AU2016418574A1 - Spray gun for a high-pressure cleaning device - Google Patents
Spray gun for a high-pressure cleaning device Download PDFInfo
- Publication number
- AU2016418574A1 AU2016418574A1 AU2016418574A AU2016418574A AU2016418574A1 AU 2016418574 A1 AU2016418574 A1 AU 2016418574A1 AU 2016418574 A AU2016418574 A AU 2016418574A AU 2016418574 A AU2016418574 A AU 2016418574A AU 2016418574 A1 AU2016418574 A1 AU 2016418574A1
- Authority
- AU
- Australia
- Prior art keywords
- thrust
- axis
- spray gun
- guide
- gun according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007921 spray Substances 0.000 title claims abstract description 63
- 238000004140 cleaning Methods 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 85
- 238000001514 detection method Methods 0.000 claims description 23
- 230000001419 dependent effect Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 210000003811 finger Anatomy 0.000 description 2
- 210000005224 forefinger Anatomy 0.000 description 2
- 210000004932 little finger Anatomy 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/01—Spray pistols, discharge devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
- B05B12/006—Pressure or flow rate sensors
- B05B12/008—Pressure or flow rate sensors integrated in or attached to a discharge apparatus, e.g. a spray gun
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/16—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons
- G01L7/166—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons with mechanical transmitting or indicating means
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Nozzles (AREA)
- Spray Control Apparatus (AREA)
Abstract
The invention relates to a spray gun (10) for a high-pressure cleaning device comprising a liquid inlet (38), a liquid outlet (24), a valve (26), which is positioned in the flow path between the liquid inlet (38) and the liquid outlet (24) and can be actuated by means of an actuating element, and comprising a pressure detection- and display device (68) having a thrust part (84), which can be moved along a thrust axis (94) depending on the prevailing pressure of a cleaning liquid in the flow path between the liquid inlet (38) and the liquid outlet (24), and having a display part (100), which is mechanically coupled to the thrust part (84) and which can be moved into varying positions with the help of the thrust part (84). In order to develop the spray gun (10) such that it is cost-effective to produce and has improved handling characteristics by displaying the pressure to the user in an ergonomically advantageous way, according to the invention the display part (100) can be moved along a display axis (102) with the help of the thrust part (84), the display axis (102) being angled in relation to the thrust axis (94) and defining a plane (114) together with the thrust axis (94).
Description
SPRAY GUN FORA HIGH-PRESSURE CLEANING APPLIANCE
The invention relates to a spray gun for a high-pressure cleaning appliance, with a liquid inlet for pressurised cleaning liquid, a liquid outlet for dispensing the cleaning liquid, and with a valve which, for controlling the dispensing of liquid, is arranged in the path of flow between the liquid inlet and the liquid outlet and can be actuated by means of an actuating element, and with a pressure detection and indication device which has a thrust part which is displaceable along a thrust axis dependent on a pressure of the cleaning liquid prevailing in the path of flow between the liquid inlet and the liquid outlet, and an indicating part coupled mechanically with the thrust part, which indicating part can be moved into different positions with the aid of the thrust part.
The dispensing of liquid which has been pressurised by a high-pressure cleaning appliance can be controlled with the aid of such spray guns. For example, a pressure hose can be connected to the liquid inlet, via which hose cleaning liquid pressurised by the high-pressure cleaning appliance can be supplied to the spray gun, and for example a spray lance and/or a spray nozzle can be connected to the liquid outlet, via which lance and/or nozzle the liquid can be directed onto an object to be cleaned. To control the dispensing of liquid, the user can actuate the valve with the aid of an actuating element, so that the flow connection between the liquid inlet and the liquid outlet can be unblocked and interrupted as desired. In order to detect and indicate a pressure of the cleaning liquid prevailing in the path of flow between the liquid inlet and the liquid outlet, such spray guns have a pressure detection and indication device, so that the pressure of the cleaning liquid can be indicated to the user.
A spray gun is known from WO 2016/066344 Al in which an electric apparatus which is supplied with electric power by a battery is used for indicating the
11029628_1 (GHMatters) P110533.AU
- 2 pressure. The production and assembly of the electric apparatus involves not inconsiderable costs.
A spray gun in which a mechanical pressure detection and indication device is used which can be screwed onto a tube piece and has a piston oriented flush with the tube piece which can be acted on by the pressure of the cleaning liquid and can be displaced coaxially to the longitudinal piston axis counter to an elastic restoring force is known from DE 94 00 583 Ul. The piston is coupled mechanically with an indicating element which can be turned with the aid of the piston about an axis of rotation oriented coaxially to the longitudinal piston axis. Dependent on the pressure acting on the piston, the indicating element assumes a particular rotary position. The user can thus read off the pressure of the cleaning liquid from the indicating element. The orientation of the axis of rotation of the indicating element coaxially to the longitudinal piston axis and hence also coaxially to the longitudinal axis of the tube piece frequently makes it difficult to handle the spray gun, since the user in many cases has to change the orientation of the spray gun in order to be able to read off the pressure of the cleaning liquid from the indicating element unequivocally.
It is an object of the present invention to refine a spray gun of the type referred to first hereinbefore such that it can be produced inexpensively and has improved handling, in that the pressure of the cleaning liquid can be indicated to the user in an ergonomically beneficial manner.
This object is achieved according to the invention in a spray gun of the type referred to first hereinbefore in that the indicating part is linearly movable with the aid of the thrust part along an indication axis which is inclined relative to the thrust axis and together with the thrust axis defines a plane.
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- 3 In the spray gun according to the invention, a mechanical pressure detection and indication device is used. A thrust part of the pressure detection and indication device is linearly movable along a thrust axis dependent on the pressure of the cleaning liquid. The thrust part is mechanically coupled with an indicating part which is linearly movable along an indication axis with the aid of the thrust part. The indication axis is inclined relative to the thrust axis and together with the thrust axis defines a plane. The indicating part is moved along the indication axis with the aid of the thrust part dependent on the pressure of the cleaning liquid, the direction of movement of the indicating part running obliquely or perpendicularly to the direction of movement of the thrust part.
The provision of a thrust part which is linearly movable along a thrust axis dependent on the pressure of the cleaning liquid, and of an indicating part which can be moved with the aid of the thrust part along an indication axis inclined relative to the thrust axis, firstly provides the possibility of orienting the thrust axis within a gun housing of the spray gun such that with the aid of the thrust part the pressure of the cleaning liquid can be detected in a structurally simple manner even in constricted installation conditions. Secondly, the indication axis can be oriented such that the position of the indicating part which is movable along the indication axis can be read off by the user in an ergonomically beneficial manner, without it being necessary for the user to change the orientation of the spray gun during its use.
The pressure detection and indication device may be arranged in a gun housing of the spray gun, the movement region of the indicating part being covered by a transparent covering. The user can read off the position of the indicating part through the transparent covering.
It is advantageous if the transparent covering bears on its upper side and/or on its underside gradations and/or symbols which give the user an indication
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- 4 as to which cleaning objects can be optimally cleaned in each case if the indicating part assumes a position which corresponds to the respective symbol. Thus a rather low pressure of the cleaning liquid should be selected for sensitive cleaning objects, whereas a greater pressure for the cleaning liquid can be selected for very robust cleaning objects. Depending on the prevailing pressure, the indicating part assumes a particular position, and using the symbol corresponding to the respective position the user can recognise for which cleaning objects the current pressure is optimally suitable.
The angle of inclination between the thrust axis and the indication axis is beneficially at least 10°. In particular, provision may be made for the angle of inclination between the thrust axis and the indication axis to be approximately 20° to approximately 70°. An orientation of the indication axis at an angle of approximately 40° to approximately 50°, in particular 45°, to the thrust axis has proved particularly advantageous.
It is beneficial if the thrust part is connected to the indicating part by means of gear elements, with a linear movement of the thrust part along the thrust axis being able to be converted into a linear movement of the indicating part along the indication axis with the aid of the gear elements.
In one advantageous configuration of the invention, the indicating part assumes an increasing distance from the thrust axis with increasing pressure load of the thrust part. Alternatively, provision may be made for the indicating part to approach the thrust axis with increasing pressure load of the thrust part.
It is particularly advantageous if the movement of the indicating part relative to the thrust axis is directed counter to the movement of the thrust part. Thus for example provision may be made for the thrust part with increasing pressure load to assume an increasing distance from the liquid outlet of the
11029628_1 (GHMatters) P110533.AU
- 5 spray gun, and for the distance which the indicating part assumes from the liquid outlet to be reduced with increasing pressure load of the thrust part. The greater the pressure load, the closer the indicating part approaches to the liquid outlet.
In one advantageous configuration of the invention, the spray gun has a handle which can be encompassed by the hand of the user, the handle having an upper end region associated with the thumb and forefinger of the user and a lower end region associated with the little finger of the user, and the indicating part being arranged above the upper end region of the handle on a rear side of the spray gun.
It is beneficial if the indicating part assumes an increasing distance from the upper end region of the handle with increasing pressure load of the thrust part. The greater the pressure load, the more the indicating part in such a configuration of the invention moves away from the upper end region of the handle. The indicating part thus moves further and further upwards with increasing pressure load, and this intuitively signals to the user that the pressure of the cleaning liquid is increasing.
In one advantageous configuration of the invention, the thrust part is connected to the indicating part by means of a slotted guide arrangement. The slotted guide arrangement makes it possible, in a structurally simple manner, to convert a linear movement of the thrust part into a linear movement of the indicating part.
Preferably the slotted guide arrangement has at least one pivot arm which is mounted on the indicating part pivotably about a pivot axis and with which a thrust element rigidly connected to the thrust part is associated, which element projects into an elongate guide cutout, associated with the thrust element, of the pivot arm, the pivot arm being pivotable about the pivot axis
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- 6 with the aid of the thrust element and the indicating part being displaceable along the indication axis with the aid of the pivot arm. The thrust part is coupled mechanically with the indicating part by means of the at least one pivot arm. If the thrust part moves along the thrust axis, the thrust part, via the thrust element, can exert a force on the pivot arm, under the action of which the pivot arm displaces the indicating part along the indication axis.
Preferably, the guide cutout associated with the thrust element is configured to be arcuate, in particular circular-arc-shaped. The arcuate configuration of the guide cutout into which the associated thrust element projects makes it possible in a structurally simple manner to move the indicating part linearly along the indication axis.
Advantageously, the pivot axis of the at least one pivot arm is oriented perpendicularly to the plane defined by the thrust axis and the indication axis.
The thrust element is preferably formed as a thrust pin, in particular as a thrust pin oriented perpendicularly to the thrust axis.
The thrust pin is preferably configured to be cylindrical.
Advantageously, the thrust pin is connected in one piece with the thrust part.
Provision may be made for the thrust pin and the thrust part jointly to form a one-part shaped plastics part.
The thrust element in one advantageous embodiment of the invention penetrates through the guide cutout of the pivot arm which is associated with it.
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- 7 In one particularly advantageous configuration of the invention, the spray gun has a gun housing, and a guide element held in stationary manner in the gun housing is associated with the at least one pivot arm, which element projects into an elongate guide cutout, associated with the guide element, of the pivot arm.
The guide cutout associated with the guide element is preferably configured to be arcuate, in particular circular-arc-shaped.
The guide element is beneficially configured as a guide pin.
In particular, provision may be made for the guide pin to be formed to be cylindrical.
Preferably, the guide pin is oriented perpendicularly to the plane defined by the thrust axis and the indication axis.
Provision may be made for the guide element to penetrate through the guide cutout associated therewith.
It is particularly advantageous if the at least one pivot arm has an elongate, in particular arcuate, guide cutout which is associated both with a thrust element and a guide element, the associated thrust element and the associated guide element projecting into the arcuate cutout.
Alternatively, provision may be made for the at least one pivot arm to have two elongate, in particular arcuate, guide cutouts, a first guide cutout being associated with a thrust element and a second guide cutout being associated with a guide element. The two guide cutouts may be arranged one behind the other or offset relative to one another, for example they may extend along a common arc.
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- 8 In one advantageous embodiment of the invention, the slotted guide arrangement has two pivot arms which are formed identically and have in each case an elongate, in particular arcuate, guide cutout, into which a thrust element connected rigidly to the thrust part projects and which are mounted rotatably about a common axis of rotation on the indicating part. The two pivot arms are oriented parallel to the plane defined by the thrust axis and the indication axis, this plane being arranged between the two pivot arms. The two thrust elements are oriented flush with each other and protrude from the thrust part on opposing sides.
Preferably, the slotted guide arrangement has two guide elements oriented flush with each other and held in stationary manner in the gun housing, which project in each case into an elongate, in particular arcuate, cutout in a pivot arm.
It is particularly advantageous if the slotted guide arrangement is configured mirror-symmetrically to the plane defined by the pivot axis and the indication axis.
In one advantageous configuration of the invention, the pressure detection and indication device has a supporting arrangement on which the thrust part and the indicating part are held so as to be linearly movable.
Advantageously, the supporting arrangement comprises a first linear guide in which the thrust part is mounted displaceably counter to the action of a resilient restoring force. The first linear guide guides the thrust part along the thrust axis.
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- 9 It is advantageous if the first linear guide is configured as a slotted guide sleeve. The guide sleeve can receive the thrust part and guide it along the thrust axis, the thrust axis forming the longitudinal axis of the guide sleeve.
Beneficially, a restoring spring is arranged in the guide sleeve, which spring acts upon the thrust part with a resilient restoring force when under pressure load.
In one advantageous configuration of the invention, the thrust part is connected rigidly to a measuring member which can be acted upon by a pressure of the cleaning liquid prevailing in the path of flow between the liquid inlet and the liquid outlet.
The measuring member may for example be in the form of a measuring rod. The measuring rod may be rigidly connected to the thrust part, and the end face of the measuring rod which is remote from the thrust part can be able to be acted upon with the pressure of the cleaning liquid.
The supporting arrangement of the pressure detection and indication device in one advantageous configuration of the invention has a second linear guide, in which or on which the indicating part is displaceably mounted.
It is advantageous if the second linear guide is formed as a guide plate.
Preferably, the indicating part is held on the guide plate so as to be linearly displaceable.
The guide plate is preferably oriented perpendicularly to the plane defined by the thrust axis and the indication axis.
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- 10 It is advantageous if the indicating part forms a sliding member which encompasses at least one edge region of the second linear guide. Due to the encompassing of an edge region of the second linear guide, it can be ensured in a structurally simple manner that the sliding member does not unintentionally lift off from the second linear guide when moving along the second linear guide.
The supporting arrangement of the pressure detection and indication device in a preferred configuration of the invention has a supporting structure arranged between the thrust part and the indicating part, which structure extends in the plane defined by the thrust axis and the indication axis.
The supporting structure may for example be configured in plate form.
It is advantageous if the at least one guide element of the slotted guide arrangement is fixed on the supporting structure.
In particular, provision may be made for the at least one guide element and the supporting structure to be connected together in one piece. Thus for example provision may be made for the supporting structure and the at least one guide element jointly to form a one-part shaped plastics part, on which the first linear guide and the second linear guide are fixed.
Beneficially, the supporting structure is rigidly connected to the first linear guide and to the second linear guide.
It is advantageous if the supporting structure together with the first linear guide and the second linear guide forms a one-part shaped plastics part.
As mentioned at the beginning, the valve arranged in the path of flow between the liquid inlet and the liquid outlet can be actuated by means of an actuating
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- 11 element. It is beneficial if the actuating element is configured as a manual lever which is mounted pivotably about a lever axis, the lever axis being oriented perpendicularly to the plane defined by the thrust axis and the indication axis.
The valve of the spray gun, in one advantageous configuration of the invention, has a valve housing with a through-duct which extends from a valve inlet to a valve outlet, furthermore the valve beneficially has a closing member which is coupled with the actuating element and which in a closed position lies in liquid-tight manner against a valve seat and is movable by means of the actuating element into an open position which is spaced apart from the valve seat, it being possible for the pressure of the cleaning liquid prevailing in the through-duct downstream from the valve seat to be detected and indicated by means of the pressure detection and indication device.
The following description of an advantageous embodiment of the invention serves to explain it in greater detail in conjunction with the drawings. These show:
Figure 1: a schematic longitudinal sectional view of a spray gun;
Figure 2: a side view of a pressure detection and indication device of the spray gun of Figure 1, wherein a thrust part and an indicating part of the pressure detection and indication device assume a first end position;
Figure 3: a side view corresponding to Figure 2, wherein the thrust part and the indicating part assume a middle position;
Figure 4: a side view corresponding to Figure 2, wherein the thrust part and the indicating part assume a second end position;
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- 12 Figure 5: a view of the pressure detection and indication device in the direction of arrow A in Figure 2;
Figure 6: a sectional view of the pressure detection and indication device along the line 6-6 in Figure 5.
In the drawings, an advantageous embodiment of a spray gun according to the invention, which is assigned overall the reference numeral 10, is illustrated schematically. The spray gun 10 comprises a gun housing 12, which is formed by a first housing half-shell 14 and a second housing half-shell, not shown in the drawings. The gun housing 12 has a central housing region 16, which is arranged between a front housing region 18 and a rear housing region 20. The front housing region 18 receives an outlet line 22, which forms a liquid outlet 24 of the spray gun 10 with its free end remote from the central housing region 16. For example a spray nozzle or a spray lance may be connected to the liquid outlet.
The central housing region 16 receives a valve 26 with a valve housing 28, which has a valve inlet 30 and a valve outlet 32 and also a through-duct 34, which extends from the valve inlet 30 to the valve outlet 32 and in which a closing member 36 is held displaceably. To the valve outlet 32 there is connected the outlet line 22, and the valve inlet 30 forms a liquid inlet 38 of the spray gun 10, to which a pressure hose can be connected in a manner which is known per se to the person skilled in the art, which hose is in a flow connection with a pressure outlet of a high-pressure cleaning appliance. Via the pressure hose, the spray gun 10 can be provided with cleaning liquid, preferably water, which has been pressurised by the high-pressure cleaning appliance, and the cleaning liquid can be discharged via the outlet line 22.
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- 13 The rear housing region 20 forms a handle 40 which protrudes from the central housing region 16 and which can be encompassed by the hand of the user. The handle 40 has an upper grip region 42 which is associated with the thumb and forefinger of the user and directly adjoins the central housing region 16, and a lower grip region 44 which is associated with the little finger of the user. The lower grip region 44 is adjoined by a protective guard 46 which extends as far as the central housing region 16. The protective guard 46, the central housing region 16 and the handle 40 surround a grip opening 48 in which the fingers of the user can engage when encompassing the handle 40.
The valve housing 28 has an extension arm 50, on which a manual lever 52 is mounted pivotably about a lever axis 54. The manual lever 52 extends along the front side of the handle 40 which faces the protective guard 46 as far as the lower grip region 44. The manual lever 52 can be pivoted about the lever axis 54 by the user, in that the user encompasses the handle 40 together with the manual lever 52 with his fingers. By pivoting the manual lever 52, the closing member 36 can be pivoted, starting from a closed position illustrated in Figure 1, in which the closing member 36 lies in liquid-tight manner against a valve seat 56, in the direction of the valve inlet 30 into an open position spaced apart from the valve seat 56. If the user releases the manual lever 52, the closing member 36 returns to its closed position under the action of a valve spring 58. To this end, the force of the valve spring 58 is transmitted to the closing member 36 via a valve tappet 60. In the closed position, the closing member 36 interrupts the flow connection from the liquid inlet 38 to the liquid outlet, and in the open position the closing member 36 unblocks the flow connection between the liquid inlet 38 and the liquid outlet 24.
On the rear side 62 of the extension arm 50 remote from the valve outlet 32, the valve housing 28 has a receiving sleeve 64. A measuring duct 66 extends from the receiving sleeve 64 up to the through-duct 34, the measuring duct
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- 14 66 opening into the through-duct 64 in a region downstream from the valve seat 56.
In addition to the valve 26, the central housing region 16 receives a pressure detection and indication device 68 which is arranged between the valve 26 and a rear side 70 of the gun housing 12 which is remote from the liquid outlet 24. The pressure detection and indication device 68 is shown enlarged in Figures 2 to 6. It has a first linear guide in the form of a guide sleeve 72, which projects with an extension 74 into the receiving sleeve 64. The extension 74 is held detachably in the receiving sleeve 64 with the aid of clamping pins 76, 78.
On the side remote from the extension 74, the guide sleeve 72 is closed by means of a plug 80. On two diametrically opposing long sides, the guide sleeve 72 has in each case a longitudinal slot 82 or 83.
The guide sleeve 72 receives a thrust part 84 formed in the manner of a piston, and also a restoring spring 86 which is supported on one hand on the plug 80 and on the other hand on the thrust part 84.
The thrust part 84 is connected in one piece to a measuring member which in the embodiment illustrated is configured in the form of a measuring rod 88.
The measuring rod passes through the extension 74 and projects into the measuring duct 66, so that its end face 90 remote from the thrust part 84 is acted upon by the pressure of the cleaning liquid which prevails in the through-duct 34 downstream from the valve seat 56. Within the receiving sleeve 64, the measuring rod 88 is surrounded by an O-ring 92 which ensures that cleaning liquid cannot flow out of the valve 26 via the measuring duct 66.
The pressure of the cleaning liquid which acts on the end face 90 of the measuring rod 88 is transmitted to the thrust part 84 via the measuring rod 88. Under the action of the pressure of the cleaning liquid, the thrust part 84
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- 15 can be displaced in the guide sleeve 72 along a thrust axis 94 counter to the resilient restoring force of the restoring spring 86. The thrust axis 94 is identical to the longitudinal axis of the guide sleeve 72 and oriented coaxially to the longitudinal axis of the measuring rod 88.
On the upper side of the guide sleeve 72 remote from the manual lever 52 there is formed-on a supporting structure which in the example of embodiment illustrated is configured as a supporting plate 96. By means of the supporting plate 96, the guide sleeve 72 is connected in one piece with a second linear guide which in the embodiment illustrated is configured as a guide plate 98. On the guide plate 98, an indicating part 100 is mounted displaceably along an indication axis 102. The indication axis 102 is inclined relative to the thrust axis 94. In the example of embodiment illustrated, the angle of inclination a between the thrust axis 94 and the indication axis 102 is approximately 45°.
The indicating part 100 in the embodiment illustrated forms a sliding member 104 which encompasses a first long edge 108 of the guide plate 98 with a first guide shoe 106, and which encompasses a second long edge 112 of the guide plate 98 with a second guide shoe 110. The second long edge 112 is oriented parallel to the first long edge 108. This becomes clear from Figure 5.
The thrust axis 94 together with the indication axis 102 defines a centre plane 114 of the pressure detection and indication device 68. The centre plane 114 is identical to the centre plane of the gun housing 12, at which the two housing half-shells lie against each other. The pressure detection and indication device 68 is configured mirror-symmetrically to the centre plane 114.
For mechanically coupling the thrust part 84 to the indicating part 100, the pressure detection and indication device 68 has a first pivot arm 116 and a
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- 16 second pivot arm 118, which are mounted on the sliding member 104 to be pivotable about a common pivot axis 120. The two pivot arms 116, 118 have in each case an elongate, circular-arc-shaped guide cutout 122, which is configured in the manner of an elongate hole. The guide cutout 122 extends over at least one quarter of the total length of the respective pivot arm 116, 118. In the example of embodiment illustrated, the guide cutout 122 extends over more than half the total length of the pivot arms 116, 118.
The guide cutout 122 of the first pivot arm 116 is penetrated by a first thrust element, which in the embodiment illustrated is configured as a first thrust pin 124, and the guide cutout 122 of the second pivot arm 118 is penetrated by a second thrust element which in the example of embodiment illustrated is configured as a second thrust pin 126. The two thrust pins 124, 126 are connected in one piece with the thrust part 84, oriented flush with each other and in each case extend through a longitudinal slot 82 or 83 respectively of the guide sleeve 72. The thrust pins 124, 126 are oriented perpendicularly to the centre plane 114, which is defined by the thrust axis 94 and the indication axis 102.
If the thrust part 84 is acted upon by the pressure of the cleaning liquid via the measuring rod 88, it moves along the thrust axis 94, the two thrust pins 124, 126 sliding along the guide cutout 122 of the pivot arm 116, 118 which is associated in each case.
The guide cutout 122 of the first pivot arm 116 is not only penetrated by the first thrust pin 124 but additionally by a first guide element which is connected rigidly to the supporting plate 96 and in the example of embodiment illustrated is configured as a first guide pin 128. Correspondingly, the guide cutout 122 of the second pivot arm 118 is penetrated not only by the second thrust pin 126 but additionally by a guide element connected rigidly to the supporting plate 96, which element in the example of embodiment illustrated
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- 17 is configured as a second guide pin 130. The two guide pins 128, 130 are arranged on opposing sides of the supporting plate 96, oriented flush with each other and perpendicularly to the centre plane 114.
If the thrust part 94 moves along the thrust axis 94 under the influence of the pressure of the cleaning liquid, the two pivot arms 116, 118 in each case execute a pivoting movement about the pivot axis 120, moving the indicating part 100 which is configured as a sliding member 104 along the indication axis 102. In Figure 2, the thrust part 84 and the indicating part 100 are illustrated in an end position which they assume at a minimum pressure of the cleaning liquid. In Figure 3, the thrust part 84 and the indicating part 100 are illustrated in a middle position which they assume if the pressure of the cleaning liquid is 50% of the maximum pressure. In Figure 4, the thrust part 84 and the indicating part 100 are illustrated in a second end position which they assume if the pressure of the cleaning liquid assumes its maximum value.
As can be seen from Figures 2, 3 and 4, the two pivot arms 116, 118, due to the force of the thrust pins 124, 126 which acts on them, move starting from the first end position of the indicating part 100 initially in the direction of the guide pins 128, 130 until the indicating part 100 assumes the middle position, and upon the further movement of the indicating part 100 into the second end position the pivot arms 116, 118 move away from the guide pins 128, 130 again, the pivot arms 116, 118 at the same time performing a pivoting movement about the pivot axis 120.
The indicating part 100 assumes an increasing distance from the thrust axis 94 with increasing pressure load of the thrust part 84. Relative to the thrust axis 94, the movement of the indicating part 100 is directed counter to the movement of the thrust part 84. If the thrust part 84 moves rearwards in the direction remote from the liquid outlet 24, then the indicating part 100 moves obliquely forwards and upwards in the direction remote from the handle 40. At
11029628_1 (GHMatters) P110533.AU
- 18 minimum pressure load, the indicating part 100 thus assumes a position which is only a short distance from the upper grip region 42. With increasing pressure load of the thrust part 84, the indicating part 100 assumes an increasingly higher position relative to the upper grip region 42.
Using the position of the indicating part 100, the user can in a simple manner recognise the pressure of the cleaning liquid prevailing in the through-duct 34 of the valve 26 downstream from the valve seat 56. In order to free the view of the indicating part 100 arranged within the gun housing 12 for the user, the gun housing 12 has on the rear side 70 above the handle 40 a housing opening 132 which is closed in liquid-tight manner with the aid of a transparent covering element 134, the transparent covering element 134 covering the guide plate 98 and the indicating part 100. On the transparent covering element 134 a pressure scale may be arranged and/or individual regions may be provided with different symbols which give the user an indication as to which cleaning objects can be optimally cleaned in each case if the indicating part 100 assumes a position which corresponds to the respective symbol.
The guide sleeve 72, together with the supporting plate 96 and the guide plate 98, forms a one-part supporting arrangement 136 of the pressure detection and indication device 68. The supporting arrangement 136 is beneficially configured as a one-part shaped plastics part.
The pivot arms 116, 118 in combination with the thrust pins 124, 126 and the guide pins 128, 130 form gear elements in the form of a slotted guide arrangement 138, by means of which elements the thrust part 84 is coupled mechanically with the indicating part 100.
Claims (28)
1. Spray gun for a high-pressure cleaning appliance, with a liquid inlet (38) for pressurised cleaning liquid, a liquid outlet (24) for dispensing the cleaning liquid, and with a valve (26) which, for controlling the dispensing of liquid, is arranged in the path of flow between the liquid inlet (38) and the liquid outlet (24) and can be actuated by means of an actuating element, and with a pressure detection and indication device (68) which has a thrust part (84) which is displaceable along a thrust axis (94) dependent on a pressure of the cleaning liquid prevailing in the path of flow between the liquid inlet (38) and the liquid outlet (24), and an indicating part (100) coupled mechanically with the thrust part (84), which indicating part can be moved into different positions with the aid of the thrust part (84), characterised in that the indicating part (100) is linearly movable with the aid of the thrust part (84) along an indication axis (102) which is inclined relative to the thrust axis (94) and together with the thrust axis (94) defines a plane (114).
2. Spray gun according to Claim 1, characterised in that the angle of inclination (a) between the thrust axis (94) and the indication axis (102) is at least 10°, in particular approximately 20° to approximately 70°.
3. Spray gun according to Claim 1 or 2, characterised in that the thrust part (84) is connected to the indicating part (100) by means of gear elements, with a linear movement of the thrust part (84) along the thrust axis (94) being able to be converted into a linear movement of the indicating part (100) along the indication axis (102).
11029628_1 (GHMatters) P110533.AU
4. Spray gun according to Claim 1, 2 or 3, characterised in that the indicating part (100) assumes an increasing distance from the thrust axis (94) with increasing pressure load of the thrust part (84).
5. Spray gun according to one of the preceding claims, characterised in that the movement of the indicating part (100) relative to the thrust axis (94) is directed counter to the movement of the thrust part (84).
6. Spray gun according to one of the preceding claims, characterised in that the thrust part (84) is connected to the indicating part (100) by means of a slotted guide arrangement (138).
7. Spray gun according to Claim 6, characterised in that the slotted guide arrangement (138) has at least one pivot arm (116, 118) which is mounted on the indicating part (100) pivotably about a pivot axis (120) and with which a thrust element rigidly connected to the thrust part (100) is associated, which element projects into an elongate guide cutout (122), associated with the thrust element, of the pivot arm (116, 118), the pivot arm (116, 118) being pivotable about the pivot axis (120) by the thrust element and the indicating part (100) being displaceable along the indication axis (102) by means of the pivot arm (116, 118).
8. Spray gun according to Claim 7, characterised in that the guide cutout (122) associated with the thrust element is configured to be arcuate.
9. Spray gun according to Claim 7 or 8, characterised in that the pivot axis (120) is oriented perpendicularly to the plane (114) defined by the thrust axis (94) and the indication axis (102).
10. Spray gun according to Claim 7, 8 or 9, characterised in that the thrust element is configured as a thrust pin (124, 126).
11029628_1 (GHMatters) P110533.AU
11. Spray gun according to Claim 10, characterised in that the thrust pin (124, 126) is oriented perpendicularly to the plane (114) defined by the thrust axis (94) and the indication axis (102).
12. Spray gun according to one of Claims 7 to 11, characterised in that the spray gun (10) has a gun housing (12), and in that a guide element held in stationary manner in the gun housing (12) is associated with the at least one pivot arm (116, 118), which element projects into an elongate guide cutout (122), associated with the guide element, of the pivot arm (116, 118).
13. Spray gun according to Claim 12, characterised in that the guide cutout (122) associated with the guide element is configured to be arcuate.
14. Spray gun according to Claim 12 or 13, characterised in that the guide element is configured as a guide pin (128, 130).
15. Spray gun according to Claim 14, characterised in that the guide pin (128, 130) is oriented perpendicularly to the plane (114) defined by the thrust axis (94) and the indication axis (102).
16. Spray gun according to one of Claims 12 to 15, characterised in that the at least one pivot arm (116, 118) has an elongate guide cutout (122) which is associated both with a thrust element and a guide element, the associated thrust element and the associated guide element projecting into the guide cutout.
17. Spray gun according to one of the preceding claims, characterised in that the pressure detection and indication device (68) has a supporting
11029628_1 (GHMatters) P110533.AU arrangement (136) on which the thrust part (84) and the indicating part (100) are held so as to be linearly movable.
18. Spray gun according to Claim 17, characterised in that the supporting arrangement (136) has a first linear guide in which or on which the thrust part (84) is mounted displaceably counter to the action of a resilient restoring force.
19. Spray gun according to Claim 18, characterised in that the first linear guide has a slotted guide sleeve (72).
20. Spray gun according to Claim 18 or 19, characterised in that the thrust part (84) is connected rigidly to a measuring member which can be acted upon by a pressure of the cleaning liquid prevailing in the path of flow between the liquid inlet (38) and the liquid outlet (24).
21. Spray gun according to Claim 20, characterised in that the measuring member is configured as a measuring rod (88).
22. Spray gun according to one of Claims 17 to 21, characterised in that the supporting arrangement (136) has a second linear guide, in which or on which the indicating part (100) is displaceably mounted.
23. Spray gun according to Claim 22, characterised in that the second linear guide has a guide plate (98).
24. Spray gun according to Claim 22 or 23, characterised in that the indicating part (100) forms a sliding member (104) which encompasses at least one edge region of the second linear guide.
11029628_1 (GHMatters) P110533.AU
25. Spray gun according to one of Claims 17 to 24, characterised in that the supporting arrangement (136) has a supporting structure arranged between the thrust part (84) and the indicating part (100), which structure extends in the plane (114) defined by the thrust axis (94) and the indication axis (102).
26. Spray gun according to Claim 25, characterised in that the supporting structure is configured as a supporting plate (96).
27. Spray gun according to one of the preceding claims, characterised in that the actuating element is configured as a manual lever (52) which is mounted pivotably about a lever axis (54), the lever axis (54) being oriented perpendicularly to the plane (114) defined by the thrust axis (94) and the indication axis (102).
28. Spray gun according to one of the preceding claims, characterised in that the valve (26) has a valve housing (28) with a through-duct (34) which extends from a valve inlet (30) to a valve outlet (32), and in that the valve (26) has a closing member (36) which is coupled with the actuating element and which in a closed position lies in liquid-tight manner against a valve seat (56) and is movable by means of the actuating element into an open position which is spaced apart from the valve seat (56), and in that the pressure of the cleaning liquid prevailing in the through-duct (34) downstream from the valve seat (56) can be detected and indicated by means of the pressure detection and indication device (68).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2016/068976 WO2018028769A1 (en) | 2016-08-09 | 2016-08-09 | Spray gun for a high-pressure cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2016418574A1 true AU2016418574A1 (en) | 2019-02-14 |
Family
ID=56618161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2016418574A Abandoned AU2016418574A1 (en) | 2016-08-09 | 2016-08-09 | Spray gun for a high-pressure cleaning device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3496867B1 (en) |
| JP (1) | JP2019529076A (en) |
| CN (1) | CN109562402B (en) |
| AU (1) | AU2016418574A1 (en) |
| WO (1) | WO2018028769A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369181B (en) * | 2019-07-12 | 2022-07-08 | 江苏苏美达五金工具有限公司 | Pressure display spray gun |
| CN211660579U (en) | 2019-11-13 | 2020-10-13 | 创科无线普通合伙 | Pressure cleaning machine |
| CN212285023U (en) * | 2019-12-06 | 2021-01-05 | 苏州宝时得电动工具有限公司 | Cleaning machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2779304A (en) * | 1954-12-02 | 1957-01-29 | Robinson Products Inc | Low pressure indicator |
| DE9400583U1 (en) * | 1994-01-14 | 1994-02-24 | Kaercher Gmbh & Co Alfred | Pressure gauges, in particular for a high-pressure cleaning device |
| DE19522786C2 (en) * | 1995-06-14 | 2002-04-04 | Innovative Technik Marketing U | display device |
| GB9913038D0 (en) * | 1999-06-05 | 1999-08-04 | Bsa Guns | Improvements in and relating to air guns |
| GB2389908B (en) * | 2002-06-18 | 2005-05-18 | Itw Ltd | Pressure gauge |
| CN201841081U (en) * | 2010-09-28 | 2011-05-25 | 潘星钢 | Spray gun with air pressure display device |
| DE102014115789A1 (en) * | 2014-10-30 | 2016-05-04 | Alfred Kärcher Gmbh & Co. Kg | Spray gun for high-pressure cleaning device |
-
2016
- 2016-08-09 JP JP2019506713A patent/JP2019529076A/en active Pending
- 2016-08-09 CN CN201680088039.0A patent/CN109562402B/en active Active
- 2016-08-09 EP EP16750163.4A patent/EP3496867B1/en active Active
- 2016-08-09 WO PCT/EP2016/068976 patent/WO2018028769A1/en unknown
- 2016-08-09 AU AU2016418574A patent/AU2016418574A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CN109562402B (en) | 2021-06-25 |
| EP3496867A1 (en) | 2019-06-19 |
| WO2018028769A1 (en) | 2018-02-15 |
| JP2019529076A (en) | 2019-10-17 |
| CN109562402A (en) | 2019-04-02 |
| EP3496867B1 (en) | 2021-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |