CN102505651B - Sweeper driving system of road cleaning vehicle and road cleaning vehicle - Google Patents

Abstract

The invention relates to a sweeper driving system and a road cleaning vehicle comprising the sweeper driving system. The sweeper driving system comprises an oil tank, a hydraulic motor, a hydraulic pump, an overflow valve, an electric control flow rate control valve and a controller, wherein the oil tank is used for storing hydraulic oil, the hydraulic motor is used for driving a sweeper of the road cleaning vehicle for carrying out sweeping operation, the hydraulic pump is communicated with the oil tank and is connected with an oil inlet of the hydraulic motor through an oil inlet path, an oil outlet of the hydraulic motor is communicated with the oil tank through an oil return path, the overflow valve is connected between the oil inlet path and the oil return path, the electric control flow rate control valve is connected in series into the oil return path, and the controller is electrically connected with the electric control flow rate control valve and is used for regulating the flow rate Q1 of hydraulic oil flowing through the electric control flow rate control valve according to the running speed V of the road cleaning vehicle during the sweeping operation. Through the technical scheme, the relevance can be built between the running speed of the road cleaning vehicle and the rotation speed of the sweeper of the road cleaning vehicle, and the sweeping operation can be efficiently carried out according to the running state of the road cleaning vehicle.

Description

The brush drive system of road cleaning cart and road cleaning cart

Technical field

The present invention relates to road cleaning cart field, more particularly, relate to a kind of brush drive unit and road cleaning cart of road cleaning cart.

Background technology

At present, in vast rural area, city, the road cleaning cart is widely used in the road-cleaning operation.Existing road cleaning cart generally includes vehicle body and the entrained clearing apparatus of vehicle body, and this clearing apparatus can comprise the brush that is driven by the brush drive system, can also comprise water sprinkler etc.When the road cleaning cart carried out the road-cleaning operation, the road cleaning cart travelled on the road that will clean, and the brush of clearing apparatus is simultaneously rotated under the driving of fluid power system, so that road is cleaned.

Fig. 1 to Fig. 3 represents the hydraulic pressure brush drive system that three kinds of road cleaning cart are traditional respectively, below respectively to the explanation that makes an explanation of these three kinds of traditional fluid power systems.

Hydraulic pressure brush drive system shown in Figure 1 comprises: fuel tank 10, be used for to drive (a plurality of) hydraulic motor 11 of brush rotation, the bypass throttling arrangements for speed regulation 14 that are connected hydraulic pump 12 between fuel tank 10 and the hydraulic motor 11 and control valve 13 and are used for speed governing, these bypass throttling arrangements for speed regulation 14 are arranged between in-line and the oil return line and comprise three position four-way directional control valve 141 and respectively two actuator ports of this three position four-way directional control valve 141 are connected in two one-way throttle valves 142 and 143 of oil return line.

When carrying out cleaning work, hydraulic pump 12 operations are drawn hydraulic oil from fuel tank 10, and pressure hydraulic oil is transported to hydraulic motor 11 by control valve 13, drive hydraulic motor 11 operations, hydraulic motor 11 drives the brush rotation, and the hydraulic oil of process hydraulic motor 11 flows back to fuel tank 10 again.Utilize above-mentioned bypass throttling arrangements for speed regulation 14, can realize the adjusting to the rotating speed of hydraulic motor 11.Specifically, when three position four-way directional control valve 141 was in meta shown in Figure 1, the hydraulic oil that hydraulic pump 12 is carried flowed to hydraulic motor 11 all, thereby made hydraulic motor 11 obtain the highest rotating speed; When three position four-way directional control valve 141 is in position, a left side shown in Figure 1 or right position, then make the part of the hydraulic oil of hydraulic pump 12 conveyings flow back to fuel tank 10 through this three position four-way directional control valve 141 with corresponding one-way throttle valve, thereby make hydraulic motor 11 obtain low relatively rotating speed.

Hydraulic pressure brush drive system shown in Figure 2 comprises: fuel tank 10, be used for to drive (a plurality of) hydraulic motor 11 of brush rotation, the entrance throttle governing circuit device 15 that is connected hydraulic pump 12 between fuel tank 10 and the hydraulic motor 11 and control valve 13 and is used for speed governing, this entrance throttle governing circuit device 15 can be choke valve.

When carrying out cleaning work, hydraulic pump 12 operations are drawn hydraulic oil from fuel tank 10, and pressure hydraulic oil is transported to hydraulic motor 11 by control valve 13, drive hydraulic motor 11 operations, hydraulic motor 11 drives the brush rotation, and the hydraulic oil of process hydraulic motor 11 flows back to fuel tank 10 again.Utilize above-mentioned entrance throttle governing circuit device 15, can realize the adjusting to the rotating speed of hydraulic motor 11.Specifically, the size of the flow area by regulating entrance throttle governing circuit device 15 can realize the flow of the hydraulic oil that flows to hydraulic motor 11 regulated control and then the rotating speed of regulator solution pressure motor 11.

Hydraulic pressure brush drive system shown in Figure 3 comprises: fuel tank 10, be used for to drive (a plurality of) hydraulic motor 11 of brush rotation, the meter out arrangements for speed regulation 16 that are connected hydraulic pump 12 between fuel tank 10 and the hydraulic motor 11 and control valve 13 and are used for speed governing, these meter out arrangements for speed regulation 16 can be choke valve.

When carrying out cleaning work, hydraulic pump 12 operations are drawn hydraulic oil from fuel tank 10, and pressure hydraulic oil is transported to hydraulic motor 11 by control valve 13, drive hydraulic motor 11 rotations, hydraulic motor 11 drives the brush rotation, and the hydraulic oil of process hydraulic motor 11 flows back to fuel tank 10 again.Utilize above-mentioned meter out arrangements for speed regulation 16, can realize the adjusting to the rotating speed of hydraulic motor 11.Specifically, the size of the flow area by regulating meter out arrangements for speed regulation 16, thus can realize the flow of the hydraulic oil that flows to hydraulic motor 11 regulated control and then the rotating speed of regulator solution pressure motor 11.

By hydraulic motor 11 is carried out speed governing, thus the velocity of rotation of regulating brush, so that what of the quantity of refuse of cleaning work velocity adaptive on the street that will clean of brush.Yet, in traditional hydraulic pressure brush drive system of road cleaning cart, mostly take mode manually to carry out to the speed governing of hydraulic motor 11, and the major defect of this mode of speed regulation manually is:

Because the cab space of road cleaning cart is very narrow, therefore the operating means of artificial speed governing (as regulating handle etc.) is installed in the driver's cabin outside usually, before carrying out the road-cleaning operation, at first operating means is set at the position of reservation, thereby the rotating speed that makes brush is in predetermined level, and then drives to and carry out cleaning work on the road to be cleaned; The brush rotating speed can not arbitrarily be regulated (bypass throttling speed-regulating scheme as shown in Figure 1 continuously in the cleaning process of road cleaning cart, can only realize high, medium and low third gear speed governing), or be not easy to adjusting (entrance throttle governing circuit scheme and meter out speed-regulating scheme as shown in Figures 2 and 3).Therefore, no matter the road cleaning cart is with the operation of travelling of which kind of speed, and the brush speed of road cleaning cart is difficult to carry out conversion, or remains unchanged substantially.

In other words, the major defect of traditional hydraulic pressure brush drive system of road cleaning cart is: the rotating speed of the brush of clearing apparatus can't with the travel speed of road cleaning cart set up related, thereby can not carry out cleaning work efficiently according to the transport condition of road cleaning cart.Influence operation quality or cause brush brooming quick abrasion, increase use cost.

Therefore, how according to the transport condition of road cleaning cart and carry out cleaning work efficiently and become this area technical issues that need to address.

Summary of the invention

The purpose of this invention is to provide a kind of technical scheme, utilize this technical scheme can be according to the transport condition of road cleaning cart, to realize cleaning work efficiently.

To achieve these goals, the invention provides a kind of brush drive system of road cleaning cart, this brush drive system comprises: fuel tank, and this fuel tank is used for stores hydraulic pressure oil; Hydraulic motor, this hydraulic motor are used for the brush of the described road cleaning cart of driving and carry out cleaning work; Hydraulic pump, this hydraulic pump is communicated with described fuel tank and is connected with the oil-in of described hydraulic motor by in-line, and the oil-out of described hydraulic motor is communicated with described fuel tank by oil return line; Overflow valve, this overflow valve are connected between described in-line and the oil return line; Wherein, described brush drive system also comprises: automatically controlled flow control valve, this automatically controlled flow control valve are connected in the described hydraulic motor oil return line; Controller, this controller is electrically connected with described automatically controlled flow control valve, and the travel speed V when being used for carrying out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve of flowing through.

Preferably, it is the control signal of U that described controller is used for sending the value size to described automatically controlled flow control valve, the flow Q1=k of the hydraulic oil of the described automatically controlled flow control valve of flowing through ₁U, k ₁Factor of proportionality for the value size U of the flow Q1 of the hydraulic oil of the described described automatically controlled flow control valve of flowing through and described control signal.

Pass between travel speed V when preferably, the value of described control signal size U and described road cleaning cart carry out cleaning work is:

$U=\left\{\begin{array}{c}{U}_{\min },V=0\\ U_{\min }+k_{2}V,0<V<V_{\max }\\ U_{\max },V\&GreaterEqual;V_{\max }\end{array}\right.$

Wherein, k ₂Be the factor of proportionality between the travel speed V of the value of described control signal size U and described road cleaning cart, V _MaxMaximum travel speed when carrying out cleaning work for the road cleaning cart, U _MaxBe the maximum value of the value of described control signal size U, U _MinMinimum value for the value of described control signal size U.

Preferably, described controller is electrically connected with the control unit for vehicle of described road cleaning cart, is used for the signal of telecommunication of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from the control unit for vehicle of described road cleaning cart; Perhaps, described brush drive system also comprises speed detector, this speed detector is arranged on the described road cleaning cart, travel speed V when carrying out cleaning work for detection of this road cleaning cart, described controller is electrically connected with described speed detector, is used for the signal of telecommunication of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from this speed detector.

Preferably, described brush drive system also comprises automatically controlled directional control valve, the oil-in of described hydraulic motor and oil-out are communicated in described in-line and oil return line by this automatically controlled directional control valve respectively, described controller is electrically connected with described automatically controlled directional control valve, is used for the described automatically controlled directional control valve of control and changes between on-state and off-state.

In addition, the present invention also provides a kind of road cleaning cart, this road cleaning cart comprises vehicle body and the entrained clearing apparatus of this vehicle body, this clearing apparatus comprises the brush that is driven by the brush drive system, wherein, described brush drive system is above-mentioned brush drive system provided by the present invention, and the hydraulic motor of this brush drive system and described brush are in transmission connection, and rotates with the brush that drives described clearing apparatus.

By technique scheme, can between the operation travel speed of the brush rotating speed of road cleaning cart and road cleaning cart, set up related, thereby can carry out cleaning work efficiently according to the operation transport condition of road cleaning cart.

Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.

Description of drawings

Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of manual, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 to Fig. 3 is respectively the schematic diagram of the traditional brush drive system of three kinds of road cleaning cart; With

Fig. 4 is the schematic diagram according to a kind of embodiment of the brush drive system of road cleaning cart of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.

Below with reference to the accompanying drawings the specific embodiment of the present invention is described in detail.As shown in Figure 4, the brush drive system for the road cleaning cart provided by the present invention comprises: fuel tank 10, and this fuel tank 10 is used for stores hydraulic pressure oil; Hydraulic motor 11, this hydraulic motor 11 are used for driving described road cleaning cart (clearing apparatus) brush and carry out cleaning work; Hydraulic pump 12, this hydraulic pump 12 is communicated with and is connected by the oil-in of in-line with described hydraulic motor 11 with described fuel tank 10, and the oil-out of described hydraulic motor 11 is communicated with described fuel tank 10 by oil return line; Overflow valve 18, this overflow valve 18 is connected between described in-line and the oil return line; Wherein, described brush drive system also comprises: automatically controlled flow control valve 30, and this automatically controlled flow control valve 30 is connected in the described oil return line; With controller 40, this controller 40 is electrically connected with described automatically controlled flow control valve 30, and the travel speed V when being used for carrying out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve 30 of flowing through.

Above-mentioned fuel tank 10, hydraulic motor 11 and hydraulic pump 12 can with traditional brush drive system of road cleaning cart in fuel tank, hydraulic motor and hydraulic pump same or similar, annexation also can be with reference to the annexation of fuel tank, hydraulic motor and hydraulic pump in traditional brush drive system.Therefore, no longer this is described in detail here.In simple terms, to shown in Figure 5, when the brush drive system is moved to carry out cleaning work, hydraulic pump 12 will be drawn hydraulic oil and be transported to hydraulic motor 11 by in-line from fuel tank 10 as Fig. 1, drive hydraulic motor 11 runnings, hydraulic oil is back in the fuel tank 10 by oil return line more then.Hydraulic motor 11 can with the clearing apparatus of road cleaning cart in brush be in transmission connection, and drive this brush rotation, thereby carry out cleaning work.

Compare with traditional brush drive system of road cleaning cart, the main improvements of technical scheme of the present invention are on the adjusting control mode to the rotating speed of hydraulic motor 11.Emphatically this is described in detail below.

Compare with traditional brush drive system shown in Figure 1, as shown in Figure 4, be provided with automatically controlled flow control valve 30 in the oil return line of this brush drive system, namely this automatically controlled flow control valve 30 is connected in the described oil return line.In order to realize the adjusting control to automatically controlled flow control valve 30, also be provided with controller 40, this controller 40 is electrically connected with described automatically controlled flow control valve 30, and the travel speed V when being used for carrying out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve 30 of flowing through.

As shown in Figure 4, the total flow of the hydraulic oil of hydraulic pump 12 pumpings is Q, and the part of hydraulic oil flows to hydraulic motor 11 then, moves to drive hydraulic motor 11, and then flows back to fuel tank 10 by automatically controlled flow control valve 30; Another part hydraulic oil then can flow back to fuel tank 10 by bypass circulation (as by overflow valve 18).Wherein, the flow of the hydraulic oil of the hydraulic motor 11 of flowing through is Q1, and the flow of the hydraulic oil of the bypass circulation of flowing through is Q2, Q=Q1+Q2.Utilize controller 40, by regulating the flow area of automatically controlled flow control valve 30, thereby can regulate the flow Q1 of the hydraulic oil of the in-line of flowing through, to realize the adjusting to the rotating speed of hydraulic motor 11.

In traditional brush drive system, as mentioned above, the cleaning rotating speed mostly is manually to be regulated by human pilot, before carrying out cleaning work with the speed setting of hydraulic motor 11 at predeterminated level, and in the cleaning work process, the brush rotating speed of clearing apparatus can not be regulated (regulating as carrying out third gear at most) easily and maybe can not regulate.Therefore, no matter treat on the road quantity of refuse what, in case the road cleaning cart has started cleaning works, then brush always can be carried out cleaning work according to certain rotating speed.Thereby the rotating speed of the brush of road cleaning cart can not be complementary with the travel speed of road cleaning cart, to realize high efficiency cleaning work.For example, for the lower workplace of the travel speed of road cleaning cart, because the brush of clearing apparatus still is rotated with higher relatively speed, be easy to cause brush brooming quick abrasion, increase use cost.

But, for technical scheme of the present invention, travel speed V when controller 40 can carry out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve 30 of flowing through, the operation rotary speed that the difference of the travel speed V in the time of therefore can carrying out cleaning work according to described road cleaning cart is regulated the brush of clearing apparatus.For example, the travel speed V that can realize the road cleaning cart hour also correspondingly diminishes the velocity of rotation of brush, with the degree of reducing wear (will be described hereinafter about this point); Perhaps, in the time of can realizing that also the travel speed V of road cleaning cart is higher, improve the rotary speed of brush, to guarantee the cleaning effect.In a word, in technical scheme of the present invention, travel speed V when controller 40 carries out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve 30 of flowing through, thereby the rotating speed of the brush in the travel speed V when the road cleaning cart is carried out cleaning work and the road cleaning cart clearing apparatus associates, thereby according to the transport condition of road cleaning cart and carry out cleaning work efficiently, can overcome the problems referred to above that exist in traditional technical scheme, to realize purpose of the present invention.

Above-mentioned automatically controlled flow control valve 30 can be for the various traditional valve elements that can realize flow-control, as various automatically controlled choke valves (automatically controlled flow control valve or flow speed control valve).Above-mentioned controller 40 can be single-chip microcomputer, computer, PLC etc.Particular type and the parameter of automatically controlled flow control valve 30 and controller 40 can be selected according to concrete application operating mode to be suitable for.

Controller 40 can be electrically connected with automatically controlled flow control valve 30 in several ways, as utilizing wired or wireless mode.As shown in Figure 4, it is the control signal N1 of U that controller 40 can be used for sending the value size to automatically controlled flow control valve 30, and the pass between the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve 30 of flowing through and the value size of control signal N1 is Q1=k ₁U, wherein, k ₁Be the factor of proportionality of the value size U of the flow Q1 of the hydraulic oil of the described described automatically controlled flow control valve 30 of flowing through and described control signal, k ₁The characterisitic parameter that belongs to automatically controlled flow control valve 30.Therefore, by regulating the value size U of control signal N1, just can regulate the flow Q1 of the hydraulic oil of the automatically controlled flow control valve 30 of flowing through, and then the rotary speed of hydraulic motor 11 is regulated.

Controller 40 can send the control signal of multiple standard to automatically controlled flow control valve 30, as direct current signal, AC signal, frequency modulated signal, pulse-width signal and serial data signal, but preferably selects pulse-width signal (pwm control signal).

As mentioned above, preferably, have between the travel speed V the when value of described control signal size U carries out cleaning work with described road cleaning cart related, thereby when the travel speed V of road cleaning cart than hour, the velocity of rotation of brush is also correspondingly diminished, with the degree of reducing wear.Relation between travel speed V when specifically, the value of described control signal size U and described road cleaning cart carry out cleaning work can for:

$U=\left\{\begin{array}{c}{U}_{\min },V=0\\ U_{\min }+k_{2}V,0<V<V_{\max }\\ U_{\max },V\&GreaterEqual;V_{\max }\end{array}\right.,$ Wherein, k ₂Be the factor of proportionality between the travel speed V of the value of described control signal size U and described road cleaning cart, this k ₂The control model value U of automatically controlled flow control valve correspondence in the time of can be according to the highest and minimum operating speed of described brush _Max, U _MinAnd the maximum travel speed of road cleaning cart and the minimum rate signal V that speed detector detects when sailing speed _Max,

V=0 calculates and determines; V _MaxMaximum travel speed when carrying out cleaning work for the road cleaning cart, U _MaxBe the maximum value of the value of described control signal size U, U _MinMinimum value for the value of described control signal size U.

Utilize this technical scheme can avoid described brush brooming quick abrasion, change frequently, reduce use cost, improve cleaning work efficient.And the reentrainment of dust that can also avoid causing because of brush rotating speed height pollutes.

Specifically, when the travel speed V of road cleaning cart was zero, when namely this road cleaning cart stopped operation, then the value of described control signal size U got minimum value, thereby made Q1 minimum (even Q1 is zero), and the rotating speed of brush rotates more slowly or not.In this case, can avoid the unnecessary wearing and tearing of brooming, reduce airborne dust.

Along with the increase of the travel speed V of road cleaning cart, the value U of described control signal increases, and then Q1 is increased, thereby the rotating speed of the brush of clearing apparatus is also correspondingly increased thereupon.In this case, along with the operation travel speed V of road cleaning cart increases, be to guarantee sweeping efficiency and effect, sweep the dish rotating speed thereupon ratio accelerate, can between sweeping efficiency and brooming wearing and tearing, obtain the effect of desirable balance.When the travel speed V of road cleaning cart gets maximum value V _MaxThe time, it is maximum that the cleaning speed of clearing apparatus also can reach.

The rotating speed of brush depends on the rotation speed n of hydraulic motor, and the commentaries on classics degree n of hydraulic motor depends on the flow Q of the hydraulic oil of the hydraulic motor of flowing through ₁, i.e. rotation speed n=the Q of hydraulic motor ₁/ q, wherein, q is the discharge capacity of hydraulic motor.As mentioned above, the flow through flow Q of hydraulic oil of hydraulic motor ₁=k ₁* U.

Thereby the pass between the rotation speed n of hydraulic motor and the Vehicle Speed V is:

$n=\left\{\begin{array}{c}\frac{k_1{U}_{\min }}{q},V=0\\ \frac{k_1{U}_{\min }}{q}+\frac{k_1{k}_{2}V}{q},0<V<V_{\max }\\ \frac{k_1{U}_{\min }}{q}+\frac{k_1{k}_2{V}_{\max }}{q},V\&GreaterEqual;V_{\max }\end{array}\right.$

Because k ₁, k ₂, q, U _MinBe constant, order $n_{\min }=\frac{k_1{U}_{\min }}{q},$ $n_{\max }=\frac{k_1{U}_{\min }}{q}+\frac{k_1{k}_2{V}_{\max }}{q}$

Then, the rotation speed n of hydraulic motor is

$n=\left\{\begin{array}{c}{n}_{\min },V=0\\ n_{\min }+k_1{k}_{2}V,0<V<V_{\max }\\ n_{\max },V\&GreaterEqual;V_{\max }\end{array}\right.$

Therefore, by above-mentioned analysis as can be known, when operating personnel started vehicle and carry out cleaning operation, the rotating speed of brush followed that the speed of a motor vehicle is linear to be increased, when reaching V _MaxThe time, the rotating speed of brush reaches maximum n _Max, and keep this speed.Simultaneously, along with the reduction of Vehicle Speed, the rotating speed of brush is linear decline thereupon.

Travel speed V when described road cleaning cart carries out cleaning work can obtain in several ways.For example, described controller 40 can be electrically connected with the control unit for vehicle of described road cleaning cart, is used for the signal of telecommunication of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from the control unit for vehicle of described road cleaning cart.That is to say the information of the travel speed V when controller 40 can directly carry out cleaning work by control unit for vehicle (ECU) acquisition of road cleaning cart about the road cleaning cart.This mode need be when the road cleaning cart arrange extra parts or device and obtains the road cleaning cart and carry out cleaning work the relevant information of travel speed V.

Perhaps, described brush drive system also comprises speed detector 50, this speed detector 50 is arranged on the described road cleaning cart, travel speed V when carrying out cleaning work for detection of this road cleaning cart, described controller 40 is electrically connected with described speed detector 50, is used for the signal of telecommunication N2 of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from this speed detector 50.That is to say, be provided for detecting the speed detector 50 of its travel speed at the road cleaning cart, and the signal of telecommunication N2 of the expression road cleaning cart travel speed V that this speed detector 50 is obtained sends to controller 40.In this mode, speed detector need be set separately on the road cleaning cart.

Preferably, described brush drive system also comprises automatically controlled directional control valve 17, the oil-in of described hydraulic motor 11 and oil-out are communicated in described in-line and oil return line by this automatically controlled directional control valve 17 respectively, described controller 40 is electrically connected with described automatically controlled directional control valve 17, is used for the described automatically controlled directional control valve 17 of control and changes between on-state and off-state.Automatically controlled directional control valve 17 is under the control of controller 40, as the switch valve of hydraulic motor 11.Certainly, also can adopt the direction valve of manual manipulation.

More than the brush drive system of road cleaning cart provided by the present invention is described in detail, in addition, the present invention also provides a kind of road cleaning cart, this road cleaning cart comprises vehicle body and the entrained clearing apparatus of this vehicle body, this clearing apparatus comprises the brush that is driven by the brush drive system, and wherein, described brush drive system is above-mentioned brush drive system provided by the present invention, hydraulic motor 11 and the described brush of this brush drive system are in transmission connection, to drive the brush rotation.

By above description as can be known, it is related to utilize technical scheme of the present invention the rotary speed of the brush of the clearing apparatus of road cleaning cart and the travel speed of road cleaning cart can be set up, thereby can carry out cleaning work efficiently according to the transport condition of road cleaning cart.

Below describe preferred embodiment of the present invention by reference to the accompanying drawings in detail; but; the present invention is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.

Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up by any suitable manner, and be not limited to the restriction of the adduction relationship of the every claim of claims.

In addition, also can carry out any combination between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (6)

1. the brush drive system of road cleaning cart, this brush drive system comprises:

Fuel tank (10), this fuel tank (10) is used for stores hydraulic pressure oil;

Hydraulic motor (11), this hydraulic motor (11) are used for the brush of the described road cleaning cart of driving and carry out cleaning work;

Hydraulic pump (12), this hydraulic pump (12) is communicated with described fuel tank (10) and is connected by the oil-in of in-line with described hydraulic motor (11), and the oil-out of described hydraulic motor (11) is communicated with described fuel tank (10) by oil return line;

Overflow valve (18), this overflow valve (18) is connected between described in-line and the oil return line;

It is characterized in that described brush drive system also comprises:

Automatically controlled flow control valve (30), this automatically controlled flow control valve (30) is connected in the described oil return line;

Controller (40), this controller (40) is electrically connected with described automatically controlled flow control valve (30), and the travel speed V when being used for carrying out cleaning work according to described road cleaning cart regulates the flow Q1 of the hydraulic oil of the described automatically controlled flow control valve (30) of flowing through.

2. brush drive system according to claim 1, wherein, it is the control signal of U that described controller (40) is used for sending the value size to described automatically controlled flow control valve (30), the flow Q1=k of the hydraulic oil of the described automatically controlled flow control valve (30) of flowing through ₁U, k ₁Factor of proportionality for the value size U of the flow Q1 of the hydraulic oil of the described described automatically controlled flow control valve (30) of flowing through and described control signal.

3. brush drive system according to claim 2, wherein, the pass between the travel speed V the when value of described control signal size U and described road cleaning cart carry out cleaning work is:

$U=\left\{\begin{array}{c}{U}_{\min },V=0\\ U_{\min }+k_{2}V,0<V<V_{\max }\\ U_{\max },V\&GreaterEqual;V_{\max }\end{array}\right.$

Wherein, k ₂Be the factor of proportionality between the travel speed V of the value of described control signal size U and described road cleaning cart, V _MaxMaximum travel speed when carrying out cleaning work for the road cleaning cart, U _MaxBe the maximum value of the value of described control signal size U, U _MinMinimum value for the value of described control signal size U.

4. brush drive system according to claim 1, wherein, described controller (40) is electrically connected with the control unit for vehicle of described road cleaning cart, is used for the signal of telecommunication of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from the control unit for vehicle of described road cleaning cart; Perhaps, described brush drive system also comprises speed detector (50), this speed detector (50) is arranged on the described road cleaning cart, travel speed V when carrying out cleaning work for detection of this road cleaning cart, described controller (40) is electrically connected with described speed detector (50), is used for the signal of telecommunication of the travel speed V when obtaining the described road cleaning cart of expression and carry out cleaning work from this speed detector (50).

5. according to any described brush drive system among the claim 1-4, wherein, described brush drive system also comprises automatically controlled directional control valve (17), the oil-in of described hydraulic motor (11) and oil-out are communicated in described in-line and oil return line by this automatically controlled directional control valve (17) respectively, described controller (40) is electrically connected with described automatically controlled directional control valve (17), is used for the described automatically controlled directional control valve of control (17) and changes between on-state and off-state.

6. road cleaning cart, this road cleaning cart comprises vehicle body and the entrained clearing apparatus of this vehicle body, this clearing apparatus comprises the brush that is driven by the brush drive system, it is characterized in that, described brush drive system is any described brush drive system among the claim 1-5, and the hydraulic motor of this brush drive system (11) is in transmission connection with described brush.

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