EP3381565A1 - Spray gun and washing apparatus - Google Patents
Spray gun and washing apparatus Download PDFInfo
- Publication number
- EP3381565A1 EP3381565A1 EP18156402.2A EP18156402A EP3381565A1 EP 3381565 A1 EP3381565 A1 EP 3381565A1 EP 18156402 A EP18156402 A EP 18156402A EP 3381565 A1 EP3381565 A1 EP 3381565A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mounting base
- pin
- spray gun
- circumferential groove
- rear mounting
- 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.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 40
- 238000005406 washing Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 240000002853 Nelumbo nucifera Species 0.000 claims description 9
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 9
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 8
- 238000005452 bending Methods 0.000 description 5
- 239000003599 detergent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
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
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/12—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
- B05B1/1627—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
- B05B1/1636—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
- B05B1/169—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets having three or more selectively effective outlets
-
- 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
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0278—Arrangement or mounting of spray heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
Definitions
- the present invention relates to washer technology and, more particularly, to a spray gun and a washing apparatus.
- a commercially-available high-pressure washer has a three-on-one flow ejector which includes a high-pressure fan-shaped nozzle, a rotating nozzle, and a low-pressure liquid sucking nozzle, allowing users to rotate the flow ejector to a corresponding angle as needed, so as to switch between the three nozzles.
- U-shaped pins which are symmetrically distributed are used to mount rotating elements axially and steadily in a casing of the flow ejector. After long use, especially while the high-pressure fan-shaped nozzle and the rotating nozzle are operating, internal plastic limiting ledges are pressed and deformed or in severe situations even pressed and damaged, and in consequence the U-shaped pins jam, rendering it difficult to switch between the high-pressure fan-shaped nozzle, the rotating nozzle, and the low-pressure liquid sucking nozzle. It is because the contact between the U-shaped pins of round cross-sectional areas and the plastic limiting ledges is linear contact, and the contact area is too small.
- a spray gun comprising:
- the pin component comprises at least one of a linearly shaped pin with one said pin portion, a U-shaped pin with two said pin portions of equal length, and a hook-shaped pin with two said pin portions of unequal length.
- two said pin portions of the U-shaped pin are connected to two said pin portions of the hook-shaped pin by an arcuate connecting portion;
- the front mounting base has a receiving recess for receiving the connecting portion;
- two ends of the receiving recess are in communication with outer ends of two pinholes for mounting the same U-shaped pin or hook-shaped pin in place, respectively; after the U-shaped pin or hook-shaped pin has been inserted, the connecting portion is embedded in the receiving recess.
- the front mounting base has a protruding portion protruding from an outer surface of the front mounting base, and a surface of the protruding portion is an arcuate surface using an axis of the front mounting base as a central axis, allowing the receiving recess to form on the surface of the protruding portion.
- a cross section of the pin portion is kidney-shaped such that support surfaces are formed on two sides of the pin portion, and the support surfaces of the pin portion are in surface contact with the pinholes and the circumferential groove.
- the rear mounting base further has a limiting flange, and a rear end of the front mounting base has a positioning annular surface; the front mounting base and the rear mounting base are connected such that the pinholes are aligned with the circumferential groove as soon as the positioning annular surface abuts against the limiting flange.
- the spray gun further comprises:
- the nozzles comprises a high-pressure nozzle, a lotus nozzle and a low-pressure liquid sucking nozzle, with the lotus nozzle connected to the switch turntable through the nozzle base.
- the spray gun further comprises:
- the pin component and the pinholes have a tight fit, whereas the pin component and the circumferential groove have a clearance fit.
- the present invention further discloses a washing apparatus of the aforesaid spray gun, the washing apparatus comprising:
- the present invention has advantageous effects as follows: eliminating the effect of a bending moment generated by internal structure of the spray gun in operation; and increasing the contact area of the pin component such that two components in contact with each other are prevented from being pressed and deformed to the detriment of smooth rotation.
- a washing apparatus comprises a body, a water pipe, and a spray gun.
- the body has a water supply system.
- the spray gun is connected to the water supply system through the water pipe to eject water.
- the spray gun comprises a front casing 10, a front mounting base 20, a pin component 80, nozzles, a nozzle base 70, a switch turntable 30, a rear mounting base 50 and a rear casing 40.
- the front casing 10 has a front end surface, and the front end surface has thereon three through holes 10a.
- the front casing 10 is connected to the front mounting base 20 to form a package thereof for esthetical and decorative purposes.
- the rear casing 40 is connected to the rear mounting base 50.
- the front mounting base 20 has four pinholes 20c lying on the same plane and three receiving cavities 20a extending in axial direction of the front mounting base 20. Front end openings of the receiving cavities 20a are aligned with the through holes 10a, respectively. Two of the four pinholes 20c are disposed along tangential direction of the circumferential groove 50b, and the other two pinholes 20c are disposed along radial direction of the circumferential groove 50b.
- the nozzles are in the number of three, namely a high-pressure nozzle 60, a lotus nozzle 90 and a low-pressure liquid sucking nozzle.
- the three nozzles are disposed in the receiving cavities 20a, respectively.
- the switch turntable 30 has three water holes 30a aligned with the receiving cavities 20a, respectively.
- the switch turntable 30 is rotatably connected to the front mounting base 20 relative to the rear mounting base 50 and rotates synchronously with the front mounting base 20, so as to switch between different flow paths of the nozzles.
- the lotus nozzle 90 is mounted at one of the water holes 30a of the switch turntable 30 through the nozzle base 70.
- the rear mounting base 50 has a circumferential groove 50b extending in circumferential direction of the rear mounting base 50 and an eccentric flow duct 50a extending in axial direction of the rear mounting base 50.
- the rear end of the rear mounting base 50 is connected to a water pipe.
- the front mounting base 20 is rotatably connected to the front of the rear mounting base 50. Any one of the water holes 30a is coaxially aligned with the eccentric flow duct 50a while the switch turntable 30 is rotating.
- the pin component 80 is provided in the form of two hook-shaped pins.
- the hook-shaped pins each have a long pin portion 80a, a short pin portion 80a, and an arcuate connecting portion 80b which connects the two pin portions 80a.
- the cross section of each pin portion 80a is kidney-shaped such that support surfaces are formed on two sides of each pin portion 80a.
- the pin portions 80a are in surface contact with the pinholes 20c and the circumferential groove 50b through the support surfaces.
- the aforesaid structure effectively increases the contact area of the pin portions 80a such that the contact surface will not be partially pressed and damaged, thereby preventing the spray gun from becoming jammed during its service life.
- the long pin portion 80a is inserted into the pinholes 20c disposed along tangential direction of the circumferential groove 50b, and the short pin portion 80a is inserted into the pinholes 20c disposed along radial direction of the circumferential groove 50b; hence, the four pin portions 80a of the two hook-shaped pins, together with the circumferential groove 50b, provide axial support (the dark areas in FIG.
- the arrangement of the pinholes 20c is adjusted to allow support points on the lateral sides of the circumferential groove 50b and the pin portions 80a to be aligned along circumferential direction of the circumferential groove 50b and distributed uniformly.
- the aforesaid structure eliminates the effect of a bending moment generated by internal structure while the high-pressure nozzle is operating, and prevents warpage between the front mounting base 20 and the rear mounting base 50, so as to prevent the spray gun from leaking or jamming.
- the pin portions 80a being of different length, the pin portions 80a and the respective pinholes 20c have a tight fit in order to prevent the hook-shaped pins from escaping from the pinholes 20c.
- the pin component 80 has a tight fit with the pinholes 20c and has a clearance fit with the circumferential groove 50b. Hence, the pin component 80 is inserted firmly into the pinholes 20c without affecting rotation relative to the circumferential groove 50b.
- the connecting portions 80b of the hook-shaped pins mounted in place are exposed.
- Two protruding portions 20d are formed on the outer surface of the front mounting base 20. Surfaces of the protruding portions 20d are arcuate surfaces which use the axis of the front mounting base 20 as a central axis.
- a receiving recess 20b is formed on each of the arcuate surfaces. Two ends of the receiving recess 20b are in communication with outer ends of the two pin portions 80a of the same hook-shaped pin. After the hook-shaped pins have been mounted in place, the two pin portions 80a are inserted into the pinholes 20c, respectively, such that the front mounting base 20 and the rear mounting base 50 are fixed in place, whereas the connecting portions 80b are embedded in the receiving recess 20b.
- the pin portions 80a must be flush with a mounting plane in order to be smoothly inserted into the pinholes 20c and the circumferential groove 50b.
- the rear end of the front mounting base 20 has a positioning annular surface 20e, and a limiting flange 50c is disposed on the rear mounting base and behind the circumferential groove 50b.
- the pinholes 20c and the circumferential groove 50b lie on the same mounting plane, when the front mounting base 20 and the rear mounting base 50 are connected to therefore cause the positioning annular surface 20e to abut against the limiting flange 50c.
- the spray gun comprises a high-pressure nozzle 60, a lotus nozzle 90 and a low-pressure liquid sucking nozzle and is capable of switching there between by a full rotation. Adjustments can be made to the manufacturing process of the high-pressure nozzle 60 to change its droplet shape and ejection angle; and the range of its adjustable ejection angle is 0 ⁇ 60°, preferably 25 ⁇ 30°.
- the lotus nozzle 90 features round droplets, functions in the same manner as a standalone lotus spray gun, and operates at a pressure of 40 ⁇ 80 bar adjustable to meet the need for a complete spray gun.
- the low-pressure nozzle mixes the washing detergent with water by low-pressure siphoning and then carries out a washing process.
- Each internal flow path is an eccentric structure to ensure that an incoming water flow and an outgoing water flow take place along the same straight line (the arrow in FIG. 4 indicates the direction of water flow in a specific operating mode), regardless of the position at which the nozzle is operating.
- the second embodiment has distinguishing technical features as follows: the rear mounting base 50 has two circumferential grooves 50b; the front mounting base 20 has two groups of pinholes 20c disposed within two planes, respectively; and each group of pinholes 20c is aligned with a corresponding one of the circumferential grooves 50b to mount a hook-shaped pin in place.
- the rear mounting base 50 has two circumferential grooves 50b; the front mounting base 20 has two groups of pinholes 20c disposed within two planes, respectively; and each group of pinholes 20c is aligned with a corresponding one of the circumferential grooves 50b to mount a hook-shaped pin in place.
- four support points formed as a result of the aforesaid structure in the second embodiment are also located at different positions along the circumferential direction, and thus the second embodiment achieves the same technical effect as the first embodiment.
- the third embodiment which is a simple variant of the second embodiment, has distinguishing technical features as follows: the pin component 80 is provided in the form of two U-shaped pins; the U-shaped pins each have two pin portions 80a of equal length and the arcuate connecting portion 80b connecting the two pin portions 80a; the paired pinholes 20c are symmetrically arranged along tangential direction of a corresponding one of the circumferential grooves 50b; and the directions of the two groups of the pinholes 20c are perpendicular to each other such that four support points are located at different positions in the circumferential direction.
- the third embodiment achieves the same technical effect as the first embodiment.
- the fourth embodiment which is another simple variant of the second embodiment, has distinguishing technical features as follows: one pin portion 80a of each hook-shaped pin is inserted into one pinhole 20c of one of the groups of the pinholes 20c; another pin portion 80a of the hook-shaped pin is inserted into one pinhole 20c of the other group of the pinholes 20c; hence, the two pin portions 80a of the same hook-shaped pin lie on different fixing planes, respectively.
- the fifth embodiment which is another simple variant of the third embodiment, has distinguishing technical features as follows: one pin portion 80a of each hook-shaped pin is inserted into one pinhole 20c of one of the groups of the pinholes 20c; another pin portion 80a of the hook-shaped pin is inserted into one pinhole 20c of the other group of the pinholes 20c; hence, the two pin portions 80a of the same U-shaped pin lie on different fixing planes, respectively.
- the sixth embodiment has distinguishing technical features as follows: the pin component is provided in the form of three linearly shaped pins; the linearly shaped pins each have one pin portion 80a; the front mounting base has three pinholes 20c lying on the same plane; the pinholes 20c are disposed along tangential direction of the circumferential grooves 50b. Therefore, three support points formed as a result of the aforesaid structure are also located at different positions along the circumferential direction. Hence, the sixth embodiment achieves the same technical effect as the first embodiment.
- the seventh embodiment which is another simple variant of the sixth embodiment, has distinguishing technical features as follows: the pinholes 20c are disposed along radial direction of the circumferential groove 50b such that the pin portions 80a point at the center of the circumferential groove 50b.
- the aforesaid structure also achieves the same technical effect as the first embodiment.
- the pinholes are shallow, and thus short screws or dowels with outer threads are inserted into the pinholes to mesh with them. In doing so, the screws or dowels are fixed firmly to the front mounting base 20.
- a variant embodiment of the present invention features a combination of pins of different types, for example, one linearly shaped pin and one hook-shaped pin, one linearly shaped pin and one U-shaped pin, one hook-shaped pin and one U-shaped pin, two linearly shaped pins and one hook-shaped pin, two linearly shaped pins and one U-shaped pin.
- pins of different types for example, one linearly shaped pin and one hook-shaped pin, one linearly shaped pin and one U-shaped pin, one hook-shaped pin and one U-shaped pin, two linearly shaped pins and one hook-shaped pin, two linearly shaped pins and one U-shaped pin.
- Persons skilled in the art can combine the types of the pin components and determine the number of the circumferential grooves according to technical concepts of the present invention, so as to come up with different preferred solutions.
- support points are located at different positions along the circumferential direction of the circumferential groove.
- the support points are distributed along the circumferential direction of the circumferential groove; among projections formed at any cross section is at least one projection attributed to one support point; the at least one projection attributed to one support point is not collinear with the projections of any two other support points. Therefore, three support points are sufficient to effectuate axial support.
- the present invention solves a problem with the prior art, that is, warpage will occur readily if the line connecting two support points serves as an axis.
- components to be rarely demounted are connected by screws, whereas components to be regularly demounted are connected by engagement.
Abstract
Description
- The present invention relates to washer technology and, more particularly, to a spray gun and a washing apparatus.
- A commercially-available high-pressure washer has a three-on-one flow ejector which includes a high-pressure fan-shaped nozzle, a rotating nozzle, and a low-pressure liquid sucking nozzle, allowing users to rotate the flow ejector to a corresponding angle as needed, so as to switch between the three nozzles.
- The aforesaid product has two drawbacks as follows:
- To use the three nozzles of the flow ejector, it is necessary for its internal flow paths to have different axial cross-sectional areas. In particular, rotation of the flow ejector requires a large cross-sectional area of internal flow; as a result, the axial direction of an applied force is not aligned with the overall axial direction of the flow ejector. For this reason, while the flow ejector is operating, the points which an applied force generated from internal water pressure is actually exerted upon are not aligned with the actual support points of pins pointed in fixed axial directions and symmetrically distributed, thereby generating a bending moment internally. The bending moment causes internal warpage. Given time, the warpage causes the flow ejector to leak and even jam.
- U-shaped pins which are symmetrically distributed are used to mount rotating elements axially and steadily in a casing of the flow ejector. After long use, especially while the high-pressure fan-shaped nozzle and the rotating nozzle are operating, internal plastic limiting ledges are pressed and deformed or in severe situations even pressed and damaged, and in consequence the U-shaped pins jam, rendering it difficult to switch between the high-pressure fan-shaped nozzle, the rotating nozzle, and the low-pressure liquid sucking nozzle. It is because the contact between the U-shaped pins of round cross-sectional areas and the plastic limiting ledges is linear contact, and the contact area is too small.
- It is an objective of the present invention to overcome the drawbacks of the prior art by providing a spray gun and washing apparatus, so as to not only eliminate the effect of a bending moment generated by internal structure of the spray gun in operation, but also increase the contact area of the pin component such that two components in contact with each other are prevented from being pressed and deformed to the detriment of smooth rotation.
- To solve known technical problems, the present invention discloses a spray gun, comprising:
- a front mounting base having a plurality of receiving cavities extending in axial direction of the front mounting base;
- a rear mounting base having an eccentric flow duct extending in axial direction of the rear mounting base, wherein the front mounting base is rotatably connected to the rear mounting base; and
- a pin component whereby the front mounting base and the rear mounting base are axially fixed in place;
- characterized in that: the front mounting base has at least three pinholes, the rear mounting base has at least one circumferential groove extending in circumferential direction of the rear mounting base, the pin component has at least three pin portions inserted into the pinholes and the circumferential groove, respectively, to provide axial support to the circumferential groove laterally; the front mounting base and the rear mounting base are axially fixed in place and supported by the pin portions; and axial support points formed as a result of contact between the circumferential groove and the pin portions are located at least three different positions in circumferential direction of the circumferential groove, respectively.
- Furthermore, the pin component comprises at least one of a linearly shaped pin with one said pin portion, a U-shaped pin with two said pin portions of equal length, and a hook-shaped pin with two said pin portions of unequal length.
- Furthermore, two said pin portions of the U-shaped pin are connected to two said pin portions of the hook-shaped pin by an arcuate connecting portion; the front mounting base has a receiving recess for receiving the connecting portion; two ends of the receiving recess are in communication with outer ends of two pinholes for mounting the same U-shaped pin or hook-shaped pin in place, respectively; after the U-shaped pin or hook-shaped pin has been inserted, the connecting portion is embedded in the receiving recess.
- Furthermore, the front mounting base has a protruding portion protruding from an outer surface of the front mounting base, and a surface of the protruding portion is an arcuate surface using an axis of the front mounting base as a central axis, allowing the receiving recess to form on the surface of the protruding portion.
- Furthermore, a cross section of the pin portion is kidney-shaped such that support surfaces are formed on two sides of the pin portion, and the support surfaces of the pin portion are in surface contact with the pinholes and the circumferential groove.
- Furthermore, the rear mounting base further has a limiting flange, and a rear end of the front mounting base has a positioning annular surface; the front mounting base and the rear mounting base are connected such that the pinholes are aligned with the circumferential groove as soon as the positioning annular surface abuts against the limiting flange.
- Furthermore, the spray gun further comprises:
- A plurality of nozzles disposed in the receiving cavities, respectively;
- A switch turntable having a plurality of water holes aligned with the receiving cavities, respectively, with the switch turntable rotatably connected to the front mounting base relative to the rear mounting base; and
- A nozzle base for fixing one of the nozzles to the switch turntable.
- Furthermore, the nozzles comprises a high-pressure nozzle, a lotus nozzle and a low-pressure liquid sucking nozzle, with the lotus nozzle connected to the switch turntable through the nozzle base.
- Furthermore, the spray gun further comprises:
- A front casing having a front end surface on which a plurality of through holes is formed, with the front casing connected to the front mounting base to form a package thereof, wherein the through holes are aligned with front end openings of the receiving cavities, respectively; and
- a rear casing connected to the rear mounting base.
- Furthermore, the pin component and the pinholes have a tight fit, whereas the pin component and the circumferential groove have a clearance fit.
- The present invention further discloses a washing apparatus of the aforesaid spray gun, the washing apparatus comprising:
- a body having a water supply system;
- a water pipe connected to the water supply system; and
- a spray gun connected to the water supply system through the water pipe;
- characterized in that the rear mounting base has a rear end connected to an outlet end of the water pipe to form a water flow channel.
- The present invention has advantageous effects as follows: eliminating the effect of a bending moment generated by internal structure of the spray gun in operation; and increasing the contact area of the pin component such that two components in contact with each other are prevented from being pressed and deformed to the detriment of smooth rotation.
-
-
FIG. 1 is an exploded view of a spray gun according to a preferred embodiment of the present invention; -
FIG. 2 is a cross-sectional view of the spray gun according to the preferred embodiment shown inFIG. 1 ; -
FIG. 3 is a cross-sectional view taken along line A-A inFIG. 2 ; -
FIG. 4 is a schematic view of operation of the spray gun according to the preferred embodiment shown inFIG. 1 ; -
FIG. 5 is a schematic view of a rear mounting base according to the preferred embodiment shown inFIG. 1 ; -
FIG. 6 is a cross-sectional view of the spray gun according to another preferred embodiment of the present invention; -
FIG. 7 is a cross-sectional view taken along line B-B inFIG. 6 ; -
FIG. 8 is a cross-sectional view taken along line C-C inFIG. 6 ; -
FIG. 9 is a schematic view of distribution of pin components according to another preferred embodiment of the present invention; -
FIG. 10 is a schematic view of distribution of the pin components according to yet another preferred embodiment of the present invention; -
FIG. 11 is a cross-sectional view of the spray gun according to another preferred embodiment of the present invention; and -
FIG. 12 is a cross-sectional view taken along line in D-D inFIG. 11 . - The present invention is described further below with reference to accompanying drawings. Embodiments presented below are intended to explain the technical solutions of the present invention rather than limit the scope of the claims of the present invention.
- A washing apparatus comprises a body, a water pipe, and a spray gun. The body has a water supply system. The spray gun is connected to the water supply system through the water pipe to eject water.
- Referring to
FIG. 1 , the spray gun comprises afront casing 10, afront mounting base 20, apin component 80, nozzles, anozzle base 70, aswitch turntable 30, arear mounting base 50 and arear casing 40. - Referring to
FIG. 2 , thefront casing 10 has a front end surface, and the front end surface has thereon three throughholes 10a. Thefront casing 10 is connected to thefront mounting base 20 to form a package thereof for esthetical and decorative purposes. Therear casing 40 is connected to the rear mountingbase 50. - The
front mounting base 20 has fourpinholes 20c lying on the same plane and three receivingcavities 20a extending in axial direction of the front mountingbase 20. Front end openings of the receivingcavities 20a are aligned with the throughholes 10a, respectively. Two of the fourpinholes 20c are disposed along tangential direction of thecircumferential groove 50b, and the other twopinholes 20c are disposed along radial direction of thecircumferential groove 50b. - The nozzles are in the number of three, namely a high-
pressure nozzle 60, alotus nozzle 90 and a low-pressure liquid sucking nozzle. The three nozzles are disposed in the receivingcavities 20a, respectively. - The
switch turntable 30 has threewater holes 30a aligned with the receivingcavities 20a, respectively. Theswitch turntable 30 is rotatably connected to the front mountingbase 20 relative to the rear mountingbase 50 and rotates synchronously with the front mountingbase 20, so as to switch between different flow paths of the nozzles. Thelotus nozzle 90 is mounted at one of thewater holes 30a of theswitch turntable 30 through thenozzle base 70. - Referring to
FIG. 5 , the rear mountingbase 50 has acircumferential groove 50b extending in circumferential direction of the rear mountingbase 50 and aneccentric flow duct 50a extending in axial direction of the rear mountingbase 50. The rear end of the rear mountingbase 50 is connected to a water pipe. Thefront mounting base 20 is rotatably connected to the front of the rear mountingbase 50. Any one of thewater holes 30a is coaxially aligned with theeccentric flow duct 50a while theswitch turntable 30 is rotating. - Referring to
FIG. 3 , thepin component 80 is provided in the form of two hook-shaped pins. The hook-shaped pins each have along pin portion 80a, ashort pin portion 80a, and an arcuate connectingportion 80b which connects the twopin portions 80a. The cross section of eachpin portion 80a is kidney-shaped such that support surfaces are formed on two sides of eachpin portion 80a. Thepin portions 80a are in surface contact with thepinholes 20c and thecircumferential groove 50b through the support surfaces. The aforesaid structure effectively increases the contact area of thepin portions 80a such that the contact surface will not be partially pressed and damaged, thereby preventing the spray gun from becoming jammed during its service life. After the hook-shaped pins have been mounted in place, thelong pin portion 80a is inserted into thepinholes 20c disposed along tangential direction of thecircumferential groove 50b, and theshort pin portion 80a is inserted into thepinholes 20c disposed along radial direction of thecircumferential groove 50b; hence, the fourpin portions 80a of the two hook-shaped pins, together with thecircumferential groove 50b, provide axial support (the dark areas inFIG. 4 indicate the contact surfaces formed as a result of contact between thecircumferential groove 50b and the support surfaces of thepin portions 80a.) The arrangement of thepinholes 20c is adjusted to allow support points on the lateral sides of thecircumferential groove 50b and thepin portions 80a to be aligned along circumferential direction of thecircumferential groove 50b and distributed uniformly. The aforesaid structure eliminates the effect of a bending moment generated by internal structure while the high-pressure nozzle is operating, and prevents warpage between the front mountingbase 20 and the rear mountingbase 50, so as to prevent the spray gun from leaking or jamming. With thepin portions 80a being of different length, thepin portions 80a and therespective pinholes 20c have a tight fit in order to prevent the hook-shaped pins from escaping from thepinholes 20c. - To ensure firm axial connection of the front mounting
base 20 and the rear mountingbase 50 and ensure smooth rotation of the front mountingbase 20 and the rear mountingbase 50 relative to each other, thepin component 80 has a tight fit with thepinholes 20c and has a clearance fit with thecircumferential groove 50b. Hence, thepin component 80 is inserted firmly into thepinholes 20c without affecting rotation relative to thecircumferential groove 50b. - The connecting
portions 80b of the hook-shaped pins mounted in place are exposed. Two protrudingportions 20d are formed on the outer surface of the front mountingbase 20. Surfaces of the protrudingportions 20d are arcuate surfaces which use the axis of the front mountingbase 20 as a central axis. A receiving recess 20b is formed on each of the arcuate surfaces. Two ends of the receiving recess 20b are in communication with outer ends of the twopin portions 80a of the same hook-shaped pin. After the hook-shaped pins have been mounted in place, the twopin portions 80a are inserted into thepinholes 20c, respectively, such that the front mountingbase 20 and the rear mountingbase 50 are fixed in place, whereas the connectingportions 80b are embedded in the receiving recess 20b. - The
pin portions 80a must be flush with a mounting plane in order to be smoothly inserted into thepinholes 20c and thecircumferential groove 50b. To allow thepin portions 80a to become flush with the mounting plane quickly, the rear end of the front mountingbase 20 has a positioningannular surface 20e, and a limitingflange 50c is disposed on the rear mounting base and behind thecircumferential groove 50b. Thepinholes 20c and thecircumferential groove 50b lie on the same mounting plane, when the front mountingbase 20 and the rear mountingbase 50 are connected to therefore cause the positioningannular surface 20e to abut against the limitingflange 50c. - Referring to
FIG. 4 , the spray gun comprises a high-pressure nozzle 60, alotus nozzle 90 and a low-pressure liquid sucking nozzle and is capable of switching there between by a full rotation. Adjustments can be made to the manufacturing process of the high-pressure nozzle 60 to change its droplet shape and ejection angle; and the range of its adjustable ejection angle is 0∼60°, preferably 25∼30°. Thelotus nozzle 90 features round droplets, functions in the same manner as a standalone lotus spray gun, and operates at a pressure of 40∼80 bar adjustable to meet the need for a complete spray gun. To work with a washing detergent which the spray gun comes with and allow the spray gun to operate as a whole, the low-pressure nozzle mixes the washing detergent with water by low-pressure siphoning and then carries out a washing process. Each internal flow path is an eccentric structure to ensure that an incoming water flow and an outgoing water flow take place along the same straight line (the arrow inFIG. 4 indicates the direction of water flow in a specific operating mode), regardless of the position at which the nozzle is operating. - Referring to
FIG. 6 ,7 and 8 , unlike the first embodiment, the second embodiment has distinguishing technical features as follows: the rear mountingbase 50 has twocircumferential grooves 50b; the front mountingbase 20 has two groups ofpinholes 20c disposed within two planes, respectively; and each group ofpinholes 20c is aligned with a corresponding one of thecircumferential grooves 50b to mount a hook-shaped pin in place. Hence, four support points formed as a result of the aforesaid structure in the second embodiment are also located at different positions along the circumferential direction, and thus the second embodiment achieves the same technical effect as the first embodiment. - The third embodiment, which is a simple variant of the second embodiment, has distinguishing technical features as follows: the
pin component 80 is provided in the form of two U-shaped pins; the U-shaped pins each have twopin portions 80a of equal length and the arcuate connectingportion 80b connecting the twopin portions 80a; the pairedpinholes 20c are symmetrically arranged along tangential direction of a corresponding one of thecircumferential grooves 50b; and the directions of the two groups of thepinholes 20c are perpendicular to each other such that four support points are located at different positions in the circumferential direction. Hence, the third embodiment achieves the same technical effect as the first embodiment. - Referring to
FIG. 9 , the fourth embodiment, which is another simple variant of the second embodiment, has distinguishing technical features as follows: onepin portion 80a of each hook-shaped pin is inserted into onepinhole 20c of one of the groups of thepinholes 20c; anotherpin portion 80a of the hook-shaped pin is inserted into onepinhole 20c of the other group of thepinholes 20c; hence, the twopin portions 80a of the same hook-shaped pin lie on different fixing planes, respectively. - Referring to
FIG. 10 , the fifth embodiment, which is another simple variant of the third embodiment, has distinguishing technical features as follows: onepin portion 80a of each hook-shaped pin is inserted into onepinhole 20c of one of the groups of thepinholes 20c; anotherpin portion 80a of the hook-shaped pin is inserted into onepinhole 20c of the other group of thepinholes 20c; hence, the twopin portions 80a of the same U-shaped pin lie on different fixing planes, respectively. - Referring to
FIGs. 11 and12 , unlike the first embodiment, the sixth embodiment has distinguishing technical features as follows: the pin component is provided in the form of three linearly shaped pins; the linearly shaped pins each have onepin portion 80a; the front mounting base has threepinholes 20c lying on the same plane; thepinholes 20c are disposed along tangential direction of thecircumferential grooves 50b. Therefore, three support points formed as a result of the aforesaid structure are also located at different positions along the circumferential direction. Hence, the sixth embodiment achieves the same technical effect as the first embodiment. - The seventh embodiment, which is another simple variant of the sixth embodiment, has distinguishing technical features as follows: the
pinholes 20c are disposed along radial direction of thecircumferential groove 50b such that thepin portions 80a point at the center of thecircumferential groove 50b. The aforesaid structure also achieves the same technical effect as the first embodiment. In the seventh embodiment, the pinholes are shallow, and thus short screws or dowels with outer threads are inserted into the pinholes to mesh with them. In doing so, the screws or dowels are fixed firmly to the front mountingbase 20. - The aforesaid five embodiments are preferred embodiments of the present invention and feature pin components of the same type. A variant embodiment of the present invention features a combination of pins of different types, for example, one linearly shaped pin and one hook-shaped pin, one linearly shaped pin and one U-shaped pin, one hook-shaped pin and one U-shaped pin, two linearly shaped pins and one hook-shaped pin, two linearly shaped pins and one U-shaped pin. Persons skilled in the art can combine the types of the pin components and determine the number of the circumferential grooves according to technical concepts of the present invention, so as to come up with different preferred solutions.
- The statement "support points are located at different positions along the circumferential direction of the circumferential groove" above means the following: the support points are distributed along the circumferential direction of the circumferential groove; among projections formed at any cross section is at least one projection attributed to one support point; the at least one projection attributed to one support point is not collinear with the projections of any two other support points. Therefore, three support points are sufficient to effectuate axial support. Hence, the present invention solves a problem with the prior art, that is, warpage will occur readily if the line connecting two support points serves as an axis.
- According to the present invention, components to be rarely demounted are connected by screws, whereas components to be regularly demounted are connected by engagement.
- The present invention is illustrated above by preferred embodiments. It should be understood that persons skilled in the art can make some improvements and variations to the preferred embodiments of the present invention without departing from technical principles of the present invention, and that the improvements and variations shall be deemed falling within the scope of the claims of the present invention.
Claims (11)
- A spray gun, comprising:a front mounting base (20) having a plurality of receiving cavities (20a) extending in axial direction of the front mounting base (20);a rear mounting base (50) having an eccentric flow duct (50a) extending in axial direction of the rear mounting base (50), wherein the front mounting base (20) is rotatably connected to the rear mounting base (50); anda pin component (80) whereby the front mounting base (20) and the rear mounting base (50) are axially fixed in place;characterized in that: the front mounting base (20) has at least three pinholes (20c), the rear mounting base (50) has at least one circumferential groove (50b) extending in circumferential direction of the rear mounting base (50), the pin component (80) has at least three pin portions (80a) inserted into the pinholes (20c) and the circumferential groove (50b), respectively, to provide axial support to the circumferential groove (50b) laterally; the front mounting base (20) and the rear mounting base (50) are axially fixed in place and supported by the pin portions (80a); and axial support points formed as a result of contact between the circumferential groove (50b) and the pin portions (80a) are located at least three different positions in circumferential direction of the circumferential groove (50b), respectively.
- The spray gun of claim 1, characterized in that the pin component comprises at least one of a linearly shaped pin with one said pin portion (80a), a U-shaped pin with two said pin portions (80a) of equal length, and a hook-shaped pin with two said pin portions (80a) of unequal length.
- The spray gun of claim 2, characterized in that: two said pin portions (80a) of the U-shaped pin are connected to two said pin portions (80a) of the hook-shaped pin by an arcuate connecting portion (80b); the front mounting base has a receiving recess (20b) for receiving the connecting portion (80b); two ends of the receiving recess (20b) are in communication with outer ends of two pinholes (20c) for mounting the same U-shaped pin or hook-shaped pin in place, respectively; after the U-shaped pin or hook-shaped pin has been inserted, the connecting portion (80b) is embedded in the receiving recess (20b).
- The spray gun of claim 3, characterized in that the front mounting base (20) has a protruding portion (20d) protruding from an outer surface of the front mounting base (20), and a surface of the protruding portion (20d) is an arcuate surface using an axis of the front mounting base (20) as a central axis, allowing the receiving recess (20b) to form on the surface of the protruding portion (20d).
- The spray gun of claim 1, characterized in that a cross section of the pin portion (80a) is kidney-shaped such that support surfaces are formed on two sides of the pin portion (80a), and the support surfaces of the pin portion (80a) are in surface contact with the pinholes (20c) and the circumferential groove (50b).
- The spray gun of claim 1, characterized in that: the rear mounting base (50) further has a limiting flange (50c), and a rear end of the front mounting base has a positioning annular surface (20e); the front mounting base (20) and the rear mounting base (50) are connected such that the pinholes (20c) are aligned with the circumferential groove (50b) as soon as the positioning annular surface (20e) abuts against the limiting flange (50c).
- The spray gun of claim 1, further comprising:a plurality of nozzles disposed in the receiving cavities (20a), respectively;a switch turntable (30) having a plurality of water holes (30a) aligned with the receiving cavities (20a), respectively, with the switch turntable (30) rotatably connected to the front mounting base (20) relative to the rear mounting base (50); anda nozzle base (70) for fixing one of the nozzles to the switch turntable (30).
- The spray gun of claim 7, characterized in that the nozzles comprises a high-pressure nozzle (60), a lotus nozzle (90) and a low-pressure liquid sucking nozzle, with the lotus nozzle (90) connected to the switch turntable (30) through the nozzle base (70).
- The spray gun of claim 1, further comprising:a front casing (10) having a front end surface on which a plurality of through holes (10a) is formed, with the front casing (10) connected to the front mounting base (20) to form a package thereof, wherein the through holes (10a) are aligned with front end openings of the receiving cavities (20a), respectively; anda rear casing (40) connected to the rear mounting base (50).
- The spray gun of claim 1, characterized in that the pin component (80) and the pinholes (20c) have a tight fit, whereas the pin component (80) and the circumferential groove (50b) have a clearance fit.
- A washing apparatus, comprising:a body having a water supply system;a water pipe connected to the water supply system; anda spray gun connected to the water supply system through the water pipe;characterized in that: the spray gun is the spray gun of any one of claims 1-9; the rear mounting base (50) has a rear end connected to an outlet end of the water pipe to form a water flow channel.
Applications Claiming Priority (1)
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CN201710193177.1A CN106861964B (en) | 2017-03-28 | 2017-03-28 | Spray gun and cleaning equipment |
Publications (2)
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EP3381565A1 true EP3381565A1 (en) | 2018-10-03 |
EP3381565B1 EP3381565B1 (en) | 2020-04-08 |
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EP18156402.2A Active EP3381565B1 (en) | 2017-03-28 | 2018-02-13 | Spray gun and washing apparatus |
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EP (1) | EP3381565B1 (en) |
CN (1) | CN106861964B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2582363A (en) * | 2019-03-21 | 2020-09-23 | Exel Ind Sa | Pressure sprayer nozzles |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112474084B (en) * | 2020-11-11 | 2022-03-01 | 山东省科学院自动化研究所 | Cavitation jet flow intelligent nozzle and underwater cleaning robot |
CN113877737B (en) * | 2021-12-08 | 2022-04-08 | 昌乐县人民医院 | Multifunctional injection device |
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DE2437025A1 (en) * | 1974-08-01 | 1976-02-19 | Lechler Apparatebau Kg | DEVICE FOR FASTENING A NOZZLE IN A PIPE |
US6113009A (en) * | 1997-07-04 | 2000-09-05 | Chih; I-Shun | Sprinkler head adjusting structure |
EP1897620A2 (en) * | 2006-09-07 | 2008-03-12 | Briggs & Stratton | Pressure washer wand having a nozzle selector |
US20130014963A1 (en) * | 2011-07-11 | 2013-01-17 | Frank Thomas Porta | Quick connect fire and dust suppression system |
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CA1038622A (en) * | 1974-02-19 | 1978-09-19 | Gustave S. Levey | Spray gun |
US4257561A (en) * | 1979-06-05 | 1981-03-24 | Ethyl Products Company | Child-resistant dispensing nozzle assembly |
FR2788231B1 (en) * | 1999-01-11 | 2001-03-09 | Itw Surfaces & Finitions | SPRAY HEAD OF A PRODUCT SUCH AS PAINT |
DE202010004934U1 (en) * | 2010-04-13 | 2011-08-29 | Allper Ag | Piston for a cold chamber casting machine |
CN102059179B (en) * | 2010-12-06 | 2012-11-28 | 厦门松霖科技有限公司 | Rocker switching shower head |
CN206661485U (en) * | 2017-03-28 | 2017-11-24 | 南京苏美达动力产品有限公司 | A kind of spray gun and cleaning equipment |
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DE2437025A1 (en) * | 1974-08-01 | 1976-02-19 | Lechler Apparatebau Kg | DEVICE FOR FASTENING A NOZZLE IN A PIPE |
US6113009A (en) * | 1997-07-04 | 2000-09-05 | Chih; I-Shun | Sprinkler head adjusting structure |
EP1897620A2 (en) * | 2006-09-07 | 2008-03-12 | Briggs & Stratton | Pressure washer wand having a nozzle selector |
US20130014963A1 (en) * | 2011-07-11 | 2013-01-17 | Frank Thomas Porta | Quick connect fire and dust suppression system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2582363A (en) * | 2019-03-21 | 2020-09-23 | Exel Ind Sa | Pressure sprayer nozzles |
GB2582363B (en) * | 2019-03-21 | 2023-04-05 | Exel Ind Sa | Pressure sprayer nozzles |
Also Published As
Publication number | Publication date |
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CN106861964A (en) | 2017-06-20 |
EP3381565B1 (en) | 2020-04-08 |
CN106861964B (en) | 2022-07-01 |
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