WO2014059480A1 - Vehicle for line marking - Google Patents
Vehicle for line marking Download PDFInfo
- Publication number
- WO2014059480A1 WO2014059480A1 PCT/AU2013/001203 AU2013001203W WO2014059480A1 WO 2014059480 A1 WO2014059480 A1 WO 2014059480A1 AU 2013001203 W AU2013001203 W AU 2013001203W WO 2014059480 A1 WO2014059480 A1 WO 2014059480A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- actuator
- steering
- vehicle
- rotation
- shaft
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/20—Connecting steering column to steering gear
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C19/00—Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
- A63C19/06—Apparatus for setting-out or dividing courts
- A63C19/065—Line markings, e.g. tapes; Methods therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/005—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 mounted on vehicles or designed to apply a liquid on a very large surface, e.g. on the road, on the surface of large containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
- B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/16—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings
- E01C23/20—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ
- E01C23/22—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ by spraying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C19/00—Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
- A63C19/06—Apparatus for setting-out or dividing courts
- A63C19/065—Line markings, e.g. tapes; Methods therefor
- A63C2019/067—Machines for marking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/61—Secondary circuits
- F15B2211/613—Feeding circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
Definitions
- This invention relates to vehicle particularly suitable as an apparatus for applying markings to surfaces such as roads, sports playing surfaces, car parks and other areas where permanent or temporary markings are desired. These types of apparatus are herein referred to as line marking apparatus.
- line marking apparatus In order to meet a market for line marking apparatus, three different types of apparatus have been developed. Two of these types of line marking apparatus are large self- propelled machines that are used for big areas and the fast marking of roads. The largest of these are based on conventional trucks that are modified to carry over a thousand litres of paint and cover large distances. These apparatus are useful for roads with wide radius bends and are able to mark such roads quickly without reloading or stopping. The second type are a little smaller and more manoeuvrable. It generally weighs over a tonne and is suitable for areas such as large car parks and sports fields with tighter radius bends but unrestricted access.
- the third type which is most closely related to the invention, are small hand pushed machines that are used mainly for detail work around intersections or indoor painting. They are often set up with a second paint gun that can be used freehand for features that are not suited to being painted as a continuous line. An example, the second paint gun would be used to paint the arrows at intersections. This type of work is usually done with a stencil.
- the object of the present invention is to produce an apparatus which is manoeuvrable enough to do the most detail of line work and directionally stable enough to paint longer straight lines.
- a vehicle comprising a frame, wheels supporting the frame, at least one of the wheels being a directional wheel which determines the direction of movement of the vehicle, and a steering mechanism including a mounting for the directional wheel, the mounting including a steering shaft having an axis about which the directional wheel rotates to direct the direction of movement of the apparatus, the steering shaft being coupled to a steering actuator whereby rotation of the steering actuator produces a corresponding rotation of the steering shaft; an control actuator responsive to an operator control device; and a universal joint providing mechanical engagement between the control actuator and the steering actuator, the axis of rotation of the cpntrol actuator being at an angle of 20° to 70°, preferably 20° to 60° and more preferably 30° to 60° to the axis of rotation of the steering actuator, the control actuator having a first alignment corresponding to all wheels including the directional wheel being aligned, whereby rotation of the control actuator produces a variable rotation of the steering actuator depending on the rotation of the control actuator away from the first alignment.
- variable ratio steering system which enables the directional wheel to be able to rotate as much as 200° (ie 100° either side of straight line alignment) with the rate at which the wheel rotates reducing the further the wheel is rotated away from the straight line alignment.
- a single universal joint between a primary steering mechanism and the secondary steering mechanism By inclining the actuator wheel of the primary steering mechanism steering wheel at an angle to the steering actuator of the secondary steering mechanism back towards the operator, the natural operation of the universal joint to alter the speed at which two shafts turn relative to each other as the universal joint rotates can be utilised to give the effect of producing a small rotation of the directional wheel when a rotation is applied to the steering wheel effectively producing a slow rotation when the directional wheel is substantially pointed straight ahead, and producing a larger rotation when the same corresponding rotation is applied when the directional wheel is rotated out of away from the straight ahead alignment.
- This has the effect of speeding the steering up when turning sharply either left of right without restricting steering angle.
- the mounting including a steering shaft having an axis about which the directional wheel rotates to direct the direction of movement of the apparatus, the steering shaft being coupled to a steering actuator whereby rotation of the steering actuator produces a corresponding rotation of the steering shaft;
- a universal joint providing mechanical engagement between the control actuator and the steering actuator, the axis of rotation of the control actuator being at an angle of 20° to 70° to the axis of rotation of the steering actuator, the control actuator having a first alignment corresponding to all wheels including the directional wheel being aligned,
- an hydraulic pump circuit comprising: a closed centre variable displacement pump hydraulically connected to a linear motor driven spray device, the hydraulic circuit comprising: an hydraulic supply line to the hydraulically driven linear motor; an hydraulic return line to the pump; a reservoir for hydraulic fluid; and a charge pump providing hydraulic fluid from the reservoir to maintain the volume of hydraulic fluid in the circuit; characterised in that the supply line including a check valve and a high pressure accumulator between the check valve and the linear motor of the spray device to dampen pressure fluctuations in the supply line and a pressure actuated ram responsive to deactivate the pump upon pressure at the linear motor exceeding a preset value; and the return line including a low pressure accumulator to dampen fluctuations in the return line and a bypass line to return excess hydraulic fluid to the reservoir ; the bypass line being provided with a restrictor preferably adjustable to control the flow of excess hydraulic fluid to the reservoir.
- the hydraulic circuit may further comprise a second circuit comprising a second closed centre variable displacement pump hydraulically connected to a drive motor for at least one wheel of
- Figure 1 is a perspective view from below of the a partially assembled line marking apparatus
- Figure 2 is a front perspective view of the apparatus of Figure 1 ;
- Figure 3 is a perspective view of the apparatus of Figure 1 from above;
- Figure 4 is an exploded view of section A of Figure 3;
- Figure 5 is a schematic diagram of the paint motor hydraulic circuit
- Figure 6 is schematic diagram of the circuit of figure 6 with the drive motor hydraulic circuit
- Figure 7 is a partial view of the pump motor assembly
- FIGS 8a, 8b, 8c, 8d are schematic diagrams showing operation of the accelerator according to an aspect of the invention.
- Figure 9 is a front view of the line marking vehicle illustrating the paint spray nozzle control
- Figure 10 is a side view of the line marking vehicle illustrating the paint spray nozzle control
- Figure 11 (a) and 11 (b) are respectively a perspective view and top view of the line marking vehicle illustrating the paint spray nozzle control.
- the apparatus 1 includes a frame 2, and wheels 3, 4, 5 supporting the frame 2. At least one of the wheels 5 is a directional wheel which determines the direction of movement of the apparatus 1.
- the apparatus includes a steering mechanism 10 including a primary and secondary steering mechanism.
- the primary steering mechanism including a mounting 11 for the directional wheel 5, the mounting 1 including a steering shaft 12 having an axis about which the directional wheel 5 rotates to direct the direction of movement of the apparatus.
- the steering shaft 12 is coupled through a shaft actuator to a steering actuator both of which may be in the form of a corresponding wheel or sprocket whereby rotation of the steering actuator 13 produces a corresponding rotation of the shaft actuator 14.
- the shaft actuator is preferably fixed onto steering shaft 12, and the steering shaft and shaft actuator are axially aligned, rotation of the steering shaft 12 corresponds to rotation of the shaft actuator.
- this corresponding rotation between the steering actuator 13 and the shaft actuator 14 is provided by a linkages, chain or belt drive 15 cooperating between a shaft sprocket 14 and steering actuator 13.
- a linkages, chain or belt drive 15 cooperating between a shaft sprocket 14 and steering actuator 13.
- the respective rates of rotation of the actuators will correspond to the diameter ratios of the actuators, thus providing a proportional reduction or increase in the rate of rotation of the steering actuator 14 relative to the shaft actuator and steering shaft 12.
- the steering actuator 13 is engaged with a universal joint 16.
- the secondary steering mechanism includes a control actuator 21 which may be in the form of a wheel or sprocket responsive to an operator control device such as a steering wheel 22.
- the steering wheel is mounted in a fixed position on the frame for rotation on a steering column shaft 23 having about an axis.
- the steering column shaft 23 having about an axis.
- control actuator 21 mechanically cooperates or engages with the control actuator 21 preferably by means of a cog at the end of the steering column shaft 23 engaging through a column actuator in the form of a groove or guide channel in the shaft with a chain or belt which in turn engages the control actuator 21.
- the universal joint provides mechanical engagement between the control actuator 21 and the steering actuator 13, the axis of rotation of the control actuator being at an angle of 30° to 60° to the axis of rotation of the steering actuator or sprocket 21.
- the control actuator has a first alignment corresponding to all wheels including the directional wheel being aligned. In operation, rotation of the control actuator 21 produces a variable rotation of the steering actuator 13 depending on the rotation of the control actuator away from the first alignment.
- the universal joint comprises a first U shaped mount 40 having the base of the U fixed to the steering actuator 13 at the centre of rotation of the steering actuator 13 and a second U- shaped mount 41 fixed to the centre of rotation of the control actuator 21.
- the first and second U-shaped mounts 41 , 40 are each provided with hinge pins which cooperate with the corresponding hinge pin through a common connection body 42.
- the axis of the hinge pins is orthogonal through the common connection body 42.
- Universal joints also known as Cardan joints have the
- the variation in the speed of the driven shaft depends on the configuration of the joint and particularly the respective angles of rotation of the respective axles.
- a constant rotation of the operator controlled steering wheel and control actuator 21 of the second steering mechanism provides a variable rotational output of the steering actuator 13 and a corresponding rotation of the directional wheel of the primary steering system.
- variable ratio steering system which enables the directional wheel to be able to rotate as much as 200° (ie 100° either side of straight line alignment) with the rate at which the directional wheel rotates reducing the further the steering wheel is rotated away from the straight line alignment.
- the alignment of the universal joint is a highly preferred aspect of the invention.
- the axis of the two bearing cups (U-shaped mounts) attached to the primary steering mechanism and secondary steering mechanisms must be in line with the direction of forward travel towards the directional wheel 5.
- the axis of the hinge pin, attached to the steering actuator is aligned in the direction of travel, particularly in the straight line direction of travel.
- the axis of the hinge pin of the control actuator is a aligned orthogonal to the axis of the hinge pin of the steering actuator through the connection body 42 giving it an alignment which is initially perpendicular to the direction of travel. This ensures that the degree of turn of the steering wheel to either side needed to turn the directional wheel 5 is the same in both directions of turn. Additionally a 90 degree rotation to in a clockwise direction will result in the same degree of turn in the opposite direction as a 90 degree turn to in a counterclockwise direction.
- the propulsion of the vehicle or apparatus is provided by a drive motor which will be described in greater detail below.
- the speed of the apparatus is controlled by the operator using a pedal 30 which is engaged with the power supply to speed up or slow down the ground speed of the vehicle or apparatus.
- the pedal 30 is mounted for rotation to the frame 2 about a pivot axis 31 , preferably provided by a control rod 32.
- the steering sprocket 13 is mounted to a shaft 24 which is provided with a cylindrical contoured cammed wheel 34 which rotates with the sprocket 13 on shaft 24.
- the cammed wheel 34 engages with a fixed extension on the control rod 33 which limits pivotal movement of the control rod 32.
- the cam engages the control rod.to rotate the control rod forcing the pedal to pivot back towards the operator.
- This has the effect of reducing the travel of the pedal, reducing the power from the propulsion unit and slowing the vehicle.
- This provides a governing system which reduces the risk of the vehicle turning too quickly while under power and toppling over.
- One aspect of the invention is the ability of the apparatus to turn at right angles.
- it is also desirable to mount the propulsion motor directly to the directional wheel or wheels that steer the machine. This allows the directional wheel(s) to turn through 160 degrees and more on a substantially vertical axis.
- propulsion is hydraulic which will be described in greater detail below.
- the design would lend itself to electric motors or mechanical drive if the power was to be sent via a shaft through the centre of the steering axis of the wheel(s) then through a right angle drive.
- This arrangement would be more complex but may be more efficient in a larger version of the machine designed for larger jobs.
- the nature of the work that line marking vehicles perform falls into two main functions; namely painting and travelling.
- the painting function requires the speed of the apparatus to be controlled precisely to get optimum paint coverage; too quickly and the paint goes on too thinly and too slowly and the paint goes on too thickly which wastes paint and can even adversely affect the life of the paint by increasing drying times and thickness.
- a further aspect of the invention provides a throttle control for a vehicle comprising a pivotally mounted accelerator pedal 30, a proportional actuator responsive to pivotal movement of the accelerator pedal between a first position and a full range position.
- This aspect also relates to an accelerator pedal for use with a vehicle.
- the accelerator pedal 30 (figure 8c and 8d) includes a first engagement position 50 which permits the operator to apply the full range of pivotal motion to the floor of the vehicle and a second engagement position 51 which permits the operator less than the full range of pivotal motion.
- the accelerator pedal 30 is preferably a lever arm 52 pivotally mounted at a first end to a throttle mount.
- the first engagement position 50 is at the second end of the lever arm distal to the throttle mount (not shown) and the second engagement position 51 is intermediate the throttle mount and the first engagement position 50.
- the speed of the apparatus can be controlled by a foot operated accelerator pedal 30.
- a foot operated accelerator pedal urges the apparatus to full speed when the accelerator pedal is fully depressed. This is the case with the accelerator pedal of the applicant however by adding a second accelerator pedal at a second engagement position, under the first engagement position and providing a well or opening in the floor of the vehicle allowing it to travel past the foot plate and into the well when the accelerator pedal is fully depressed from the first engagement position allows for a second travel position.
- the second engagement position between the first engagement position and the mount of the accelerator pedal is in a position that the operator can instantly find, simply by putting his foot on the lower accelerator pedal and pushing it through a limited range of motion to the floor of the vehicle. Having the second engagement position approximately two centimetres from the end of the foot plate or floor allows for small incremental adjustments.
- the range of motion from the second engagement position may be adjusted by moving the second engagement position towards the first engagement position to allow for different speeds required for differing width lines and vehicle speeds.
- the infinitely variable pump used in one aspect of the invention is also reversible.
- the linkage may be designed so that raising it above a detent that holds it in the neutral position (See diagram 8a and 8b) will make the machine reverse without the need for extra controls. This is advantageous where a frequent change of direction is expected thus making the machine more productive.
- the top accelerator pedal works like a conventional accelerator in this mode of travel.
- a further aspect of the invention is the means to operate the paint gun on the line marker or line striper.
- the width of a line produced by a machine can be adjusted by three basic methods. The first two involve either replacing the tip with one having a different spray fan angle or by rotating the tip to increase or reduce the width of the line.
- the tips produce a flat oval shape spray and are normally operated with the longest dimension of the oval at right angles to the travel direction of the line marker. The width of the line can thus be adjusted.
- the tips are also available in a variety of orifice sizes and spray angles. The greater the size of the orifice the greater the amount of paint per hour and hence the faster a machine can travel and still deliver enough paint to produce the right paint thickness.
- the tips are also available in differing spray angles, the greater the angle the wider the line produced given a fixed height off the surface. Neither of these options is all that convenient for making fast adjustments to the width of a line.
- the easiest and most common method is to raise and lower the paint gun on a largely vertical shaft and have it clamped in position. This has been the standard method for a number of years however even this method has its short comings. Because
- paint temperature and paint type all play a role in determining the width of spray coming out of given tip there is always slight adjustments to achieve the width of line required. This often means setting the height of the gun making a test spray measuring the width produced then making fine adjustments either up or down to achieve the desired line width.
- the paint gun is normally mounted at the opposite end of the machine to the operator and this can lead to a lot of walking back and forward to adjust the width of the line.
- the apparatus to control the operation of the paint spray nozzle according to an embodiment of one aspect of the invention is shown in figures 9, 10, 11 (a) and 11 (b).
- figures 9, 10, 11 (a) and 11 (b) To make line width adjustment more convenient we have devised an apparatus and ⁇ method to make the adjustment from the operator's position.
- the gun (not shown) is placed on a bracket 77 mounted to shaft 76 then goes through a sleeve 75.
- the bracket 77 is operated by a threaded bolt 71 extending back to the operator position.
- a tube 70 is placed that has a handle 72 mounted at the operator's end. This handle 72 is mounted at close to right angles to the tube 70.
- a lever 73 is at right angles to the tube 70.
- this lever 73 At the end of this lever 73 is a linkage 74, the linkage 74 joins the lever 73 to the paint gun so that when the handle 72 makes the tube 70 rotate, the paint gun (not shown) on the bracket 77 is either raised or lowered depending on the operators desire to make the line wider or narrower. The gun can then be locked in place by the extended bolt and bracket. Additionally the linkage 74 allows for the gun to be held in its raised position without the need to lock the clamp. This is achieved by having the linkage 74 go over centre when the paint gun is in the fully raised position. This improves ease of operation as well as making the machine safer by removing the need to get off and on the machine.
- an hydraulic system to drive a paint pump preferably using a variable displacement closed centre pump.
- Machines of the size contemplated by the applicant mainly use small fast stroking piston pumps which have taken over from earlier diaphragm style pumps. Both these designs run at high speed and are prone to high wear and difficulties in priming, high frequency pulsing and a tendency for check valves to block with paint are common problems.
- the latest designs are using hydraulic driven paint pumps that have a similar paint piston to the faster stroking piston pumps (displacement pumps).
- the piston on the new hydraulic driven machines is driven up and down by a linear hydraulic motor; the motor is drive by an open centre hydraulic pump. These machines supply oil to the hydraulic paint motor. When the machine is not painting the oil that would normally go to the motor is put through a bypass valve and continues to circulate.
- open centre pumps The problem with open centre pumps is that the oil is heated by this pumping and the machines require a large fan and cooling fins around the oil reservoir to dissipate the heat. This dissipated heat is waste energy.
- the applicants have developed a system which utilises the same types of hydraulic motor and paint pump as current systems but employs a closed centre variable displacement hydraulic pump.
- the system of this aspect of the invention automatically senses when the paint stops flowing and stops the oil flow.
- the pressure sensing and pump flow control is hydraulic / mechanical; however it could be done electronically. This pressure compensated system gives infinitely variable pressure and volume control.
- an hydraulic pump circuit comprising: a closed centre variable displacement pump 100 hydraulically connected to a linear motor driven spray device 101 , the hydraulic circuit comprising: an hydraulic supply line 105 to the hydraulically driven linear motor 101; an hydraulic return line 106 to the pump 100; a reservoir 117 for hydraulic fluid; and a charge pump 108 providing hydraulic fluid from the reservoir 117 to maintain the volume of hydraulic fluid in the circuit; characterised in that the supply line 105 including a check valve 107 and a high pressure accumulator 109 between the check valve 107 and the linear motor 101 of the spray device to dampen pressure fluctuations in the supply line 105 and a pressure actuated ram 102 responsive to deactivate the pump 100 upon pressure at the linear motor 01 exceeding a preset value; and the return line 106 including a low pressure accumulator 110 to dampen fluctuations in the return line 106 and a bypass line 111 to return excess hydraulic fluid to the reservoir 117; the bypass line 111 being
- the closed centre variable displacement oil pumps 100 used in this aspect of the invention are activated manually by a lever 104 through the body of the pump the "slave lever".
- the pump 100 is engaged by pulling the lever into position with a spring.
- the pump 100 then pumps oil to the paint motor 101 until it is disengaged or the paint stops flowing.
- the oil pressure increases and a small single acting hydraulic ram 102 pushes the slave lever 104 back to the neutral position.
- the ram 102 is mounted so that a small change in pressure produces a large movement in the slave lever 104. This is done so that the paint pressure remains constant regardless of the amount of paint being used.
- the cable that pulls the slave lever into position is controlled by a master lever 103 similar to that used on fork lift hand brakes.
- the master lever 103 also incorporates an adjusting knob that makes it convenient to make fine adjustments to the pressure of the oil and hence the paint. High Pressure No Flow
- a potential problem with operation of closed centre variable displacement pumps 100 is the inability of such pumps to maintain high pressure without delivering oil.
- the design of the pumps is such that they are subject to high wear rates caused by the combination of small oil flows and high pressure and temperatures that are present in the pump when maintaining pressure close to the maximum deliverable but without the oil flow that would normally cool and lubricate them.
- the applicants we have placed a check valve 107 between the oil pump 100 and the linear motor 101 that drives the paint pump 100 so that pressure in line 107 at the linear motor 101 can remain high and hence maintain pressure on the paint without the need for pressure at the oil pump 100.
- An oil line 113 tapped in between the check valve 107 and the linear motor 101 delivers this pressurised oil to the hydraulic ram 102 that controls the paint pump 100. This has the effect of shutting the oil pump 100 down once the oil pressure rises due to the operator ceasing to paint.
- the nature of the closed centre pumps is such that they quickly drop pressure on the delivery side once the slave lever 104 has been returned to the neutral position by the hydraulic ram 102.
- the ram 102 is compressed by the spring 114 and this reactivates the oil pump. Inconsistent Oil Flow Return
- closed centre oil pumps are such that they require close to the same amount of oil to be returned to the intake side of the pump 100 as is delivered from the outlet side. This problem is that unlike conventional pumps that take all the intake oil from a reservoir that is topped up by the oil being dumped directly to it once it has done its work, the oil going to the intake side of a closed centre oil pump comes directly to it after doing its work.
- a small discrepancy in the amount of oil can be made up by the charge pump 108.
- This is a small capacity pump that pressurises the closed centre pump 100.
- These pumps are positive displacement pumps that are usually mounted on the back of the closed centre oil pump.
- the need for a charge pump 108 can be eliminated if the reservoir oil is above the closed centre oil pump and gravity produces the required pressure to eliminate the cavitation that lack of oil supply can cause.
- the relevance to this aspect of the invention is that the oil returning from linear hydraulic motors such as the one we use is not returned as a steady flow.
- the nature of the hydraulic motor 101 is such that all the oil is displaced from the hydraulic motor 101 during its upward stroke when the activating rod is pushed into the body of the motor.
- a bypass line 111 was added into the line from the hydraulic paint motor 101 to the closed centre hydraulic pump 100 and routed directly to the reservoir. This allowed the extra oil introduced by the charge pump to be bled back out of the system during the high point in the return flow.
- a restrictor which is preferable adjustable was put into the bypass line to stop too much excess oil returning to the reservoir which could result in cavitation.
- the preferred embodiment includes two closed centre oil pumps 100, 200 operating in tandem with the second pump 200 operating to supply drive motor 116 of the drive system for the front wheel 5.
- the two closed centre pumps are powered by an internal combustion engine although other types of power supplies can be used within the scope of the invention.
- the second pump system is independent of the paint drive system although the two pumps 100, 200 do share the same oil reservoir 117 oil cooler 115 and charge pump 108.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Steering Mechanism (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Steering Controls (AREA)
- Road Repair (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN3725DEN2015 IN2015DN03725A (en) | 2012-10-17 | 2013-10-17 | |
AU2013332262A AU2013332262B2 (en) | 2012-10-17 | 2013-10-17 | Vehicle for line marking |
CN201380059939.9A CN105026652B (en) | 2012-10-17 | 2013-10-17 | Line-marking vehicle |
US14/436,656 US10000230B2 (en) | 2012-10-17 | 2013-10-17 | Vehicle for line marking |
EP13846614.9A EP2920368B1 (en) | 2012-10-17 | 2013-10-17 | Vehicle for line marking |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012904545A AU2012904545A0 (en) | 2012-10-17 | Line marking apparatus | |
AU2012904545 | 2012-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014059480A1 true WO2014059480A1 (en) | 2014-04-24 |
Family
ID=50487341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2013/001203 WO2014059480A1 (en) | 2012-10-17 | 2013-10-17 | Vehicle for line marking |
Country Status (6)
Country | Link |
---|---|
US (1) | US10000230B2 (en) |
EP (1) | EP2920368B1 (en) |
CN (1) | CN105026652B (en) |
AU (1) | AU2013332262B2 (en) |
IN (1) | IN2015DN03725A (en) |
WO (1) | WO2014059480A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111851241A (en) * | 2020-07-21 | 2020-10-30 | 康圣泉 | Asphalt road painting equipment for road construction |
KR20200129553A (en) * | 2019-05-09 | 2020-11-18 | 주식회사 하스라인기계 | Lane removal apparatus |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013170047A1 (en) * | 2012-05-10 | 2013-11-14 | Graco Minnesota Inc. | Control system for self-propelled line striper |
US9840143B1 (en) * | 2015-05-20 | 2017-12-12 | Hydro-Gear Limited Partnership | Cooling pump assembly and cooling system for utility vehicle |
US10358040B1 (en) | 2015-06-01 | 2019-07-23 | Hydro-Gear Limited Partnership | Drive assembly and system for utility vehicle |
CN105369727B (en) * | 2015-12-05 | 2017-11-10 | 芜湖山野电器有限公司 | A kind of line-marking vehicle for battery truck parking stall |
CA3020866A1 (en) * | 2016-04-15 | 2017-10-19 | Joy Global Underground Mining Llc | Systems and methods for tensioning a conveyor in a mining system |
CN105903174B (en) * | 2016-06-09 | 2017-12-08 | 重庆市木越机械制造有限公司 | Court chalker |
CN106996073A (en) * | 2016-09-23 | 2017-08-01 | 广州市科卡通信科技有限公司 | A kind of town road chalker |
CN106996074A (en) * | 2016-09-23 | 2017-08-01 | 广州市科卡通信科技有限公司 | A kind of new town road chalker |
CN107724223A (en) * | 2017-11-14 | 2018-02-23 | 王文虎 | A kind of road surface pattern spray drawing machine |
CN108516057B (en) * | 2018-05-28 | 2023-09-01 | 芜湖恒安钢结构有限公司 | Co-directional lane dividing line marking device for large-scale transport ship |
US10828656B2 (en) | 2018-07-27 | 2020-11-10 | Avant-Garde Ip Llc | Height and rotational adjustment system for one or more spray guns used in a line striper |
US11148161B2 (en) * | 2018-07-27 | 2021-10-19 | Avant-Garde Ip Llc | Height adjustment system for one or more spray guns used in a line striper |
FR3088055B1 (en) * | 2018-11-07 | 2022-05-06 | Hublex | TRANSPORT VEHICLE |
CN111249718B (en) * | 2020-03-17 | 2021-06-15 | 江西制造职业技术学院 | Finish line rapid marking equipment for track and field events |
CN112354168B (en) * | 2020-12-04 | 2022-07-08 | 哈尔滨体育学院 | Track and field runway line drawing machine |
CN112502015B (en) * | 2020-12-29 | 2022-03-29 | 山东交通学院 | Unmanned automatic marking vehicle for highway |
CN115509122B (en) * | 2022-11-21 | 2023-03-21 | 山东高速集团有限公司创新研究院 | Online optimization control method and system for unmanned line marking vehicle based on machine vision navigation |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB783187A (en) * | 1954-11-01 | 1957-09-18 | William Duchatel Woellwarth | Improvements in or relating to devices for marking indicator lines on road surfaces |
EP0008305A1 (en) * | 1978-08-09 | 1980-03-05 | Bayerische Motoren Werke Aktiengesellschaft | Variable ratio steering gear for motor vehicles |
FR2649452A1 (en) * | 1989-07-07 | 1991-01-11 | Prosign Sa | Machine for applying road marking strips to roads and similar surfaces |
US7159903B2 (en) * | 2003-06-27 | 2007-01-09 | Chen-Chang Huang | Steering mechanism for power cycle |
US7237629B1 (en) | 2003-10-15 | 2007-07-03 | Gizmow Llc | Zero-turn radius vehicle with steerable front wheels |
US7690685B2 (en) * | 2006-06-12 | 2010-04-06 | Honda Motor Co., Ltd. | Vehicle steering mechanism |
CN201963618U (en) * | 2011-01-28 | 2011-09-07 | 三一重工股份有限公司 | Travel drive system of hydrostatic drive machines |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2727581A (en) * | 1953-01-26 | 1955-12-20 | Laurel H Wright | Tandem hitch |
US3064745A (en) * | 1960-01-18 | 1962-11-20 | Peters Company | Powered dirigible wheel unit |
US3163253A (en) * | 1960-06-09 | 1964-12-29 | Raymond Corp | Materials handling truck |
US4367881A (en) * | 1980-10-01 | 1983-01-11 | Outboard Marine Corporation | Vehicle steering system |
US4892251A (en) * | 1988-11-14 | 1990-01-09 | Harrison Bresnen | Line marking device |
JPH082431A (en) * | 1994-06-21 | 1996-01-09 | Chuo Spring Co Ltd | Automobile power steering device |
US5579863A (en) * | 1995-04-10 | 1996-12-03 | Caterpillar Inc. | Steering system for an articulated machine |
JP4433522B2 (en) * | 1999-08-30 | 2010-03-17 | マツダ株式会社 | Vehicle steering structure |
CA2336496A1 (en) * | 2000-03-21 | 2001-09-21 | Rohm And Haas Company | Road-marking machine |
US6349966B1 (en) * | 2000-06-02 | 2002-02-26 | Daimlerchrysler Corporation | Steering column assembly |
CN200946242Y (en) * | 2006-09-25 | 2007-09-12 | 河南省公路附属设施有限公司 | Self-walking type road striping machine |
CN100587162C (en) * | 2007-04-29 | 2010-02-03 | 河南天途路业有限公司 | Water-based and normal temperature road marking machine |
US7735845B2 (en) * | 2008-08-01 | 2010-06-15 | Snow Robert W | Rear steer lawn mowing vehicle with front steering means |
CN101560750B (en) * | 2009-05-08 | 2011-03-02 | 河南天途路业有限公司 | Ride-type hot melt marking machine |
CN202116970U (en) * | 2011-06-14 | 2012-01-18 | 河南天途路业有限公司 | Ride-type hot melting spraying marking machine |
AU2011372848B2 (en) * | 2011-07-12 | 2015-01-29 | Husqvarna Ab | Lawn care vehicle with rear wheel steering assembly |
US9167741B2 (en) * | 2011-07-12 | 2015-10-27 | Husqvarna Ab | Lawn care vehicle with rear wheel axle assembly |
DE102011112079B4 (en) * | 2011-09-01 | 2014-02-06 | Audi Ag | Steering wheel arrangement for a motor vehicle |
CN104691602B (en) * | 2013-12-04 | 2017-02-15 | 北汽福田汽车股份有限公司 | Separation type steering mechanism |
US9315197B1 (en) * | 2014-09-30 | 2016-04-19 | Continental Automotive Systems, Inc. | Hands accelerating control system |
US9845106B2 (en) * | 2015-08-31 | 2017-12-19 | Steering Solutions Ip Holding Corporation | Overload protection for belt drive mechanism |
-
2013
- 2013-10-17 AU AU2013332262A patent/AU2013332262B2/en active Active
- 2013-10-17 IN IN3725DEN2015 patent/IN2015DN03725A/en unknown
- 2013-10-17 US US14/436,656 patent/US10000230B2/en active Active
- 2013-10-17 EP EP13846614.9A patent/EP2920368B1/en active Active
- 2013-10-17 WO PCT/AU2013/001203 patent/WO2014059480A1/en active Application Filing
- 2013-10-17 CN CN201380059939.9A patent/CN105026652B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB783187A (en) * | 1954-11-01 | 1957-09-18 | William Duchatel Woellwarth | Improvements in or relating to devices for marking indicator lines on road surfaces |
EP0008305A1 (en) * | 1978-08-09 | 1980-03-05 | Bayerische Motoren Werke Aktiengesellschaft | Variable ratio steering gear for motor vehicles |
FR2649452A1 (en) * | 1989-07-07 | 1991-01-11 | Prosign Sa | Machine for applying road marking strips to roads and similar surfaces |
US7159903B2 (en) * | 2003-06-27 | 2007-01-09 | Chen-Chang Huang | Steering mechanism for power cycle |
US7237629B1 (en) | 2003-10-15 | 2007-07-03 | Gizmow Llc | Zero-turn radius vehicle with steerable front wheels |
US7690685B2 (en) * | 2006-06-12 | 2010-04-06 | Honda Motor Co., Ltd. | Vehicle steering mechanism |
CN201963618U (en) * | 2011-01-28 | 2011-09-07 | 三一重工股份有限公司 | Travel drive system of hydrostatic drive machines |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200129553A (en) * | 2019-05-09 | 2020-11-18 | 주식회사 하스라인기계 | Lane removal apparatus |
KR102194219B1 (en) * | 2019-05-09 | 2020-12-23 | 주식회사 하스라인기계 | Lane removal apparatus |
CN111851241A (en) * | 2020-07-21 | 2020-10-30 | 康圣泉 | Asphalt road painting equipment for road construction |
CN111851241B (en) * | 2020-07-21 | 2022-01-18 | 安徽正森建筑工程有限公司 | Asphalt road painting equipment for road construction |
Also Published As
Publication number | Publication date |
---|---|
AU2013332262A1 (en) | 2015-05-28 |
EP2920368B1 (en) | 2018-02-07 |
US10000230B2 (en) | 2018-06-19 |
US20150275445A1 (en) | 2015-10-01 |
IN2015DN03725A (en) | 2015-09-18 |
EP2920368A4 (en) | 2016-08-31 |
CN105026652A (en) | 2015-11-04 |
CN105026652B (en) | 2018-02-09 |
AU2013332262B2 (en) | 2017-08-03 |
EP2920368A1 (en) | 2015-09-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10000230B2 (en) | Vehicle for line marking | |
US10563364B2 (en) | Control system for self-propelled line striper | |
EP2847385B1 (en) | Electro-hydraulic actuated spray guns | |
US8240408B2 (en) | Adaptable vehicle having interchangeable tracks and wheels | |
CN104210540B (en) | Windrower autoguidance hydraulic steering interface | |
US11761157B2 (en) | Self-propelled construction machine | |
EP3660216B1 (en) | Electric driver for wheeled ground surface modifying machine | |
CA2610140A1 (en) | Ztr mechanical steering assembly and method of steering | |
CN215222929U (en) | Two-wheel-drive mini-tiller | |
US20160212938A1 (en) | Edging tools for work machines | |
JP3891951B2 (en) | Rice fertilizer application equipment | |
US10150502B2 (en) | Linkage adjustment system and vehicle incorporating same | |
CN113424667A (en) | Two-wheel-drive mini-tiller | |
JP2004243981A (en) | Traveling vehicle | |
RU2362032C1 (en) | Speed controller | |
JPS645463Y2 (en) | ||
JPH05207809A (en) | Seedling transplanter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201380059939.9 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13846614 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14436656 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013846614 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2013332262 Country of ref document: AU Date of ref document: 20131017 Kind code of ref document: A |