and the wear of the sweeping brush 6. There is no need for manual adjustment, which reduces the workload of users and does not aggravate the wear of the sweeping brush 6 due to the unevenness of the road surface. While improving the cleaning effect on uneven roads, the service life of the sweeping brush 6 is extended, and by adjusting the outlet pressure of the pressure reducing valve 4, the interaction force between the ground and the sweeping brush 6 can be adjusted, thereby achieving the adjustment of the cleaning effect.

[0045] As preferably, Figure 2 As shown, the sweeping brush floating hydraulic system also includes a three-position four-way solenoid valve 5, the oil inlet of the three-position four-way solenoid valve 5 is connected to the oil pump, the oil return port of the three-position four-way solenoid valve 5 is connected to the oil tank, one working oil port of the three-position four-way solenoid valve 5 is connected to one end of the two oil circuit branches away from the sweeping brush support cylinder 1, and one of the rod chamber and the rodless chamber of the sweeping brush support cylinder 1 that is not connected to the two oil circuit branches is connected to another working oil port of the three-position four-way solenoid valve 5.

[0046] Specifically, Figure 2 For example, the working oil port A of the three-position four-way solenoid valve 5 is connected to the rodless chamber of the sweep brush support cylinder 1 through the first oil circuit branch and the second oil circuit branch connected in parallel, and the working oil port B of the three-position four-way solenoid valve 5 is connected to the rod chamber of the sweep brush support cylinder 1. When the left electromagnet DT1 of the three-position four-way solenoid valve 5 and the electromagnet DT4 of the second electromagnetic on-off valve 3 are energized, the oil pump is connected to the rodless chamber of the sweep brush support cylinder 1 through the oil inlet P of the three-position four-way solenoid valve 5, the working oil port A of the three-position four-way solenoid valve 5 and the second oil circuit branch. The rod chamber of the solenoid valve 5 is connected with the oil tank. At this time, according to the output pressure of the pressure reducing valve 4 on the second oil branch, the piston rod of the sweep brush support cylinder 1 is extended to the preset working position. At this time, cleaning operation can be carried out. When the left electromagnet DT1 of the three-position four-way solenoid valve 5 and the electromagnet DT3 of the first electromagnetic on-off valve 2 are energized, the oil pump is connected with the rodless chamber of the sweep brush support cylinder 1 through the first oil branch, and the rod chamber of the three-position four-way solenoid valve 5 is connected with the oil tank. The piston rod of the sweep brush support cylinder 1 is fully extended. At this time, the sweep brush 6 is at the highest point or the lowest point.

[0047] Preferably, in the above embodiment, the first electromagnetic on-off valve 2 and the second electromagnetic on-off valve 3 are both electromagnetic ball valves, and of course they may also be other electromagnetic valves with on-off functions.

[0048] Based on the above-mentioned sweeping brush floating hydraulic system, an embodiment of the present invention further provides a sweeping brush operation height control method, the control method comprising the steps of:

[0049] S01: Get user instructions;

[0050] The user command here can be a remote control command, a keyboard input command, a voice command, etc.

[0051] S02: If the instruction is a road sweeping operation instruction, the left electromagnet DT1 of the three-position four-way solenoid valve 5 and the electromagnet DT4 of the second solenoid on-off valve 3 are controlled to be energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil pump output end through the second oil circuit branch and the three-position four-way solenoid valve 5, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil tank, and the sweep brush support cylinder 1 is actuated to move the sweep brush 6 to a preset operation position, which is a position where the outlet pressure of the pressure reducing valve 4 is adjusted according to the road condition so that the interaction force between the sweep brush 6 and the ground meets the road condition requirements;

[0052] If the instruction is to end the operation instruction, the left electromagnet DT1 of the three-position four-way solenoid valve 5 and the electromagnet DT3 of the first solenoid on-off valve 2 are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the output end of the oil pump through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil tank, and the sweep brush support cylinder 1 is actuated to lift the sweep brush 6 to the highest position;

[0053] If the instruction is a maintenance instruction, the right-position electromagnet DT2 of the three-position four-way solenoid valve 5 and the electromagnet DT3 of the first solenoid on-off valve 2 are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil tank through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the output end of the oil pump. The movement of the sweep brush support cylinder 1 drives the sweep brush 6 to be lowered for the convenience of user maintenance.

[0054] Furthermore, before the above steps, the control method further includes a calibration step:

[0055] S11: Obtaining road condition information;

[0056] Obtain road condition information and input it into the system. The road condition information includes asphalt pavement, cement pavement, and masonry pavement. After calibration, a comparison table of road condition information and the outlet pressure of the pressure reducing valve 4 is formed in the system. When the user performs subsequent operations, the system can retrieve the corresponding outlet pressure of the pressure reducing valve 4 from the comparison table according to the road condition information input by the user and adjust the pressure reducing valve 4.

[0057] S12: Control the left electromagnet DT1 of the three-position four-way solenoid valve 5 and the electromagnet DT4 of the second solenoid on-off valve 3 to be energized, and one of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the output end of the oil pump through the second oil circuit branch and the three-position four-way solenoid valve 5, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil tank through the three-position four-way solenoid valve 5;

[0058] like Figure 2 As shown, the oil pump is connected to one of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 through the oil inlet P of the three-position four-way solenoid valve 5, the working oil port A and the second oil circuit branch. The other of the rod chamber and the rodless chamber of the sweep brush support cylinder 1 is connected to the oil tank. At this time, the oil pressure output by the oil pump is adjusted by the pressure reducing valve 4 and then input into the rod chamber or the rodless chamber of the sweep brush support cylinder 1.

[0059] S13: The outlet pressure of the pressure reducing valve 4 is adjusted multiple times, and after each adjustment, the sweeping brush 6 is controlled to clean the road condition at that location, and the position of the sweeping brush 6 with the best cleaning effect is selected as the working position consistent with the acquired road condition information, and the working position is used as the preset working position corresponding to the road condition information.

[0060] See also Figure 3 The embodiment of the present invention further provides a sweeping brush assembly, which includes a connecting rod 7, a sweeping brush 6 and a sweeping brush floating hydraulic system as described in the above embodiment, wherein the first end of the connecting rod 7 is used to be rotatably arranged on the body of the road sweeper relative to the body of the road sweeper; the sweeping brush 6 is arranged at the second end of the connecting rod 7; one of the cylinder body and the piston rod of the sweeping brush supporting cylinder 1 of the sweeping brush floating hydraulic system is used to be rotatably arranged on the body of the road sweeper relative to the body of the road sweeper, and the other of the cylinder body and the piston rod of the sweeping brush supporting cylinder 1 is rotatably connected to the connecting rod 7, and the connecting rod 7 swings up and down with the extension and retraction of the sweeping brush supporting cylinder 1 to drive the sweeping brush 6 to rise and fall.

[0061] The above-mentioned sweep brush support cylinder 1 can be arranged on the upper side or the lower side of the connecting rod 7. When the sweep brush support cylinder 1 is arranged on the upper side of the connecting rod 7, when the piston rod of the sweep brush support cylinder 1 is extended, the connecting rod 7 drives the sweep brush 6 to move downward, and when the piston rod of the sweep brush support cylinder 1 is retracted, the connecting rod 7 drives the sweep brush 6 to move upward; when the sweep brush support cylinder 1 is arranged on the lower side of the connecting rod 7, as shown in FIG. Figure 3 As shown, when the piston rod of the sweep brush supporting oil cylinder 1 is extended, the connecting rod 7 drives the sweep brush 6 to move upward, and when the piston rod of the sweep brush supporting oil cylinder 1 is retracted, the connecting rod 7 drives the sweep brush 6 to move downward.

[0062] Further optimize the above technical solution, such as Figure 3 As shown, the above-mentioned sweeping brush assembly also includes an adjusting rod 9, the length of which is adjustable and the first end of the adjusting rod 9 is used to be rotatably arranged on the body of the sweeping vehicle relative to the body of the sweeping vehicle, the second end of the adjusting rod 9 and the second end of the connecting rod 7 are respectively rotatably connected to the sweeping brush 6, the sweeping brush 6 rotates relative to the connecting rod 7 as the adjusting rod 9 is extended or retracted, and the sweeping brush 6 rotates relative to the connecting rod 7 as the adjusting rod 9 is extended or retracted, so that when the adjusting rod 9 is extended or retracted, the sweeping disc rotates relative to the connecting rod 7, which can change the contact area and contact position of the sweeping brush 6 with the ground.

[0063] As preferably, Figure 3 The sweeping brush assembly also includes a mounting component 8 for setting the sweeping brush assembly on the body of the road sweeper. The cylinder body and one of the piston rods of the sweeping brush supporting cylinder 1, the first end of the adjusting rod 9 and the first end of the connecting rod 7 are rotatably connected to the mounting component 8 respectively.

[0064] Furthermore, the above-mentioned mounting component 8 includes a fixed frame, a rotating frame and a driving device. The rotating frame is rotatably arranged on the fixed frame, and the fixed frame is used to be arranged on the body of the road sweeper. The cylinder body of the sweeping brush supporting cylinder 1 and one of the piston rods, the first end of the adjusting rod 9 and the first end of the connecting rod 7 are rotatably connected to the rotating frame respectively. The rotation axis of the rotating frame relative to the fixed frame is perpendicular to the rotation axis of the connecting rod 7 relative to the rotating frame. The driving device is arranged on the fixed frame or the body of the road sweeper, and the output end of the driving device is connected to the rotating frame to drive the rotating frame to rotate relative to the fixed frame, so that the sweeping brush 6 can swing along the front and rear direction of the body.

[0065] An embodiment of the present invention further provides a road sweeper, which includes the sweeping brush assembly described in the above embodiment. Since the road sweeper adopts the sweeping brush assembly in the above embodiment, the technical effect of the road sweeper please refer to the above embodiment.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sweeping brush floating hydraulic system, characterized in that: It includes a sweeping brush support cylinder, a pressure reducing valve, a first electromagnetic on-off valve, a second electromagnetic on-off valve, a three-position four-way electromagnetic valve, an oil pump and an oil tank, one of the rod chamber and the rodless chamber of the sweeping brush support cylinder is connected to the oil tank, and the other of the rod chamber and the rodless chamber of the sweeping brush support cylinder is connected to the oil pump through a first oil circuit branch and a second oil circuit branch connected in parallel, wherein the first oil circuit branch is provided with the first electromagnetic on-off valve, and the second oil circuit branch is connected in series with the pressure reducing valve and the second electromagnetic on-off valve, the oil inlet of the three-position four-way electromagnetic valve is connected to the oil pump, the oil return port of the three-position four-way electromagnetic valve is connected to the oil tank, one working oil port of the three-position four-way electromagnetic valve is connected to one end of the two oil circuit branches away from the sweeping brush support cylinder, and one of the rod chamber and the rodless chamber of the sweeping brush support cylinder that is not connected to the two oil circuit branches is connected to another working oil port of the three-position four-way solenoid valve.

2. The sweeping brush floating hydraulic system according to claim 1, characterized in that: The first electromagnetic on-off valve and the second electromagnetic on-off valve are both electromagnetic ball valves.

3. A method for controlling the height of a sweeping operation based on the sweeping floating hydraulic system according to claim 1, characterized in that: Includes steps: Get user instructions; If the instruction is a road sweeping operation instruction, the left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT4 of the second solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump through the second oil circuit branch and the three-position four-way solenoid valve, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank, and the sweep brush support cylinder is actuated to move the sweep brush to the preset operation position; If the instruction is an instruction to end the operation, the left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT3 of the first solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank, and the sweep brush support cylinder is actuated to lift the sweep brush to the highest position; If the instruction is a maintenance instruction, the right-position electromagnet DT2 of the three-position four-way solenoid valve and the electromagnet DT3 of the first solenoid on-off valve are energized, one of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the oil tank through the first oil circuit branch, and the other of the rod chamber and the rodless chamber of the sweep brush support cylinder is connected to the output end of the oil pump, and the movement of the sweep brush support cylinder drives the sweep brush to be lowered.

4. The method for controlling the height of a sweeping operation according to claim 3, characterized in that: Also includes the calibration steps: Get traffic information; The left electromagnet DT1 of the three-position four-way solenoid valve and the electromagnet DT4 of the second solenoid on-off valve are controlled to be energized, and one of the rod chamber and the rodless chamber of the sweep brush support oil cylinder is connected to the output end of the oil pump through the second oil circuit branch and the three-position four-way solenoid valve, and the other of the rod chamber and the rodless chamber of the sweep brush support oil cylinder is connected to the oil tank through the three-position four-way solenoid valve; The outlet pressure of the pressure reducing valve is adjusted multiple times, and after each adjustment, the sweeping brush is controlled to clean the road condition at that location, and the position of the sweeping brush with the best cleaning effect is selected as the working position consistent with the acquired road condition information, and the working position is used as the preset working position corresponding to the road condition information.

5. A sweeping brush assembly, characterized in that: include: A connecting rod, wherein the first end of the connecting rod is rotatably disposed on the body of the road sweeper relative to the body of the road sweeper; a sweeping brush disposed at the second end of the connecting rod; A sweeping brush floating hydraulic system, the sweeping brush floating hydraulic system is the sweeping brush floating hydraulic system as claimed in claim 1 or 2, one of the cylinder body and the piston rod of the sweeping brush supporting cylinder of the sweeping brush floating hydraulic system is used to be rotatably arranged on the body of the road sweeping vehicle relative to the body of the road sweeping vehicle, and the other of the cylinder body and the piston rod of the sweeping brush supporting cylinder is rotatably connected to the connecting rod, and the connecting rod swings up and down with the extension and retraction of the sweeping brush supporting cylinder to drive the sweeping brush to rise and fall.

6. The sweeping brush assembly according to claim 5, characterized in that: It also includes an adjusting rod, the length of which is adjustable and the first end of which is used to be rotatably arranged on the body of the road sweeper relative to the body of the road sweeper, the second end of the adjusting rod and the second end of the connecting rod are respectively rotatably connected to the sweeping brush, and the sweeping brush rotates relative to the connecting rod as the adjusting rod is extended or retracted.

7. The sweeping brush assembly according to claim 6, characterized in that: It also includes a mounting component for setting the sweeping brush assembly on the body of the road sweeper, and the cylinder body and one of the piston rods of the sweeping brush supporting cylinder, the first end of the adjusting rod and the first end of the connecting rod are rotatably connected to the mounting component respectively.

8. The sweeping brush assembly according to claim 7, characterized in that: The mounting component includes a fixed frame, a rotating frame and a driving device, the rotating frame is rotatably arranged on the fixed frame, the fixed frame is used to be arranged on the body of the road sweeper, the cylinder body and one of the piston rods of the sweeping brush supporting cylinder, the first end of the adjusting rod and the first end of the connecting rod are rotatably connected to the rotating frame respectively, the rotation axis of the rotating frame relative to the fixed frame is perpendicular to the rotation axis of the connecting rod relative to the rotating frame, the driving device is arranged on the fixed frame or the body of the road sweeper, and the output end of the driving device is connected to the rotating frame to drive the rotating frame to rotate relative to the fixed frame.

9. A road sweeper, characterized in that: It comprises a sweeping brush assembly as described in any one of claims 5 to 8.

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