A blowing and suction safety conversion device for a blowing and suction machine

Abstract

The present invention discloses a blowing and suction safety conversion device of a blowing and suction machine, comprising a blowing and suction machine casing, a blowing and suction conversion component, a rotating ring, a casing cover, a switch assembly, and a limiting assembly. The rotating ring is provided with a triangular protrusion and a limiting groove, the rotating ring is rotatably matched with a mounting ring, the casing cover is provided with a convex ring, the convex ring is matched with the mounting ring and limits the rotating ring, the blowing and suction conversion component is inserted into the convex ring and rotatably matched with the rotating ring, the switch assembly is provided with a switch push button, the blowing and suction conversion component passes through the limiting groove and conflicts with the switch push button in the circuit-connected position, and the switch push button is separated from the blowing and suction conversion component in the circuit-disconnected position, the limiting assembly is detachably connected to the blowing and suction machine casing, the limiting assembly is provided with a V-shaped protrusion and a front limiting block, and when the circuit-connected position is converted to the circuit-disconnected position, the front limiting block is engaged with the blowing and suction conversion component and forms a removal buffer position. The present invention has a removal buffer position, thereby achieving the effect of extending the conversion operation time.

Description

Technical Field

[0001] The invention relates to the field of garden tools, in particular to a blowing and suction safety conversion device of a blowing and suction machine. Background Art

[0002] The blower-suction machine is a blower-suction machine that integrates the functions of blowing and suction. Generally, the blower-suction machine has two modes. When the blower-suction machine is in the blowing mode, the high-speed airflow blown out from the blowing pipe will blow the leaves scattered on the ground together; when the blower-suction machine is in the suction mode, the suction airflow is formed to suck the leaves and dust on the ground into the collection device to complete the cleaning of the leaves on the ground. When switching from the blowing mode to the suction mode, the blowing and suction pipe devices need to be replaced to achieve this. When replacing the blowing and suction devices, the motor and fan will be exposed to the outside without any protection. If the motor and fan are still running at this time, the user accidentally touches them, and the consequences will be disastrous.

[0003] With the popularization of mechanization, more and more users use blowing and sucking machines to replace manual actions. In order to improve the safety of machine use, most conversion structures in the market use knobs or screws to extend the operation time of users replacing the blowing and sucking devices. However, the conversion structure is simple in design and easy to disassemble. Due to the simple design of the structure and easy disassembly, it is easy to replace the machine before it stops or fails to stop completely, resulting in the phenomenon of the machine injuring people. Some conversion structures are complex in design and inconvenient to operate.

[0004] Therefore, it is necessary to design a blowing-suction safety conversion device for a blowing-suction machine that has a simple structure, is easy to operate and safe to use. Summary of the invention

[0005] The present invention aims at the defects of the blowing-suction safety conversion device in the prior art, such as simple design, easy disassembly or inconvenient operation, and provides a new blowing-suction safety conversion device for a blowing-suction machine.

[0006] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0007] A blowing and suction safety conversion device for a blowing and suction machine, comprising a blowing and suction machine casing and a blowing and suction conversion component, wherein the blowing and suction conversion component is an air inlet hood or an air suction pipe, the air inlet hood cooperates with the blowing and suction machine casing to form a blowing mode, and the air suction pipe cooperates with the blowing and suction machine casing to form a suction mode, and also comprises a rotating ring, a casing cover, a switch assembly, a limiting assembly, and a tension spring, the blowing and suction machine casing is provided with a mounting ring, the rotating ring is provided with a triangular protrusion and a limiting groove, the rotating ring is rotatably matched with the mounting ring, the two ends of the tension spring are respectively fixed on the blowing and suction machine casing and the rotating ring, the casing cover is detachably matched with the blowing and suction machine casing, the casing cover is provided with a convex ring, the convex ring cooperates with the mounting ring and limits the rotating circle, the blowing and suction conversion component is inserted into the convex ring and In cooperation with the rotation of the rotating circle, the switch assembly is inserted into the casing of the blowing and sucking machine. The switch assembly is provided with a switch push button, which cooperates with the blowing and sucking conversion component to form a circuit-on position or a circuit-off position. In the circuit-on position, the blowing and sucking conversion component passes through the limiting groove and conflicts with the switch push button, and in the circuit-off position, the switch push button is disengaged from the blowing and sucking conversion component. The limit assembly is detachably connected to the casing of the blowing and sucking machine. The limit assembly is provided with a V-shaped protrusion and a front limit block, which conflicts with the triangular protrusion. When the circuit-on position is converted to the circuit-off position, the V-shaped protrusion pushes the rotating circle to rotate counterclockwise, and the front limit block is engaged with the blowing and sucking conversion component to form a dismantling buffer position.

[0008] In the above-mentioned blowing and sucking safety conversion device of the blowing and sucking machine, the blowing and sucking conversion component is detachably connected to the casing of the blowing and sucking machine, and the blowing and sucking conversion component has two forms of an air inlet hood or a suction pipe and corresponds to the two modes of the blowing and sucking machine respectively. In the process of switching between the blowing mode and the suction mode, the rotating circle, the casing cover, the switch assembly, the limit assembly, and the tension spring jointly play the role of extending the switching operation time, so that the blowing and sucking machine has sufficient stopping time, thereby avoiding the inertial rotation of the blowing and sucking machine after the power is cut off and injuring people, thereby improving the safety of the use of the blowing and sucking machine.

[0009] Among them, the switch component controls the on and off of the circuit, and the switch push button is linked to the switch component. When the blowing and sucking conversion component is installed and pressed against the switch push button, the present invention forms a circuit-connected position, and the blowing and sucking machine works normally. When the blowing and sucking conversion component is removed and separated from the switch push button, the present invention forms a circuit-disconnected position, and the blowing and sucking machine stops working.

[0010] The rotating ring is mounted on the mounting ring of the blowing and suction machine housing. When the circuit is connected, it can limit the blowing and suction conversion component. It can also rotate around its own center to produce relative rotation with the blowing and suction machine housing. The limit assembly and the tension spring jointly limit the rotation angle of the rotating ring. The V-shaped protrusion of the limit assembly conflicts with the triangular protrusion of the rotating ring, which promotes the rotating ring to rotate counterclockwise. When the V-shaped protrusion pushes the rotating ring to rotate counterclockwise to a certain angle, the front limit block engages with the blowing and suction conversion component. At this time, the blowing and suction conversion component is still stuck in the blowing and suction machine housing and cannot be removed. That is, the present invention forms a removal buffer position, thereby achieving the effect of extending the conversion operation time.

[0011] When the front limit block is separated from the blowing-suction conversion component, the blowing-suction conversion component can be removed from the blowing-suction machine casing, and the tension spring plays the role of resetting the rotating circle, making it convenient to install the blowing-suction conversion component again.

[0012] The convex ring on the casing cover cooperates with the mounting ring on the casing of the blower-vacuum machine, thereby limiting the rotating circle to a preset position to prevent the rotating circle from detaching, and also protecting the casing of the blower-vacuum machine.

[0013] Preferably, in the above-mentioned blowing and sucking safety conversion device of a blowing and sucking machine, the convex ring is evenly provided with first limiting grooves, the mounting ring is evenly provided with second limiting grooves, the positions of the first limiting groove, the second limiting groove and the limiting groove are all aligned, and the side of the blowing and sucking conversion component is provided with an L-shaped limiting portion and a square limiting portion, the square limiting portion passes through the first limiting groove, the second limiting groove and is limited by the second limiting groove, and the L-shaped limiting portion passes through the first limiting groove, the second limiting groove and interferes with the switch push button.

[0014] The first limiting groove, the second limiting groove and the limiting groove are aligned so that the blowing and suction conversion component can be smoothly inserted into the blowing and suction machine housing, and at the same time play a guiding and limiting role for the L-shaped limiting part and the square limiting part. Under the action of the tension spring, the first limiting groove and the second limiting groove of the rotating ring are staggered, thereby achieving the function of limiting the blowing and suction conversion component.

[0015] Preferably, in the above-described blowing and suction safety conversion device of a blowing and suction machine, the head of the switch push button has a first clamping portion, a second clamping portion, and a third clamping portion, and one end of the L-shaped limiting portion is an arc surface, and the second clamping portion cooperates with the arc surface in the circuit-connected position, and the first clamping portion and the third clamping portion jointly interfere with the rotating circle in the circuit-disconnected position.

[0016] The second clamping portion cooperates with the arc surface to quickly and smoothly switch the circuit position. The first clamping portion and the third clamping portion jointly interfere with the rotating circle, which can better limit the switch push button in the circuit disconnection position, thereby ensuring the safety of the present invention.

[0017] Preferably, in the above-mentioned blowing-suction safety conversion device of a blowing-suction machine, a square opening is provided on the blowing-suction conversion component, and the square opening cooperates with the front limit block.

[0018] The square opening cooperates with the front limit block to better limit the blowing and suction conversion component, so that the present invention can smoothly enter the removal buffer position, thereby achieving the effect of extending the conversion operation time.

[0019] Preferably, in the above-described blowing-suction safety conversion device of a blowing-suction machine, the limiting grooves are evenly distributed on the rotating circle, and the limiting grooves are provided with barbs, and the barbs respectively limit the L-shaped limiting portion and the square limiting portion in the circuit-connected position.

[0020] The barb structure on the limiting groove can cooperate with the second limiting groove of the blowing and sucking machine housing to clamp the L-shaped limiting part and the square limiting part, so that the installation of the blowing and sucking conversion component in the circuit-connected position is more stable.

[0021] Preferably, in the above-mentioned blowing-suction safety conversion device of a blowing-suction machine, a limiting rib is provided on the casing of the blowing-suction machine, and when the rotating circle rotates clockwise to a maximum angle, the limiting rib contacts the rotating circle and limits the rotating circle.

[0022] The tension spring drives the rotating ring to rotate clockwise, and the limiting rib limits the maximum angle of the clockwise rotation of the rotating ring.

[0023] Preferably, in the above-described blowing and sucking safety conversion device of a blowing and sucking machine, the limit assembly includes a fixed seat and a limit push button, the fixed seat is detachably connected to the casing of the blowing and sucking machine, the limit push button is slidably matched with the fixed seat, a first gear position groove and a second gear position groove are provided on both sides of the limit push button, and two studs are provided on the casing cover, and the studs are respectively located on both sides of the limit push button, the studs are engaged with the first gear position groove in the circuit connection position, and the studs are engaged with the second gear position groove in the removal buffer position.

[0024] The fixing seat plays the role of fixing the limit assembly, and the outer contours on both sides of the limit push button are provided with corresponding first gear grooves and second gear grooves. The two studs of the casing cover cooperate with the limit push button to form two positions, which respectively correspond to the circuit connection position and the buffer removal position of the present invention, making the blowing and suction mode conversion of the blowing and suction machine more operational and simpler.

[0025] Preferably, in the above-described blowing-suction safety conversion device of a blowing-suction machine, a first U-shaped limit block is provided on the fixed seat, and a second U-shaped limit block is provided on the limit push button, and the first U-shaped limit block respectively cooperates with the second U-shaped limit block and the V-shaped protrusion to limit the limit push button.

[0026] The first U-shaped limit block cooperates with the second U-shaped limit block to limit the maximum distance the limit push button slides forward, and the first U-shaped limit block cooperates with the V-shaped protrusion to limit the maximum distance the limit push button slides backward.

[0027] Preferably, in the above-mentioned blowing-suction safety conversion device of a blowing-suction machine, a card slot is provided on the casing of the blowing-suction machine, and the switch assembly cooperates with the card slot.

[0028] The card slot can better limit the switch component to a preset position, ensuring that the switching action of the switch component is effective.

[0029] Preferably, in the above-mentioned blowing-suction safety conversion device of a blowing-suction machine, a reset spring is further provided on the switch assembly, and two ends of the reset spring respectively contact with the switch push button and the card slot.

[0030] The return spring is used to push the switch push button so that the switch push button automatically closes the circuit after the blowing and suction conversion component is removed.

[0031] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0032] 1. The overall structure of the present invention is simple, and the installation operation of the blowing and suction conversion component is very convenient. During installation, it is only necessary to align the L-shaped limiting part and the square limiting part of the blowing and suction conversion component with the second limiting groove of the blowing and suction machine casing and press down to complete the installation.

[0033] 2. The present invention is provided with a dismantling buffer position, which serves to extend the switching operation time, so that the blowing and sucking machine has sufficient stopping time. When the blowing and sucking conversion component is dismantled, it is necessary to push the second gear groove of the limit push button to the stud position and engage it. At this time, the blowing and sucking conversion component is pulled up to form the dismantling buffer position, and at the same time, the L-shaped limit part is separated from the switch push button, the switch component disconnects the circuit, and the machine stops operating. The circuit is automatically disconnected during the dismantling operation to ensure the safety of the operation.

[0034] 3. If the blowing and suction conversion component needs to be completely moved out of the blowing and suction machine casing, you only need to keep pulling up the blowing and suction conversion component, and then pull the first gear groove of the limit push button back to the stud position and engage it, so that the blowing and suction conversion component can be completely moved out of the blowing and suction machine casing, thereby extending the operator's operating time for switching between different working modes of the blowing and suction machine, allowing the machine to have sufficient stop time, reducing the occurrence of machine injuries and improving the safety of machine use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an exploded diagram of the present invention in the blowing mode;

[0036] Figure 2 It is a schematic diagram of the structure of the present invention in the air suction mode;

[0037] Figure 3 It is a schematic diagram of the structure of the hidden housing cover in the present invention;

[0038] Figure 4 The structure diagram of the present invention is to hide the housing cover in the blowing mode Figure 1 ;

[0039] Figure 5 The structure diagram of the present invention is to hide the housing cover in the blowing mode Figure 2 ;

[0040] Figure 6 It is a schematic diagram of the structure of the present invention in which the casing cover is hidden when the buffer position is removed;

[0041] Figure 7 It is a structural schematic diagram of the limit push button in the present invention;

[0042] Figure 8 It is a structural schematic diagram of the air inlet cover in the present invention;

[0043] Fig. 9 It is a schematic diagram of the structure of the air suction pipe in the present invention;

[0044] Fig.10 It is a schematic diagram of the structure of the switch push button in the present invention; DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-10 The present invention is further described in detail with specific embodiments, but they are not intended to limit the present invention:

[0046] Example 1

[0047] A blowing and suction safety conversion device for a blowing and suction machine, comprising a blowing and suction machine casing 4, a blowing and suction conversion component 1, wherein the blowing and suction conversion component 1 is an air inlet hood or an air suction pipe, the air inlet hood cooperates with the blowing and suction machine casing 4 to form a blowing mode, and the air suction pipe cooperates with the blowing and suction machine casing 4 to form a suction mode, and further comprises a rotating circle 5, a casing cover 2, a switch assembly 3, a limiting assembly 6, and a tension spring 7. The blowing and suction machine casing 4 is provided with a mounting ring 41, the rotating circle 5 is provided with a triangular protrusion 51 and a limiting groove 52, the rotating circle 5 is rotatably matched with the mounting ring 41, the two ends of the tension spring 7 are respectively fixed on the blowing and suction machine casing 4 and the rotating circle 5, the casing cover 2 is detachably matched with the blowing and suction machine casing 4, the casing cover 2 is provided with a convex ring 21, the convex ring 21 cooperates with the mounting ring 41 and limits the rotating circle 5, and the blowing and suction conversion component 1 is inserted into the convex ring 21 And it rotates with the rotating circle 5, the switch assembly 3 is stuck in the blowing and suction machine casing 4, and the switch assembly 3 is provided with a switch push button 31, and the switch push button 31 cooperates with the blowing and suction conversion component 1 to form a circuit connection position or a circuit disconnection position. In the circuit connection position, the blowing and suction conversion component 1 passes through the limiting groove 52 and conflicts with the switch push button 31, and in the circuit disconnection position, the switch push button 31 is disengaged from the blowing and suction conversion component 1, and the limit assembly 6 is detachably connected to the blowing and suction machine casing 4, and the limit assembly 6 is provided with a V-shaped protrusion 64 and a front limit block 63, and the V-shaped protrusion 64 conflicts with the triangular protrusion 51. When the circuit connection position is converted to the circuit disconnection position, the V-shaped protrusion 64 pushes the rotating circle 5 to rotate counterclockwise, and the front limit block 63 is engaged with the blowing and suction conversion component 1 to form a dismantling buffer position.

[0048] When installing the air inlet hood or the air suction duct, it is only necessary to insert the air inlet hood or the air suction duct into the convex ring 21, the mounting ring 41, and the limiting groove 52 in sequence, and push the switch button 31 to the circuit-connecting position to turn on the blowing mode or the suction mode, which is convenient to operate.

[0049] When the air inlet hood needs to be removed, first push the limit assembly 6, and at the same time the V-shaped protrusion 64 pushes the triangular protrusion 51, so that the rotating circle 5 rotates counterclockwise, and the limiting groove 52 releases the limit on the air inlet hood. Then the operator pulls up the air inlet hood, and the switch push button 31 disengages from the blowing and suction conversion component 1, thereby disconnecting the circuit. At the same time, the front limit block 63 engages with the blowing and suction conversion component 1 to form a removal buffer position. Finally, the operator pulls back the limit assembly 6, so that the front limit block 63 disengages from the blowing and suction conversion component 1, and the blowing and suction conversion component 1 is successfully removed from the blowing and suction machine housing 4.

[0050] Preferably, the convex ring 21 is evenly provided with first limiting grooves 211, and the mounting ring 41 is evenly provided with second limiting grooves 411, and the positions of the first limiting grooves 211, the second limiting grooves 411, and the limiting grooves 52 are aligned, and the side of the blowing and sucking conversion component 1 is provided with an L-shaped limiting portion 11 and a square limiting portion 12, and the square limiting portion 12 passes through the first limiting groove 211 and the second limiting groove 411 and is limited by the second limiting groove 411, and the L-shaped limiting portion 11 passes through the first limiting groove 211 and the second limiting groove 411 and conflicts with the switch button 31.

[0051] Preferably, the head of the switch push button 31 has a first clamping portion 311, a second clamping portion 312, and a third clamping portion 313, one end of the L-shaped limit portion 11 is an arc surface 111, and the second clamping portion 312 cooperates with the arc surface 111 in the circuit-connected position, and the first clamping portion 311 and the third clamping portion 313 jointly contact the rotating circle 5 in the circuit-disconnected position.

[0052] Preferably, a square opening 13 is provided on the blowing-suction conversion component 1 , and the square opening 13 cooperates with the front limit block 63 .

[0053] Preferably, the limiting grooves 52 are evenly distributed on the rotating circle 5 , and barbs 53 are provided on the limiting grooves 52 . The barbs 53 limit the L-shaped limiting portion 11 and the square limiting portion 12 respectively in the circuit-connected position.

[0054] Preferably, a limiting rib 42 is provided on the blower housing 4 , and when the rotating circle 5 rotates clockwise to a maximum angle, the limiting rib 42 abuts against the rotating circle 5 and limits the rotating circle 5 .

[0055] Preferably, the limit assembly 6 includes a fixed seat 62 and a limit push button 61. The fixed seat 62 is detachably connected to the blower housing 4. The limit push button 61 is slidably matched with the fixed seat 62. A first gear groove 613 and a second gear groove 612 are provided on both sides of the limit push button 61. Two studs 22 are provided on the housing cover 2. The studs 22 are respectively located on both sides of the limit push button 61. The studs 22 are engaged with the first gear groove 613 in the circuit-connected position, and the studs 22 are engaged with the second gear groove 612 in the dismantling buffer position.

[0056] Preferably, a first U-shaped limit block 622 is provided on the fixing seat 62, and a second U-shaped limit block 611 is provided on the limit push button 61. The first U-shaped limit block 622 cooperates with the second U-shaped limit block 611 and the V-shaped protrusion 64 respectively to limit the limit push button 61.

[0057] Preferably, a slot 43 is provided on the housing 4 of the blower-vacuum machine, and the switch assembly 3 cooperates with the slot 43 .

[0058] Preferably, a return spring 32 is further provided on the switch assembly 3 , and two ends of the return spring 32 are in contact with the switch push button 31 and the slot 43 respectively.

[0059] When the blower-vacuum machine is switched from the blowing mode to the suction mode, the operator needs to remove the air inlet hood from the blower-vacuum machine casing 4 and install the suction pipe. The operating steps for removing the air inlet hood are as follows: Step 1, push the limit push button 61, that is, the V-shaped protrusion 64 pushes the triangular protrusion 51, and overcomes the tension of the tension spring 7 to make the rotating circle 5 rotate counterclockwise, and the hook 53 also releases the limit of the L-shaped limit part 11, and continues to push the limit push button 61 until the second gear groove 612 is engaged with the stud 22. At this time, the front limit block 63 is inserted into the square opening 13; Step 2, the operator pulls up the air inlet hood until the front limit block 63 conflicts with the square opening 13, and the air inlet hood cannot continue to move up, that is, a removal buffer position is formed. At this time, the arc surface 111 is disengaged from the second clamping part 312, and the first clamping part 311 and the third clamping part 313 jointly conflict with the side of the rotating circle 5, and the circuit is disconnected. Step three, the operator pulls back the limit push button 61 until the first gear groove 613 engages with the stud 22, and the front limit block 63 disengages from the square opening 13, and then continues to pull up the air inlet hood to completely remove the air inlet hood. At this time, the rotating ring 5 rotates clockwise and resets under the action of the tension spring 7, so that the positions of the first limit groove 211, the second limit groove 411, and the limiting groove 52 are all aligned.

[0060] The steps for installing the air suction duct are as follows: the operator aligns the L-shaped limiting portion 11 and the square limiting portion 12 of the air suction duct with the first limiting groove 211 of the casing cover 2, and then presses the air suction duct down until the arc surface 111 contacts the second clamping portion 312, thereby connecting the circuit and completing the installation.

[0061] When the blower-suction machine is switched from the suction and blowing mode to the blowing mode, the operator needs to remove the suction pipe from the blower-suction machine housing 4 and install the air inlet hood. The operation of removing the suction pipe is the same as the above-mentioned operation of removing the air inlet hood, and the operation of installing the air inlet hood is the same as the above-mentioned operation of installing the suction pipe.

[0062] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A blowing-suction safety conversion device for a blowing-suction machine, comprising a blowing-suction machine housing (4) and a blowing-suction conversion component (1), wherein the blowing-suction conversion component (1) is an air inlet hood or an air suction pipe, wherein the air inlet hood cooperates with the blowing-suction machine housing (4) to form a blowing mode, and the air suction pipe cooperates with the blowing-suction machine housing (4) to form a suction mode, wherein: The device further comprises a rotating ring (5), a housing cover (2), a switch assembly (3), a limiting assembly (6), and a tension spring (7); a mounting ring (41) is provided on the housing (4) of the blower and vacuum machine; a triangular protrusion (51) and a limiting groove (52) are provided on the rotating ring (5); the rotating ring (5) and the mounting ring (41) are rotatably matched; two ends of the tension spring (7) are respectively fixed on the housing (4) of the blower and vacuum machine and the rotating ring (5); the housing cover (2) and the housing (4) of the blower and vacuum machine are detachably matched; a convex ring (21) is provided on the housing cover (2); the convex ring (21) cooperates with the mounting ring (41) and limits the rotating ring (5); the blow-suction conversion component (1) is inserted into the convex ring (21) and rotatably matched with the rotating ring (5); the switch assembly (3) is inserted into the housing (4) of the blower and vacuum machine; the switch assembly (3) A switch push button (31) is provided on the upper part, and the switch push button (31) cooperates with the blowing and suction conversion component (1) to form a circuit-on position or a circuit-off position. In the circuit-on position, the blowing and suction conversion component (1) passes through the limiting groove (52) and contacts the switch push button (31). In the circuit-off position, the switch push button (31) is separated from the blowing and suction conversion component (1). The limit assembly (6) is detachably connected to the blowing and suction machine housing (4). The limit assembly (6) is provided with a V-shaped protrusion (64) and a front limit block (63). The V-shaped protrusion (64) contacts the triangular protrusion (51). When the circuit-on position is converted to the circuit-off position, the V-shaped protrusion (64) pushes the rotating circle (5) to rotate counterclockwise, and the front limit block (63) is engaged with the blowing and suction conversion component (1) to form a removal buffer position. The convex ring (21) is evenly provided with first limiting grooves (211), the mounting ring (41) is evenly provided with second limiting grooves (411), the positions of the first limiting grooves (211), the second limiting grooves (411) and the limiting groove (52) are all aligned, and the side surface of the blowing and sucking conversion component (1) is provided with an L-shaped limiting portion (11) and a square limiting portion (12), the square limiting portion (12) passes through the first limiting groove (211) and the second limiting groove (411) and is limited by the second limiting groove (411), and the L-shaped limiting portion (11) passes through the first limiting groove (211) and the second limiting groove (411) and contacts the switch push button (31); The head of the switch push button (31) comprises a first clamping portion (311), a second clamping portion (312), and a third clamping portion (313); one end of the L-shaped limiting portion (11) is an arc surface (111); in the circuit-connecting position, the second clamping portion (312) cooperates with the arc surface (111); in the circuit-disconnecting position, the first clamping portion (311) and the third clamping portion (313) jointly abut against the rotating circle (5); The blowing and suction conversion component (1) is provided with a square opening (13), and the square opening (13) cooperates with the front limit block (63); The limiting grooves (52) are evenly distributed on the rotating circle (5), and the limiting grooves (52) are provided with barbs (53), and the barbs (53) respectively limit the L-shaped limiting portion (11) and the square limiting portion (12) in the circuit-connected position; The limit assembly (6) comprises a fixing seat (62) and a limit push button (61); the fixing seat (62) is detachably connected to the housing (4) of the blowing and suction machine; the limit push button (61) and the fixing seat (62) are slidably matched; a first gear groove (613) and a second gear groove (612) are provided on both sides of the limit push button (61); two studs (22) are provided on the housing cover (2); the studs (22) are respectively located on both sides of the limit push button (61); in the circuit connection position, the studs (22) are engaged with the first gear groove (613); in the removal buffer position, the studs (22) are engaged with the second gear groove (612).

2. The blowing and suction safety conversion device of the blowing and suction machine according to claim 1, characterized in that: The housing (4) of the blower and suction machine is provided with a limiting rib (42), and when the rotating circle (5) rotates clockwise to a maximum angle, the limiting rib (42) abuts against the rotating circle (5) and limits the rotating circle (5).

3. The blowing and suction safety conversion device of the blowing and suction machine according to claim 1, characterized in that: The fixing seat (62) is provided with a first U-shaped limit block (622), the limit push button (61) is provided with a second U-shaped limit block (611), and the first U-shaped limit block (622) cooperates with the second U-shaped limit block (611) and the V-shaped protrusion (64) respectively to limit the limit push button (61).

4. The blowing and suction safety conversion device of the blowing and suction machine according to claim 1, characterized in that: A card slot (43) is provided on the housing (4) of the blower and suction machine, and the switch assembly (3) cooperates with the card slot (43).

5. The blowing and suction safety conversion device of the blowing and suction machine according to claim 4, characterized in that: The switch assembly (3) is also provided with a return spring (32), and two ends of the return spring (32) respectively contact the switch push button (31) and the clamping slot (43).

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