Multifunctional blowing and sucking electric tool with replaceable working head

Abstract

The multifunctional blowing and sucking electric tool with the replaceable working head comprises a machine body, the two ends of the machine body are provided with a working head assembly and a cover body respectively, the working head assembly and the cover body are connected with the machine body in a buckled mode, and any end of the machine body can be provided with the working head assembly and the cover body in a matched mode. A handle assembly rotationally connected with the machine body is arranged below the machine body, and a locking switch used for locking the handle assembly is arranged on the side face of the machine body. A driving motor with a blowing and sucking function is arranged in the machine body, and the two ends of the driving motor face the working head assembly and the cover body respectively. The machine body and the working head assemblies are detachably connected, the working head assemblies can be installed at the two ends of the machine body, and the handle assembly below the machine body can rotate to work; the working head assembly has multiple functions and is good in universality.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tools, and particularly relates to a multifunctional blowing and suction power tool with replaceable working heads. Background Technique

[0002] Power tools are commonly used construction tools in daily life. Generally, existing power tools are of an integral structure and have relatively single functions. Generally, a power tool usually includes a body main body, a driving motor for blowing and suction is arranged in the body main body, and a working head integrally formed with the body main body is arranged in the body main body. When the driving motor works, it drives the working head to output work. Because when a power tool uses a driving motor to blow air or suck air, the blowing and suction work can often be completed by a single driving motor; generally, there are many existing power tools for blowing and suction, but because the working head and the body main body are integrally formed, the integral structure blowing and suction power tool often only has a single functional module and has poor versatility. At the same time, the body main body and the handle are often also of an integral structure, so that the handle cannot be turned to work, and the operation is not convenient enough. Therefore, it is necessary to design a multifunctional blowing and suction power tool with replaceable working heads to overcome the above difficulties. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the utility model designs a multifunctional blowing and suction power tool with replaceable working heads. The body main body and the working head assembly of the utility model are detachably connected, and the working head assemblies can be installed at both ends of the body main body. The handle assembly under the body main body can rotate to work; the working head assembly has multiple functions and good versatility.

[0004] The invention object of the utility model is realized by the following technical scheme: a multifunctional blowing and suction power tool with replaceable working heads, including a body main body, working head assemblies and covers detachably connected to both ends of the body main body respectively, and any end of the body main body can be adapted to install the working head assemblies and the covers; a handle assembly rotatably connected to the body main body is arranged under the body main body, and a locking switch for locking the handle assembly is arranged on the side surface of the body main body; a driving motor with blowing and suction functions is arranged in the body main body, and both ends of the driving motor are respectively arranged towards the working head assemblies and the covers.

[0005] Preferably, the working head assemblies include a spraying working head, a bladeless fan working head, a dust suction working head and a blowing working head; limiting slots for positioning and installation are arranged on the spraying working head, the bladeless fan working head, the dust suction working head and the blowing working head, and limiting slots for positioning and installation are also arranged on the cover; limiting protrusions for positioning and installation are arranged on two open ends of the body main body, and the limiting protrusions are rotatably installed in the limiting slots.

[0006] The working head assembly has a working head with multiple functional modules, which has multiple functions and good versatility. The spraying working head, bladeless fan working head, dust suction working head and blowing working head are all provided with limit card slots for positioning and installation, which facilitates snap-on installation onto the body main body. Each time of installation, the limit protrusion is snapped into the limit card slot, and the working head assembly is rotated, so that the working head assembly can be firmly installed on the body main body; similarly, the cover body can also be firmly installed on the body main body through the cooperation of the limit protrusion and the limit card slot. When the blowing function needs to be used, the spraying working head, bladeless fan working head and blowing working head are installed on the same side of the body main body, and the spraying working head, bladeless fan working head and blowing working head face the air outlet direction of the driving motor; when the suction function needs to be used, the directions of the dust suction working head and the cover body are swapped and installed, so that the dust suction working head faces the air inlet direction of the driving motor. At the same time, the handle assembly is rotated 180 degrees and locked through the locking switch.

[0007] Preferably, a handle assembly rotatably connected thereto is provided below the body main body, and an installation hole for installing a locking switch is provided on the side surface of the body main body; the handle assembly includes a handle body and a limit rotating block, and the handle body and the limit rotating block are respectively arranged inside and outside the body main body; a fastener for fixing the two is provided between the limit rotating block and the handle body, and both the limit rotating block and the handle body are rotatably connected to the body main body; a first card slot is provided on the locking switch, and a plurality of first protrusions for locking are provided on the limit rotating block; the first protrusions are arranged in the first card slot, and the outer contour shapes of the first protrusions and the first card slot match each other.

[0008] By default, the first protrusion is stuck in the first card slot, and the handle assembly is in a locked state; a spring for resetting is provided between the locking switch and the inner wall of the body main body, and the spring is not drawn in the drawings. When it is necessary to unlock the handle assembly, the locking switch is pushed to move the first card slot away from the first protrusion, so that the limit rotating block can rotate relative to the body main body after losing the limit. When the limit rotating block rotates 180 degrees, the locking switch is released, so that the first card slot fits with the first protrusion again, and the handle assembly automatically enters the locked state.

[0009] Preferably, the spraying working head includes a spraying housing, a nozzle assembly, an air volume regulating assembly and a spraying volume regulating assembly; the spraying housing is snap-connected to the body main body; an airbag is provided above the spraying housing, and a storage bag is provided in the cavity surrounded by the airbag, and the storage bag is communicated with the nozzle assembly; the air volume regulating assembly is fixedly installed in the spraying working head and communicated with the airbag, and when the driving motor works, gas enters the airbag from the air volume regulating assembly; the nozzle assembly includes a nozzle mounting seat, and a discharge port and a valve needle capable of telescoping relative to the discharge port are provided in the nozzle mounting seat. When the paint in the storage bag enters the nozzle mounting seat, the paint squeezes the valve needle to open the discharge port.

[0010] When the working head assembly is a spraying working head, the spraying working head is installed towards the air outlet direction of the driving motor; when the fan blades of the driving motor are working, gas enters the airbag from the air volume regulating assembly, and the airbag will expand and squeeze the material storage bag. After the material storage bag is squeezed, the paint will evenly enter the nozzle assembly; when the paint enters the nozzle assembly, the paint will squeeze the valve needle, and the valve needle will move away from the discharge port, and the discharge port will be in an open state, so that the paint will be continuously extruded. Before the gas enters the airbag, the air intake volume of the airbag can be adjusted by the air volume regulating assembly. When the intake air flow rate of the air volume regulating assembly is larger, the airbag expands faster and the paint extrusion speed is faster; when the intake air flow rate of the air volume regulating assembly is smaller, the airbag expands slower and the paint extrusion speed is slower. The left and right moving stroke of the valve needle can be adjusted by the spraying volume regulating assembly, so as to adjust the distance between the valve needle and the discharge port. When the distance between the valve needle and the discharge port is larger, the paint discharge volume is larger; when the distance between the valve needle and the discharge port is smaller, the paint discharge volume is smaller.

[0011] Preferably, the nozzle mounting seat is snap-fitted on the spraying housing; the spraying volume regulating assembly includes an adjusting knob and an eccentric cam. When the adjusting knob rotates, it drives the eccentric cam to rotate; a return spring is sleeved outside the valve needle, and the end of the eccentric cam is arranged towards the valve needle; a sliding member slidably connected to the spraying housing is arranged inside the spraying housing. One end of the valve needle is installed on the nozzle mounting seat, and the other end of the valve needle is installed on the sliding member.

[0012] By driving the eccentric cam to rotate through the adjusting knob, the distance between the eccentric cam and the valve needle can be adjusted. When the paint squeezes the valve needle, the end of the valve needle will finally abut against the eccentric cam, so that the distance between the valve needle and the discharge port can be ensured to be fixed during the discharging process. By arranging the sliding member, the valve needle can move slowly. By arranging the return spring, it is convenient for the valve needle to reset. When the driving motor stops working, the paint no longer enters the nozzle mounting seat, so that the valve needle automatically abuts against the discharge port under the action of the return spring, and the discharge port automatically closes.

[0013] Preferably, the bladeless fan working head includes a fan housing and an air outlet frame; the fan housing is snap-connected to the fuselage main body, and the fan housing and the air outlet frame are mutually communicated; an annular air outlet is arranged at the edge of the air outlet frame.

[0014] When the working head assembly is a bladeless fan working head, the bladeless fan working head is installed towards the air outlet direction of the driving motor, so that it can be used as a fan. When the driving motor is working, gas enters the fan housing, then enters the air outlet frame from the fan housing, and finally the gas is discharged from the annular air outlet of the air outlet frame.

[0015] Preferably, a control circuit board is provided inside the fan housing, and an annular light strip is provided on the front end face of the air outlet frame. The annular light strip is electrically connected to the control circuit board. A start switch is provided on the fan housing. When the start switch is pressed, the control circuit board is turned on to make the annular light strip emit light, so that the working head of the bladeless fan also has a lighting function.

[0016] Preferably, the dust suction working head includes a dust suction housing, and a spiral dust suction member is provided inside the dust suction housing; a dust suction port is provided at the open end of the dust suction housing near the top, and the dust suction port is communicated with the spiral dust suction member; a support base is provided at the end of the spiral dust suction member. When the dust suction housing is snap-connected to the body main body, the support base abuts against the open end of the body main body; a storage chamber is provided below the spiral dust suction member, and a sealing cover rotatably connected thereto is provided on the storage chamber. A button switch for locking the sealing cover is provided on the dust suction housing.

[0017] Preferably, a one-way elastic piece is provided between the dust suction port and the spiral dust suction member, and the edge of the one-way elastic piece is fixedly installed on the inner wall of the dust suction housing; a limiting step is provided inside the dust suction housing, and the spiral dust suction member abuts against the limiting step; a rotating shaft for pivoting is provided between the sealing cover and the dust suction housing, and a torsion spring for resetting is provided between the rotating shaft and the dust suction housing. The torsion spring is sleeved on the rotating shaft; a button switch rotatably connected to the dust suction housing is provided below the dust suction housing, and a first spring is provided between the button switch and the outer wall of the dust suction housing; an outwardly protruding buckle is provided on the edge of the button switch, and an inwardly concave card slot is provided on the sealing cover; when the sealing cover is in the closed state, the outwardly protruding buckle is arranged in the inwardly concave card slot; the outwardly protruding buckle and the first spring are respectively arranged on both sides of the rotating shaft of the button switch; a filter screen layer is provided between the end of the spiral dust suction member and the support base, and when the drive motor works, the gas diffuses along the filter screen layer.

[0018] When the working head assembly is a dust suction working head, the dust suction working head is installed in the intake direction of the driving motor; the one-way elastic piece is an elastic rubber piece. By setting the one-way elastic piece, dust and gas can only enter the storage chamber from the outside along the dust suction port, and the dust in the storage chamber cannot be discharged from the dust suction port; when the driving motor works, a negative pressure is generated inside the body main body, and the gas is sucked into the body main body along the filter net layer and then discharged from the direction where the cover body is located. When the gas diffuses, the dust enters the storage chamber along the spiral dust suction piece; since a support base is provided inside the dust suction housing and separated by the support base, the dust cannot enter the body main body; since the dust suction port is set higher than the storage chamber, when the dust is sucked in by the spiral dust suction piece, the dust will automatically fall and gather in the storage chamber under the action of gravity. In the default state, the sealing cover is in the closed state, and the outward convex buckle is arranged in the inward concave clamping groove. Since a first spring is provided between the button switch and the outer wall of the dust suction housing, the button switch can only rotate when an external force presses the button switch. When it is necessary to pour out the dust, press the button switch, and the button switch rotates relative to the dust suction housing, and the outward convex buckle disengages from the inward concave clamping groove, and the sealing cover automatically pops open under the action of the torsion spring. When it is necessary to close the sealing cover, rotate the sealing cover so that the inward concave clamping groove is re-mated and locked with the outward convex buckle.

[0019] Preferably, the air blowing working head includes an air blowing housing, a locking seat snap-connected to the air blowing housing is provided on the air blowing housing, and a second spring is provided between the locking seat and the air blowing housing; the air blowing housing is snap-connected to the body main body, a second clamping groove is provided on the shaft sleeve of the air blowing housing, and a plurality of second protrusions are provided on the locking seat; when the locking seat is installed on the shaft sleeve of the air blowing housing, the second protrusions are stuck in the second clamping groove; a second spring is provided on the shaft sleeve of the air blowing housing, and the end of the second spring abuts against the locking seat; an arc-shaped step is provided on the locking seat, and the end of the second spring abuts against the arc-shaped step; an arc-shaped clamping groove for installing an external air outlet part is provided on the shaft sleeve of the air blowing housing, and when the locking seat is axially pressed, the arc-shaped step is displaced relative to the arc-shaped clamping groove.

[0020] When the working head assembly is an air blowing working head, the operation is mainly carried out by installing an external air outlet part on the air blowing housing; the external air outlet part is not drawn in the attached drawings, and a protrusion is provided on the external air outlet part; when it is necessary to install the external air outlet part, first axially press the locking seat, so that the arc-shaped step is misaligned relative to the arc-shaped clamping groove; then push the external air outlet part into the shaft sleeve of the air blowing housing, so that the protrusion of the external air outlet part is stuck in the arc-shaped clamping groove; then release the locking seat, and the locking seat axially moves under the action of the second spring, and the arc-shaped step on the locking seat moves and is stuck outside the protrusion of the external air outlet part, so that the external air outlet part can be firmly installed on the air blowing housing. A second protrusion is provided on the locking seat, and the locking seat is rotated so that the second protrusion is stuck in the second clamping groove. Since the end of the second spring abuts against the arc-shaped step, the locking seat will not disengage from the air blowing housing.

[0021] Compared with the prior art, the utility model has the following beneficial effects: 1. The fuselage main body and the working head assembly of the utility model are detachably connected, and the working head assembly has multiple functions, with good versatility; 2. Both ends of the fuselage main body can be adapted to install the working head assembly and the cover body, and the handle assembly can rotate relative to the fuselage main body, which is convenient for adapting to working heads of different models. 3. A driving motor with blowing and suction functions is provided inside the fuselage main body. The spraying working head, the bladeless fan working head and the blowing working head use the air outlet function of the driving motor, and the dust suction working head uses the suction function of the driving motor; Using a single driving motor can adapt to working heads with different functions, greatly reducing the manufacturing cost. Description of the Drawings

[0022] Figure 1 Is a three-dimensional view when the fuselage main body and the cover body are assembled;

[0023] Figure 2 Is a three-dimensional view of the fuselage main body;

[0024] Figure 3 Is a three-dimensional view when the fuselage main body and the spraying working head are assembled;

[0025] Figure 4 Is a schematic diagram of the internal structure of the spraying working head;

[0026] Figure 5 Is an exploded view of the handle assembly;

[0027] Figure 6 Is a three-dimensional view of the spraying housing;

[0028] Figure 7 Is a three-dimensional view when the fuselage main body and the bladeless fan working head are assembled;

[0029] Figure 8 Is a three-dimensional view of the bladeless fan working head;

[0030] Figure 9 Is a schematic diagram of the internal structure of the bladeless fan working head;

[0031] Figure 10 Is a three-dimensional view when the fuselage main body and the dust suction working head are assembled;

[0032] Figure 11 Is an exploded view of the dust suction working head;

[0033] Figure 12 Is a schematic diagram of the internal structure of the dust suction working head;

[0034] Figure 13 Is a three-dimensional view when the fuselage main body and the blowing working head are assembled;

[0035] Figure 14 Is an exploded view of the blowing working head;

[0036] Figure 15 An exploded view of another perspective of the air-blowing working head;

[0037] Markings in the figure: 1. Body main body; 2. Cover body; 3. Handle assembly; 31. Handle main body; 32. Limit rotation block; 33. Fastener; 4. Locking switch; 5. Driving motor; 6. Spraying working head; 61. Spraying housing; 62. Nozzle assembly; 621. Nozzle mounting seat; 622. Discharge port; 623. Valve needle; 63. Air volume regulating assembly; 64. Spraying volume regulating assembly; 641. Adjusting knob; 642. Eccentric cam; 65. Airbag; 66. Storage bag; 67. Return spring; 68. Sliding part; 7. Bladeless fan working head; 71. Fan housing; 72. Air outlet frame; 73. Annular air outlet; 74. Control circuit board; 75. Annular light strip; 76. Start switch; 8. Dust suction working head; 81. Dust suction housing; 82. Spiral dust suction part; 83. Dust suction port; 84. Support base; 85. Storage chamber; 86. Sealing cover; 87. Button switch; 88. One-way elastic piece; 89. Limit step; 810. Rotating shaft; 811. Torsion spring; 812. First spring; 813. Filter screen layer; 9. Air-blowing working head; 91. Air-blowing housing; 92. Locking seat; 93. Second spring; 94. Second card slot; 95. Second protrusion; 96. Arc step; 97. Arc card slot; 10. Limit card slot; 11. Limit protrusion; 12. Mounting hole; 13. First card slot; 14. First protrusion; 15. Outer convex buckle; 16. Inner concave card slot. Specific embodiments

[0038] The following further describes the present utility model in conjunction with the embodiments shown in the drawings:

[0039] As Figures 1 to 15 shown, this embodiment discloses a multifunctional blowing and suction electric tool with replaceable working heads, including a body main body 1. Working head assemblies and a cover body 2 are respectively provided at both ends of the body main body 1 and are snap-connected thereto. Any end of the body main body 1 can be adapted to install the working head assemblies and the cover body 2; a handle assembly 3 is provided below the body main body 1 and is rotatably connected thereto, and a locking switch 4 for locking the handle assembly 3 is provided on the side surface of the body main body 1; a driving motor 5 with blowing and suction functions is provided inside the body main body 1, and both ends of the driving motor 5 are respectively arranged towards the working head assemblies and the cover body 2.

[0040] The working head assembly includes a spraying working head 6, a bladeless fan working head 7, a dust suction working head 8, and a blowing working head 9; the spraying working head 6, the bladeless fan working head 7, the dust suction working head 8, and the blowing working head 9 are all provided with limit card slots 10 for positioning and installation, and the cover body 2 is also provided with limit card slots 10 for positioning and installation; both open ends of the fuselage main body 1 are provided with limit protrusions 11 for positioning and installation, and the limit protrusions 11 are rotatably installed in the limit card slots 10. A handle assembly 3 rotatably connected to the fuselage main body 1 is provided below the fuselage main body 1, and an installation hole 12 for installing a locking switch 4 is provided on the side of the fuselage main body 1; the handle assembly 3 includes a handle body 31 and a limit rotating block 32, and the handle body 31 and the limit rotating block 32 are respectively arranged inside and outside the fuselage main body 1; a fastener 33 for fixing the two is provided between the limit rotating block 32 and the handle body 31, and the limit rotating block 32 and the handle body 31 are both rotatably connected to the fuselage main body 1; a first card slot 13 is provided on the locking switch 4, and a number of first protrusions 14 for locking are provided on the limit rotating block 32; the first protrusions 14 are arranged in the first card slot 13, and the outer contour of the first protrusions 14 and the first card slot 13 match each other.

[0041] The spraying working head 6 includes a spraying housing 61, a nozzle assembly 62, an air volume adjusting assembly 63, and a spraying volume adjusting assembly 64; the spraying housing 61 is snap-connected to the fuselage main body 1; an airbag 65 is provided above the spraying housing 61, and a storage bag 66 is provided in the cavity surrounded by the airbag 65, and the storage bag 66 is communicated with the nozzle assembly 62; the air volume adjusting assembly 63 is fixedly installed in the spraying working head 6 and communicated with the airbag 65, and when the driving motor 5 works, gas enters the airbag 65 from the air volume adjusting assembly 63; the nozzle assembly 62 includes a nozzle mounting seat 621, a discharge port 622 and a valve needle 623 capable of telescoping relative to the discharge port 622 are provided in the nozzle mounting seat 621, and when the paint in the storage bag 66 enters the nozzle mounting seat 621, the paint squeezes the valve needle 623 to open the discharge port 622. The nozzle mounting seat 621 is snap-mounted on the spraying housing 61; the spraying volume adjusting assembly 64 includes an adjusting knob 641 and an eccentric cam 642, and when the adjusting knob 641 rotates, it drives the eccentric cam 642 to rotate; a return spring 67 is sleeved outside the valve needle 623, and the end of the eccentric cam 642 faces the valve needle 623; a sliding member 68 slidably connected to the spraying housing 61 is provided in the spraying housing 61, one end of the valve needle 623 is installed on the nozzle mounting seat 621, and the other end of the valve needle 623 is installed on the sliding member 68.

[0042] The bladeless fan working head 7 includes a fan housing 71 and an air outlet frame 72; the fan housing 71 is snap-connected to the body main body 1, and the fan housing 71 and the air outlet frame 72 are in mutual communication; an annular air outlet 73 is provided at the edge of the air outlet frame 72. A control circuit board 74 is provided in the fan housing 71, and an annular light strip 75 is provided on the front end face of the air outlet frame 72, and the annular light strip 75 is electrically connected to the control circuit board 74.

[0043] The dust suction working head 8 includes a dust suction housing 81, and a spiral dust suction member 82 is provided in the dust suction housing 81; a dust suction port 83 is provided at the open end of the dust suction housing 81 close to the top, and the dust suction port 83 is in communication with the spiral dust suction member 82; a support base 84 is provided at the end of the spiral dust suction member 82, and when the dust suction housing 81 is snap-connected to the body main body 1, the support base 84 abuts against the open end of the body main body 1; a storage chamber 85 is provided below the spiral dust suction member 82, and a sealing cover 86 rotatably connected thereto is provided on the storage chamber 85, and a button switch 87 for locking the sealing cover 86 is provided on the dust suction housing 81. A one-way elastic piece 88 is provided between the dust suction port 83 and the spiral dust suction member 82, and the edge of the one-way elastic piece 88 is fixedly installed on the inner wall of the dust suction housing 81; a limiting step 89 is provided in the dust suction housing 81, and the spiral dust suction member 82 abuts against the limiting step 89; a rotating shaft 810 for pivotal connection is provided between the sealing cover 86 and the dust suction housing 81, and a torsion spring 811 for resetting is provided between the rotating shaft 810 and the dust suction housing 81, and the torsion spring 811 is sleeved on the rotating shaft 810; a button switch 87 rotatably connected to the dust suction housing 81 is provided below the dust suction housing 81, and a first spring 812 is provided between the button switch 87 and the outer wall of the dust suction housing 81; an outwardly protruding buckle 15 is provided at the edge of the button switch 87, and an inwardly concave card slot 16 is provided on the sealing cover 86; when the sealing cover 86 is in the closed state, the outwardly protruding buckle 15 is arranged in the inwardly concave card slot 16; the outwardly protruding buckle 15 and the first spring 812 are respectively arranged on both sides of the rotation axis of the button switch 87; a filter screen layer 813 is provided between the end of the spiral dust suction member 82 and the support base 84, and when the drive motor 5 works, gas diffuses along the filter screen layer 813.

[0044] The air-blowing working head 9 includes an air-blowing housing 91. A locking seat 92 is provided on the air-blowing housing 91 and is snap-connected thereto. A second spring 93 is provided between the locking seat 92 and the air-blowing housing 91. The air-blowing housing 91 is snap-connected to the fuselage main body 1. A second card slot 94 is provided on the bushing of the air-blowing housing 91, and a number of second protrusions 95 are provided on the locking seat 92. When the locking seat 92 is installed on the bushing of the air-blowing housing 91, the second protrusions 95 are stuck in the second card slot 94. A second spring 93 is provided on the bushing of the air-blowing housing 91, and the end of the second spring 93 abuts against the locking seat 92. An arc-shaped step 96 is provided on the locking seat 92, and the end of the second spring 93 abuts against the arc-shaped step 96. An arc-shaped card slot 97 for installing an external air outlet member is provided on the bushing of the air-blowing housing 91. When the locking seat 92 is axially pressed, the arc-shaped step 96 is displaced relative to the arc-shaped card slot 97.

[0045] The specific operation process of this embodiment is as follows. The working head of the working head assembly has multiple functional modules, with multiple functions and good versatility. Limiting card slots 10 for positioning and installation are provided on the spraying working head 6, the bladeless fan working head 7, the dust-absorbing working head 8, and the air-blowing working head 9, which facilitates snap installation onto the fuselage main body 1. Each time for installation, the limiting protrusion 11 is snapped into the limiting card slot 10, and the working head assembly is rotated, so that the working head assembly can be firmly installed on the fuselage main body 1. Similarly, the cover body 2 can also be firmly installed on the fuselage main body 1 through the cooperation of the limiting protrusion 11 and the limiting card slot 10. When the air-blowing function needs to be used, the spraying working head 6, the bladeless fan working head 7, and the air-blowing working head 9 are installed on the same side of the fuselage main body 1, and the spraying working head 6, the bladeless fan working head 7, and the air-blowing working head 9 face the air outlet direction of the driving motor 5. When the suction function needs to be used, the directions of the dust-absorbing working head 8 and the cover body 2 are swapped for installation, so that the dust-absorbing working head 8 faces the air intake direction of the driving motor 5. At the same time, the handle assembly is rotated 180 degrees and locked by the locking switch 4. In the default state, the first protrusion 14 is stuck in the first card slot 13, and the handle assembly 3 is in the locked state. A spring for resetting is provided between the locking switch 4 and the inner wall of the fuselage main body 1, and the spring is not shown in the drawings. When the handle assembly 3 needs to be unlocked, the locking switch 4 is pushed to move the first card slot 13 away from the first protrusion 14, then the limiting rotation block 32 can rotate relative to the fuselage main body 1 after losing the limit. When the limiting rotation block 32 rotates 180 degrees, the locking switch 4 is released, so that the first card slot 13 fits with the first protrusion 14 again, and the handle assembly 3 automatically enters the locked state.

[0046] When the working head assembly is the spraying working head 6, the spraying working head 6 is installed facing the air outlet direction of the driving motor 5; when the fan blades of the driving motor 5 work, gas enters the airbag 65 from the air volume regulating assembly 63, and the airbag 65 will expand and squeeze the material storage bag 66. After the material storage bag 66 is squeezed, the paint will evenly enter the nozzle assembly 62; when the paint enters the nozzle assembly 62, the paint will squeeze the valve needle 623, and the valve needle 623 will move away from the material outlet 622, and the material outlet 622 is in an open state, so that the paint will be continuously extruded. Before the gas enters the airbag 65, the intake air volume of the airbag 65 can be adjusted by the air volume regulating assembly 63. When the intake air flow rate of the air volume regulating assembly 63 is large, the airbag 65 expands faster and the paint extrusion speed is faster; when the intake air flow rate of the air volume regulating assembly 63 is small, the airbag 65 expands slower and the paint extrusion speed is slower. The left and right moving stroke of the valve needle 623 can be adjusted by the spraying volume regulating assembly 64, so as to adjust the distance between the valve needle 623 and the material outlet 622. When the distance between the valve needle 623 and the material outlet 622 is large, the paint discharge volume is large; when the distance between the valve needle 623 and the material outlet 622 is small, the paint discharge volume is small.

[0047] When the working head assembly is the bladeless fan working head 7, the bladeless fan working head 7 is installed facing the air outlet direction of the driving motor 5, so that it can be used as a fan. When the driving motor 5 works, gas enters the fan housing 71, then enters the air outlet frame 72 from the fan housing 71, and finally the gas is discharged from the annular air outlet 73 of the air outlet frame 72. A start switch 76 is provided on the fan housing 71. When the start switch 76 is pressed, the control circuit board 74 is turned on to make the annular light belt 75 emit light, so that the bladeless fan working head 7 also has a lighting function.

[0048] When the working head assembly is the dust suction working head 8, the dust suction working head 8 is installed in the air inlet direction of the driving motor 5; the one-way elastic piece 88 is an elastic rubber piece. By arranging the one-way elastic piece 88, dust and gas can only enter the storage chamber 85 from the outside along the dust suction port 83, and the dust in the storage chamber 85 cannot be discharged from the dust suction port 83. When the driving motor 5 works, a negative pressure is generated inside the body main body 1, and the gas is sucked into the body main body 1 along the filter screen layer 813 and then discharged from the direction where the cover body 2 is located. When the gas diffuses, the dust enters the storage chamber 85 along the spiral dust suction part 82. Since a support base 84 is provided inside the dust suction housing 81 and separated by the support base 84, the dust cannot enter the body main body 1. Since the dust suction port 83 is arranged higher than the storage chamber 85, when the dust is sucked from the spiral dust suction part 82, the dust will automatically fall and converge in the storage chamber 85 under the action of gravity. In the default state, the sealing cover 86 is in the closed state, and the outward convex buckle 15 is arranged in the inward concave clamping groove 16. Since a first spring 812 is provided between the button switch 87 and the outer wall of the dust suction housing 81, the button switch 87 can only rotate when an external force presses the button switch 87. When it is necessary to pour out the dust, press the button switch 87, and the button switch 87 rotates relative to the dust suction housing 81, and the outward convex buckle 15 disengages from the inward concave clamping groove 16, and the sealing cover 86 automatically pops open under the action of the torsion spring 811. When it is necessary to close the sealing cover 86, rotate the sealing cover 86 so that the inward concave clamping groove 16 is re-mated and locked with the outward convex buckle 15.

[0049] When the working head assembly is the air blowing working head 9, the operation is mainly carried out by installing an external air outlet part on the air blowing housing 91. The external air outlet part is not drawn in the attached drawings, and there is a protrusion on the external air outlet part. When it is necessary to install the external air outlet part, first axially press the locking seat 92, so that the arc-shaped step 96 will be misaligned relative to the arc-shaped clamping groove 97. Then push the external air outlet part into the sleeve of the air blowing housing 91, so that the protrusion of the external air outlet part will be stuck in the arc-shaped clamping groove 97. Then release the locking seat 92, and the locking seat 92 axially moves under the action of the second spring 93, and the arc-shaped step 96 on the locking seat 92 moves and is stuck outside the protrusion of the external air outlet part, so that the external air outlet part can be firmly installed on the air blowing housing 91. There is a second protrusion 95 on the locking seat 92. Rotate the locking seat 92 so that the second protrusion 95 is stuck in the second clamping groove 94. Since the end of the second spring 93 abuts against the arc-shaped step 96, the locking seat 92 will not disengage from the air blowing housing 91.

[0050] The specific embodiments described in the text are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A multifunctional blowing and suction electric tool with a replaceable working head, comprising a body (1), characterized in that: The two ends of the fuselage main body (1) are respectively provided with a working head assembly and a cover body (2) which are snap-connected thereto, and either end of the fuselage main body (1) can be adapted to install the working head assembly and the cover body (2); a handle assembly (3) which is rotatably connected thereto is provided below the fuselage main body (1), and a locking switch (4) for locking the handle assembly (3) is provided on the side of the fuselage main body (1); a driving motor (5) having a blowing and suction function is provided inside the fuselage main body (1), and the two ends of the driving motor (5) are respectively arranged toward the working head assembly and the cover body (2).

2. The multifunctional blowing and suction electric tool with replaceable working head according to claim 1, characterized in that: The working head assembly comprises a spray working head (6), a bladeless fan working head (7), a dust collecting working head (8) and an air blowing working head (9); the spray working head (6), the bladeless fan working head (7), the dust collecting working head (8) and the air blowing working head (9) are all provided with a limiting card slot (10) for positioning installation, and the cover body (2) is also provided with a limiting card slot (10) for positioning installation; and the two opening ends of the fuselage main body (1) are both provided with a limiting protrusion (11) for positioning installation, and the limiting protrusion (11) is rotatably installed in the limiting card slot (10).

3. The multifunctional blowing and suction electric tool with replaceable working head according to claim 2, characterized in that: A handle assembly (3) rotatably connected to the body (1) is provided below the body (1), and a mounting hole (12) for mounting a locking switch (4) is provided on a side of the body (1); the handle assembly (3) comprises a handle body (31) and a limit rotation block (32), and the handle body (31) and the limit rotation block (32) are respectively arranged inside and outside the body (1); a fastener (33) for fixing the limit rotation block (32) and the handle body (31) is provided between the limit rotation block (32) and the handle body (31), and the limit rotation block (32) and the handle body (31) are both rotatably connected to the body (1); a first locking groove (13) is provided on the locking switch (4), and a plurality of first protrusions (14) for locking are provided on the limit rotation block (32); the first protrusions (14) are arranged in the first locking groove (13), and the outer contours of the first protrusions (14) and the first locking groove (13) match each other.

4. The multifunctional blowing and suction electric tool with replaceable working head according to claim 2, characterized in that: The spray working head (6) comprises a spray housing (61), a nozzle assembly (62), an air volume adjustment assembly (63) and a spray volume adjustment assembly (64); the spray housing (61) and the main body (1) are snap-connected; an air bag (65) is provided above the spray housing (61); a material storage bag (66) is provided in a cavity surrounded by the air bag (65); the material storage bag (66) and the nozzle assembly (62) are in communication with each other; the air volume adjustment assembly (63) is fixedly mounted on the spray housing (61) and the nozzle assembly (62) is connected to the spray volume adjustment assembly (64); The working head (6) is connected to the air bag (65), and when the driving motor (5) is in operation, gas enters the air bag (65) from the air volume adjustment component (63); the nozzle component (62) comprises a nozzle mounting seat (621), and a discharge port (622) and a valve needle (623) that can be extended relative to the discharge port (622) are provided in the nozzle mounting seat (621); when the paint in the storage bag (66) enters the nozzle mounting seat (621), the paint squeezes the valve needle (623) to open the discharge port (622).

5. The multifunctional blowing and suction electric tool with replaceable working head according to claim 4, characterized in that: The nozzle mounting seat (621) is snap-fitted onto the spray housing (61); the spray quantity adjustment assembly (64) comprises an adjustment knob (641) and an eccentric cam (642); when the adjustment knob (641) is rotated, the eccentric cam (642) is driven to rotate; the outer sleeve of the valve needle (623) is provided with a return spring (67), and the eccentric cam (642) is arranged toward the end of the valve needle (623); a sliding member (68) slidably connected thereto is provided inside the spray housing (61), one end of the valve needle (623) is mounted on the nozzle mounting seat (621), and the other end of the valve needle (623) is mounted on the sliding member (68).

6. The multifunctional blowing and suction electric tool with replaceable working head according to claim 2, characterized in that: The bladeless fan working head (7) comprises a fan casing (71) and an air outlet frame (72); the fan casing (71) and the fuselage main body (1) are snap-connected, and the fan casing (71) and the air outlet frame (72) are in electrical communication with each other; and an annular air outlet (73) is provided at the edge of the air outlet frame (72).

7. The multifunctional blowing and suction electric tool with replaceable working heads according to claim 6, characterized in that: A control circuit board (74) is provided in the fan housing (71), and an annular light strip (75) is provided on the front end surface of the air outlet frame (72); the annular light strip (75) and the control circuit board (74) are electrically connected.

8. The multifunctional blowing and suction electric tool with replaceable working head according to claim 2, characterized in that: The dust collecting working head (8) comprises a dust collecting shell (81), wherein a spiral dust collecting member (82) is arranged inside the dust collecting shell (81); a dust collecting port (83) is arranged at an open end near the top of the dust collecting shell (81), and the dust collecting port (83) and the spiral dust collecting member (82) are communicated with each other; a supporting base (84) is arranged at the end of the spiral dust collecting member (82), and when the dust collecting shell (81) and the machine body (1) are snap-connected, the supporting base (84) abuts against the open end of the machine body (1); a material storage chamber (85) is arranged below the spiral dust collecting member (82), and a sealing cover (86) rotatably connected to the material storage chamber (85) is arranged on the material storage chamber (85), and a button switch (87) for locking the sealing cover (86) is arranged on the dust collecting shell (81).

9. The multifunctional blowing and suction electric tool with replaceable working heads according to claim 8, characterized in that: A one-way spring sheet (88) is provided between the dust suction port (83) and the spiral dust suction member (82), and the edge of the one-way spring sheet (88) is fixedly mounted on the inner wall of the dust suction shell (81); a limiting step (89) is provided inside the dust suction shell (81), and the spiral dust suction member (82) abuts against the limiting step (89); a pivoting shaft (810) is provided between the sealing cover (86) and the dust suction shell (81), and a torsion spring (811) for resetting is provided between the pivoting shaft (810) and the dust suction shell (81), and the torsion spring (811) is sleeved and mounted on the pivoting shaft (810); a button is provided below the dust suction shell (81) and is rotatably connected to the dust suction shell (81). A switch (87), wherein a first spring (812) is arranged between the button switch (87) and the outer wall of the dust collecting housing (81); an outer convex buckle (15) is arranged on the edge of the button switch (87), and an inner concave buckle groove (16) is arranged on the sealing cover (86); when the sealing cover (86) is in a closed state, the outer convex buckle (15) is arranged in the inner concave buckle groove (16); the outer convex buckle (15) and the first spring (812) are arranged on both sides of the rotating shaft of the button switch (87), respectively; and a filter mesh layer (813) is arranged between the end of the spiral dust collecting member (82) and the supporting base (84), and when the driving motor (5) is working, gas diffuses along the filter mesh layer (813).

10. The multifunctional blowing and suction electric tool with replaceable working head according to claim 2, characterized in that: The air blowing working head (9) comprises an air blowing shell (91), the air blowing shell (91) is provided with a locking seat (92) connected thereto by snapping, a second spring (93) is provided between the locking seat (92) and the air blowing shell (91); the air blowing shell (91) is connected to the body (1) by snapping, a second slot (94) is provided on the shaft sleeve of the air blowing shell (91), and a plurality of second protrusions (95) are provided on the locking seat (92); when the locking seat (92) is mounted on the shaft sleeve of the air blowing shell (91), the second protrusions (95) are The air blowing housing (91) is clamped in the second clamping groove (94); a second spring (93) is provided on the shaft sleeve of the air blowing housing (91), and the end of the second spring (93) abuts against the locking seat (92); an arc-shaped step (96) is provided on the locking seat (92), and the end of the second spring (93) abuts against the arc-shaped step (96); an arc-shaped clamping groove (97) for mounting an external air outlet part is provided on the shaft sleeve of the air blowing housing (91), and when the locking seat (92) is pressed axially, the arc-shaped step (96) is displaced relative to the arc-shaped clamping groove (97).

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