A hand-pushed leaf vacuum machine with automatic power-off function when dumping

Abstract

The present invention discloses a hand-push leaf vacuum machine with an automatic power-off function when tilting, wherein the height of the fan blades is in the middle of the height direction of the dust box, the lower surface of the dust box is close to the ground, the lower end of the air inlet channel is close to the ground, and the upper end of the air outlet channel is connected to the side top of the dust box. At this time, the overall length of the air inlet channel and the air outlet channel is relatively short, which is beneficial to improving the wind strength in the air duct; at the same time, because the lower end of the air inlet channel is close to the ground, if the motor in the air duct is touched, the casing needs to be tilted backward so that the two supporting legs and the push handle are supported on the ground. At this time, the wheel axle slides to the bottom of the movable groove under the action of gravity, and the micro switch is in a power-off state at this time; or the casing needs to be tilted toward both sides, and the force on the wheel axle disappears after the casing is tilted, and the micro switch is also in a power-off state at this time, thereby finally realizing the automatic power-off function when tilting; at the same time, when the hand-push leaf vacuum machine is lifted up as a whole, the micro switch is also in a power-off state.

Description

Technical Field

[0001] The invention relates to the technical field of garden tools, in particular to a hand-push leaf vacuum with an automatic power-off function when dumped. Background Art

[0002] With the rapid development of economy, people's requirements for environment are also increasing. Therefore, greening is carried out in urban streets, parks, roads and other places to improve the environment. However, the fallen leaves produced by greening facilities need to be cleaned up in time, and the leaf suction machine can achieve the purpose of facilitating the cleaning of fallen leaves.

[0003] At present, a Chinese patent with application publication number CN109898453A and application publication date June 18, 2019 discloses an energy-saving and convenient garden leaf suction machine for handling sticky leaves, including an engine seat, a push frame, a leaf collecting box, walking wheels, a leaf suction fan, a leaf suction head, and a leaf removal device. The rear end surface of the engine seat is connected to the bottom end of the push frame by electric welding, and the push frame is fastened and connected to the top of the leaf collecting box by buckles. The two sides of the engine seat are fastened to the walking wheels, the front end surface of the engine seat is welded to the surface of one side of the leaf suction fan, and is electrically connected through a wire. The other side of the leaf suction fan is locked and connected to one end of the leaf suction head through a flange, and a leaf removal device is provided at the rear of the leaf suction head.

[0004] When the leaf suction fan in the above leaf suction machine is running, leaves pass through the leaf suction head and the leaf suction fan and then enter the leaf collecting box. When the leaf suction fan is running at the same power, the longer the passage between the leaf suction fan and the leaf collecting box, the more difficult it is to transport the leaves into the leaf collecting box; at this time, because the leaf collecting box of the above leaf suction machine is located behind the leaf suction machine, the passage between the leaf suction fan and the leaf collecting box is too long, thus affecting the use effect.

[0005] At the same time, when the leaf vacuum machine is in operation, the following situations may sometimes occur, causing safety problems: (1) When the operator leaves but does not turn off the equipment, a mentally ill person or a naughty child may sometimes push the leaf vacuum machine down, then reach into the suction machine and touch the blades of the leaf vacuum fan, causing safety problems; (2) Safety problems may arise due to failure to turn off the power during maintenance. Summary of the invention

[0006] The purpose of the present invention is to provide a hand-push leaf vacuum machine with an automatic power-off function when it is tilted over.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a hand-push leaf vacuum cleaner with an automatic power-off function when tilted, comprising a casing provided with an air duct, a fan arranged in the casing, a dust box, walking wheels arranged on both sides of the casing and supported on the ground, auxiliary wheels arranged on both sides of the casing and supported on the ground, and a push handle arranged on the rear end of the casing, the dust box being arranged at the front end of the casing and the lower surface close to the ground, the height of the fan blades of the fan being in the middle of the height direction of the dust box, the air duct comprising an air inlet channel having one end close to the ground and the other end connected to the fan blades of the fan, an air outlet channel having one end connected to the fan blades of the fan and the other end connected to the dust box, the air outlet channel being connected to the top of the side of the dust box close to the fan, and the two Auxiliary wheels are arranged on both sides of the lower end of the air inlet channel; a microswitch connected in series with the motor of the fan is arranged in the casing, and movable grooves are opened on both sides of the casing, and wheel axles with two ends passing through the movable grooves are movably arranged in the movable grooves, and two walking wheels are arranged at both ends of the wheel axles; a linkage mechanism is arranged in the casing, which is located between the wheel axle and the microswitch and realizes opening or closing the microswitch, and when the walking wheel and the auxiliary wheel are supported on the ground, the wheel axle slides to the top of the movable groove and drives the linkage mechanism to press the switch key of the microswitch to turn on the microswitch; two supporting legs are arranged at the rear end of the casing, and when the casing tilts backward so that the two supporting legs and the push handle are supported on the ground, the wheel axle slides to the bottom of the movable groove under the action of gravity.

[0008] By adopting the above scheme, the height of the fan blades is in the middle of the height direction of the dust box, and because the lower surface of the dust box is close to the ground, the lower end of the air inlet channel is close to the ground, and the upper end of the air outlet channel is connected to the top of the side of the dust box. At this time, the overall length of the air inlet channel and the air outlet channel is shorter, which is beneficial to increase the wind strength in the air duct; at the same time, the shorter length of the air inlet channel can increase the suction force of the fan, and the upper end of the air outlet channel is connected to the top of the side of the dust box to increase the storage capacity of the dust box, thereby achieving the effect of efficient leaf suction and increasing the amount of leaf collection. At the same time, because the lower end of the air inlet channel is close to the ground, if the motor in the air duct is touched, the casing needs to be tilted backward so that the two supporting legs and the push handle are supported on the ground. At this time, the wheel axle slides to the bottom of the movable groove under the action of gravity. At this time, the microswitch is in the power-off state, and the fan connected in series with the microswitch stops working; or the casing needs to be tilted toward both sides. When the walking wheels and auxiliary wheels are supported on the ground, the wheel axle is equivalent to being driven by the gravity of the entire leaf vacuum machine to drive the linkage mechanism to press the on / off key of the microswitch. At this time, the force on the wheel axle disappears after the casing tilts, and the microswitch is also in the power-off state, thus realizing the automatic power-off function of tilting; at the same time, when the hand-push leaf vacuum machine is lifted up as a whole, the microswitch is also in the power-off state.

[0009] The present invention is further configured as follows: the linkage mechanism includes a rotating sleeve rotatably connected to the casing, a pushing arm integrally provided on the rotating sleeve and abutting against the top of the wheel axle, and a pressing arm integrally provided on the rotating sleeve and used for pressing the switch key of the micro switch after rotation; when the wheel axle slides to the top of the movable groove, the wheel axle drives the pushing arm to rotate and drives the pressing arm to press the switch key of the micro switch.

[0010] By adopting the above scheme, when the walking wheels and auxiliary wheels are supported on the ground, the wheel axle is equivalent to being subjected to the force of the entire leaf vacuum machine. At this time, the wheel axle drives the pushing arm to rotate during the process of sliding to the top of the movable groove, thereby driving the pressing arm to press the switch of the micro switch through the rotating sleeve. When the micro switch is in the energized state, the fan can be turned on or off by its own switch.

[0011] The present invention is further configured as follows: a limit groove for limiting the rotation angle of the pressing arm is provided in the casing; when the pressing arm rotates and approaches one end of the limit groove, the pressing arm presses the switch key of the micro switch; when the pressing arm rotates and abuts against the other end of the limit groove, the wheel axle interferes with the pushing arm during the process of sliding upward along the movable groove to drive the pushing arm to rotate.

[0012] By adopting the above scheme, the rotation angle of the pressing arm is limited by setting a limit groove. When the pressing arm rotates and hits the other end of the limit groove, the wheel axle interferes with the pushing arm during the upward sliding process along the movable groove. At this time, the pushing arm can be prevented from being separated from the wheel axle due to excessive rotation angles of the pushing arm and the pressing arm, thereby ensuring that the pushing arm can be rotated when the wheel axle moves upward.

[0013] The present invention is further configured such that the top of the movable groove extends obliquely upward toward a direction close to the rear end of the housing.

[0014] By adopting the above solution, the top of the movable groove extends upwardly and obliquely toward the rear end of the casing, thereby increasing the friction force when the wheel axle slides along the movable groove, thereby slowing down the movement speed of the wheel axle and reducing the impact force when the wheel axle moves to both ends of the movable groove.

[0015] The present invention is further configured as follows: the dust box is detachably connected to the casing, and a bracket plate is provided at the front end of the casing for supporting the bottom of the dust box after the dust box is installed; the bracket plate is rotatably connected to the front end of the casing, and when the rotating end of the bracket plate abuts against the casing during downward rotation, the dust box is supported on the upper surface of the bracket plate after installation; when the movable end of the bracket plate abuts against the casing during upward rotation, the movable end of the bracket plate extends upwardly and obliquely toward the rear end of the casing.

[0016] By adopting the above scheme, since the weight of the garbage in the dust box increases after accumulation, by setting a bracket plate to support the bottom of the dust box, the force on the installation point of the dust box and the casing can be reduced, thereby improving the structural stability; at the same time, when the rotating end of the bracket plate abuts against the casing during the downward rotation of the bracket plate, the dust box is supported on the upper surface of the bracket plate after installation; when the movable end of the bracket plate abuts against the casing during the upward rotation of the bracket plate, the movable end of the bracket plate extends upwardly toward the rear end of the casing to achieve storage.

[0017] The present invention is further configured as follows: the blades of the fan are arranged at an angle and the upper end is close to the dust box, the lower end of the air inlet channel is close to the dust box and the upper end is extended at an angle to be connected to the blades of the fan, and the lower end of the air outlet channel is connected to the blades of the fan and the upper end is extended at an angle to be connected to the dust box.

[0018] By adopting the above scheme, the blades of the fan are arranged at an angle and the upper end is close to the dust box, the lower end of the air inlet channel is close to the dust box and the upper end is extended at an angle to be connected to the blades of the fan, and the lower end of the air outlet channel is connected to the blades of the fan and the upper end is extended at an angle to be connected to the dust box; at this time, the bending of the air inlet channel and the air outlet channel during the extension process can be reduced, thereby improving the smoothness of the air flowing in the air inlet channel and the air outlet channel.

[0019] The present invention is further configured as follows: an adjustment component for adjusting the height of the auxiliary wheel is arranged between the auxiliary wheel and the air inlet channel, the adjustment component includes an adjustment seat arranged on the side of the air inlet channel and having a plurality of adjustment holes arranged in a vertical direction, and a connecting cover having a plug-in shaft that passes through the middle of the auxiliary wheel and is plugged and fixed in any one of the adjustment holes; the auxiliary wheel is located between the adjustment seat and the connecting cover and is rotatably connected to the plug-in shaft.

[0020] By adopting the above solution, the use environment of ordinary ground and grass is different. When used on ordinary ground, the air inlet of the air inlet channel needs to be close to the ground to improve the suction; when used on grass, the height of the air inlet of the air inlet channel needs to be increased to prevent the air inlet channel from interfering with the lawn and causing inconvenience in movement; at this time, the height of the auxiliary wheel can be adjusted by adjusting the height of the auxiliary wheel to adjust the height of the air inlet of the air inlet channel to adapt to different use environments

[0021] The present invention is further configured as follows: the motor of the fan is powered by a battery pack for direct current or is powered by an alternating current connected to a national power grid through a power plug.

[0022] By adopting the above solution, the leaf vacuum machine can be powered by DC using a battery pack or by AC power connected to the national power grid using a power plug to meet a variety of usage scenarios.

[0023] The present invention is further configured as follows: the push handle is rotatably connected to the rear end of the casing, a rotating shaft rotatably connected to the casing is provided on one side of the rotating end of the push handle, and a fixing component rotatably connected to the casing and used to fix the rotating angle of the push handle is provided on the other side of the rotating end of the push handle.

[0024] The present invention is further configured as follows: the fixing assembly comprises a button which is axially telescopically arranged on the pushing handle along the rotation axis of the pushing handle, a spring which is arranged between the button and the pushing handle and is used to drive the button to move in a direction away from the pushing handle; the button is provided with a rotating part which is rotatably connected to the casing; the button is provided with two locking parts which are symmetrically arranged along the rotation axis of the pushing handle; the casing is provided with two locking grooves for the locking parts to be embedded in positions corresponding to the locking parts; when the button is pressed to compress the spring, the locking part disengages from the locking groove to realize the rotation of the pushing handle; when the two locking parts are respectively embedded in the two locking grooves at two angles, the pushing handle is in an unfolded use state or a folded and retracted state.

[0025] By adopting the above scheme, the spring is compressed by pressing the button, and the locking portion on the button can be disengaged from the locking slot, thereby realizing the rotation of the push handle; and because the two locking portions are symmetrically arranged along the rotation axis of the push handle, the two locking portions can be embedded in the two locking slots of the casing at two different angles to achieve a fixed angle of the push handle, and the push handle is convenient for storage when it is in a folded and retracted state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of Example 1;

[0027] Figure 2 is a front view of Example 1;

[0028] Figure 3 is a partial cross-sectional view of Example 1;

[0029] Figure 4 is a partial exploded view of Example 1;

[0030] Figure 5 yes Figure 4 A local enlarged view at A in the figure;

[0031] Figure 6 yes Figure 3 A partial enlarged view at B in the figure;

[0032] Figure 7 The local structure explosion at the connection between the push handle and the casing in Example 1 Figure 1 ;

[0033] Figure 8 The local structure explosion at the connection between the push handle and the casing in Example 1 Figure 2 ;

[0034] Fig. 9 It is a structural schematic diagram of Example 2.

[0035] 1. Casing; 11. Air duct; 111. Air inlet channel; 112. Air outlet channel; 12. Movable slot; 13. Axle; 14. Limiting slot; 15. Support leg; 16. Bracket plate; 17. Slot; 2. Fan; 31. Battery pack; 32. Power plug; 4. Dust box; 5. Traveling wheel; 6. Auxiliary wheel; 7. Push handle; 71. Rotating shaft; 72. Fixing assembly; 721. Button; 7211. Rotating part; 7212. Positioning part; 722. Spring; 8. Micro switch; 9. Linkage mechanism; 91. Rotating sleeve; 92. Push arm; 93. Pressing arm; 10. Adjusting assembly; 101. Adjusting seat; 1011. Adjusting hole; 102. Connecting cover; 1021. Connecting shaft. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Embodiment 1: A hand-push leaf vacuum with automatic power-off function, such as Figures 1 to 3 As shown, it includes a casing 1 provided with an air duct 11, a fan 2 fixedly arranged in the casing 1, a dust box 4 arranged at the front end of the casing 1, walking wheels 5 arranged at both sides of the casing 1 and supported on the ground, auxiliary wheels 6 arranged at both sides of the casing 1 and supported on the ground, and a push handle 7 arranged at the rear end of the casing 1.

[0038] like Figure 1 and Figure 2 As shown, the dust box 4 is detachable at the front end of the housing 1 and the lower surface is close to the ground. The plane where the lowest points of the running wheels 5 and the auxiliary wheels 6 are located can be equivalent to the ground. The detachable connection and detachable method of the dust box 4 is conventional technology. For example, the mounting frame on the dust box 4 can be buckled on the housing 1 by snapping. At the same time, a bracket plate 16 is provided at the front end of the housing 1 for supporting the bottom of the dust box 4 after the dust box 4 is installed. The bracket plate 16 is rotatably connected to the front end of the housing 1. When the rotating end of the bracket plate 16 contacts the housing 1 during the downward rotation process, the dust box 4 is supported on the upper surface of the bracket plate 16 after installation; when the movable end of the bracket plate 16 contacts the housing 1 during the upward rotation process, the movable end of the bracket plate 16 extends upwardly and tilted toward the rear end of the housing 1 to achieve storage.

[0039] like Figure 2 and Figure 3As shown, the height of the fan blades of the fan 2 is in the middle of the height direction of the dust box 4, and the air duct 11 includes an air inlet channel 111 at one end close to the ground and connected to the fan blades of the fan 2 at the other end, and an air outlet channel 112 at one end connected to the fan blades of the fan 2 and connected to the dust box 4 at the other end, and the air outlet channel 112 is connected to the top of the side of the dust box 4 close to the fan 2. The fan blades of the fan 2 are arranged obliquely and the upper end is close to the dust box 4, the lower end of the air inlet channel 111 is close to the dust box 4 and the upper end is extended obliquely to connect to the fan blades of the fan 2, and the lower end of the air outlet channel 112 is connected to the fan blades of the fan 2 and the upper end is extended obliquely to connect to the dust box 4.

[0040] like Figure 4 and Figure 5 As shown, two auxiliary wheels 6 are arranged on both sides of the lower end of the air inlet channel 111. At the same time, an adjustment assembly 10 for adjusting the height of the auxiliary wheel 6 is arranged between the auxiliary wheel 6 and both sides of the air inlet channel 111. The adjustment assembly 10 includes an adjustment seat 101 which is integrally arranged on the side of the air inlet channel 111 and has a plurality of adjustment holes 1011 arranged along the vertical direction, and a connection cover 102 which has a plug-in shaft 1021 which passes through the middle of the auxiliary wheel 6 and is plugged and fixed in any one of the adjustment holes 1011. The auxiliary wheel 6 is located between the adjustment seat 101 and the connection cover 102 and is rotatably connected to the plug-in shaft 1021.

[0041] like Figures 3 to 6As shown, a micro switch 8 connected in series with the motor of the fan 2 is arranged in the housing 1, and a battery pack 31 is arranged in the housing 1 for DC power supply. Movable slots 12 are provided on both sides of the housing 1, and the top of the movable slot 12 extends upwardly and obliquely toward the direction close to the rear end of the housing 1. A wheel axle 13 with two ends passing through the movable slot 12 is movably arranged in the movable slot 12, and the outer diameter of the wheel axle 13 matches the width of the movable slot 12, and two running wheels 5 are arranged at both ends of the wheel axle 13. A linkage mechanism 9 is arranged in the housing 1 between the wheel axle 13 and the micro switch 8. When the running wheel 5 and the auxiliary wheel 6 are supported on the ground, the wheel axle 13 slides to the top of the movable slot 12 and drives the linkage mechanism 9 to press the switch key of the micro switch 8 so that the micro switch 8 is turned on. The linkage mechanism 9 includes a rotating sleeve 91 rotatably connected to the frame, a push arm 92 integrally arranged on the rotating sleeve 91 and abutting against the top of the wheel shaft 13, and a pressing arm 93 integrally arranged on the rotating sleeve 91 and used to press the switch of the micro switch 8 after rotation. When the wheel shaft 13 slides to the top of the movable groove 12, the wheel shaft 13 drives the push arm 92 to rotate to drive the pressing arm 93 to press the switch key of the micro switch 8. At the same time, a limiting groove 14 is provided in the housing 1 to limit the rotation angle of the pressing arm 93. When the pressing arm 93 rotates and approaches one end of the limiting groove 14, the pressing arm 93 presses the switch key of the micro switch 8. When the pressing arm 93 rotates and abuts against the other end of the limiting groove 14, the wheel shaft 13 interferes with the push arm 92 during the upward sliding process along the movable groove 12 to drive the push arm 92 to rotate.

[0042] like Figure 2 and Figure 5 As shown, two supporting legs 15 are integrally provided at the rear end of the housing 1. When the housing 1 tilts backward so that the two supporting legs 15 and the push handle 7 are supported on the ground, the wheel axle 13 slides to the bottom of the movable groove 12 under the action of gravity.

[0043] like Figure 1 , Figure 7 and Figure 8As shown, the push handle 7 is rotatably connected to the rear end of the housing 1, and a rotating shaft 71 rotatably connected to the housing 1 is integrally provided on one side of the rotating end of the push handle 7, and a fixing assembly 72 rotatably connected to the housing 1 and used to fix the rotation angle of the push handle 7 is provided on the other side of the rotating end of the push handle 7. The fixing assembly 72 includes a button 721 axially telescopically arranged on the push handle 7 along the rotation axis of the push handle 7, and a spring 722 arranged between the button 721 and the push handle 7 and used to drive the button 721 to move in a direction away from the push handle 7. The button 721 is formed with a rotating portion 7211 rotatably connected to the housing 1, and the button 721 is formed with two clamping portions 7212 symmetrically arranged along the rotation axis of the push handle 7, and the housing 1 is provided with two clamping grooves 17 for the clamping portions 7212 to be respectively embedded. When the button 721 is pressed to compress the spring 722, the locking portion 7212 disengages from the locking slot 17 to rotate the push handle 7; when the two locking portions 7212 are respectively embedded in the two locking slots 17 at two angles, the push handle 7 is in an unfolded use state or a folded and retracted state.

[0044] Implementation effect: The height of the fan blades of the fan 2 is in the middle of the height direction of the dust box 4, and because the lower surface of the dust box 4 is close to the ground, the lower end of the air inlet channel 111 is close to the ground, and the upper end of the air outlet channel 112 is connected to the top of the side of the dust box 4. At this time, the overall length of the air inlet channel 111 and the air outlet channel 112 is relatively short, which is beneficial to increase the wind strength in the air duct 11; at the same time, the shorter length of the air inlet channel 111 can increase the suction force of the fan 2, and the upper end of the air outlet channel 112 is connected to the top of the side of the dust box 4 to increase the storage capacity of the dust box 4, thereby achieving the effect of efficient leaf suction and increasing the amount of leaf collection.

[0045] When the walking wheel 5 and the auxiliary wheel 6 are supported on the ground, the wheel axle 13 is equivalent to being subjected to the force of the entire leaf vacuum machine. At this time, the wheel axle 13 drives the pushing arm 92 to rotate during the process of sliding to the top of the movable groove 12, thereby driving the pressing arm 93 to press the switch of the microswitch 8 through the rotating sleeve 91. When the microswitch 8 is in the power-on state, the fan 2 can be turned on or off by its own switch.

[0046] At the same time, because the lower end of the air inlet channel 111 is close to the ground, if the motor in the air duct 11 is touched, the casing 1 needs to be tilted backward so that the two supporting legs 15 and the push handle 7 are supported on the ground. At this time, the wheel axle 13 slides to the bottom of the movable groove 12 under the action of gravity. At this time, the microswitch 8 is in the power-off state, and the fan 2 connected in series with the microswitch 8 stops working; or the casing 1 needs to be tilted toward both sides. Because the walking wheels 5 and the auxiliary wheels 6 are supported on the ground, the wheel axle 13 is equivalent to being driven by the gravity of the entire leaf vacuum machine to drive the linkage mechanism 9 to press the switch key of the microswitch 8. At this time, the force on the wheel axle 13 disappears after the casing 1 is tilted, and the microswitch 8 is also in the power-off state, thereby finally realizing the automatic power-off function of tilting; at the same time, when the hand-push leaf vacuum machine is lifted up as a whole, the microswitch 8 is also in the power-off state.

[0047] Embodiment 2: A hand-push leaf vacuum with automatic power-off function, such as Fig. 9 As shown, the difference from Example 1 is that a battery pack 31 is not arranged in the casing 1, and a power plug 32 is installed on the casing 1, which is connected to the national power grid to realize AC power supply. How the power plug 32 is connected to other electrical components is conventional technology and will not be explained again.

[0048] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A hand-push leaf vacuum with a function of automatically shutting off when tipping over, comprising a housing (1) provided with an air duct (11), a fan (2) arranged in the housing (1), a dust collection box (4), running wheels (5) arranged on both sides of the housing (1) and supported on the ground, auxiliary wheels (6) arranged on both sides of the housing (1) and supported on the ground, and a push handle (7) arranged on the rear end of the housing (1), characterized in that: The dust box (4) is arranged at the front end of the casing (1) and its lower surface is close to the ground; the height of the fan blades of the fan (2) is in the middle of the height direction of the dust box (4); the air duct (11) comprises an air inlet channel (111) with one end close to the ground and the other end connected to the fan blades of the fan (2); and an air outlet channel (112) with one end connected to the fan blades of the fan (2) and the other end connected to the dust box (4); the air outlet channel (112) is connected to the top of the side of the dust box (4) close to the fan (2); and the two auxiliary wheels (6) are arranged on both sides of the lower end of the air inlet channel (111); A micro switch (8) connected in series with the motor of the fan (2) is arranged in the casing (1), movable grooves (12) are provided on both sides of the casing (1), a wheel axle (13) is movably arranged in the movable groove (12) with two ends passing through the movable groove (12), and the two running wheels (5) are arranged at the two ends of the wheel axle (13); a linkage mechanism (9) is arranged in the casing (1) and is located between the wheel axle (13) and the micro switch (8) and is used to open or close the micro switch (8); when the running wheel (5) and the auxiliary wheel (6) are supported on the ground, the wheel axle (13) slides to the top of the movable groove (12) and drives the linkage mechanism (9) to press the switch key of the micro switch (8) so that the micro switch (8) is turned on; The rear end of the housing (1) is provided with two supporting legs (15), and when the housing (1) is tilted backward so that the two supporting legs (15) and the push handle (7) are supported on the ground, the wheel axle (13) slides down to the bottom of the movable groove (12) under the action of gravity; The linkage mechanism (9) comprises a rotating sleeve (91) rotatably connected to the housing (1), a pushing arm (92) integrally arranged on the rotating sleeve (91) and abutting against the top of the wheel shaft (13), and a pressing arm (93) integrally arranged on the rotating sleeve (91) and used to press the switch key of the micro switch (8) after rotation; when the wheel shaft (13) slides to the top of the movable groove (12), the wheel shaft (13) drives the pushing arm (92) to rotate and drives the pressing arm (93) to press the switch key of the micro switch (8); A limiting groove (14) for limiting the rotation angle of the pressing arm (93) is arranged in the housing (1); when the pressing arm (93) rotates and approaches one end of the limiting groove (14), the pressing arm (93) presses the switch key of the micro switch (8); when the pressing arm (93) rotates and contacts the other end of the limiting groove (14), the wheel shaft (13) interferes with the pushing arm (92) during the process of sliding upward along the movable groove (12) to drive the pushing arm (92) to rotate.

2. A hand-push leaf vacuum with automatic power-off function when tipping over according to claim 1, characterized in that: The top of the movable groove (12) extends obliquely upward in a direction close to the rear end of the housing (1).

3. A hand-push leaf vacuum with automatic power-off function when dumping according to claim 1, characterized in that: The dust box (4) is detachably connected to the casing (1); a support plate (16) is provided at the front end of the casing (1) for supporting the bottom of the dust box (4) when the dust box (4) is installed; the support plate (16) is rotatably connected to the front end of the casing (1); when the support plate (16) rotates downward and the rotating end abuts against the casing (1), the dust box (4) is supported on the upper surface of the support plate (16) after installation; when the support plate (16) rotates upward and the movable end abuts against the casing (1), the movable end of the support plate (16) extends upwardly and obliquely toward the rear end of the casing (1).

4. A hand-push leaf vacuum with automatic power-off function when dumping according to claim 1, characterized in that: The fan blades of the fan (2) are arranged at an angle and the upper ends are close to the dust box (4); the lower end of the air inlet channel (111) is close to the dust box (4) and the upper end is extended at an angle to connect to the fan blades of the fan (2); the lower end of the air outlet channel (112) is connected to the fan blades of the fan (2) and the upper end is extended at an angle to connect to the dust box (4).

5. A hand-push leaf vacuum machine with automatic power-off function when dumping according to claim 1, characterized in that: An adjustment component (10) for adjusting the height of the auxiliary wheel (6) is arranged between the auxiliary wheel (6) and the air inlet channel (111), the adjustment component (10) comprising an adjustment seat (101) arranged on the side of the air inlet channel (111) and having a plurality of adjustment holes (1011) arranged in a vertical direction, and a connection cover (102) having a plug-in shaft (1021) that passes through the middle of the auxiliary wheel (6) and is plugged and fixed in any one of the adjustment holes (1011); the auxiliary wheel (6) is located between the adjustment seat (101) and the connection cover (102) and is rotatably connected to the plug-in shaft (1021).

6. A hand-push leaf vacuum with automatic power-off function when dumping according to claim 1, characterized in that: The motor of the fan (2) is powered by a battery pack (31) for direct current or by a power plug (32) connected to the national power grid for alternating current.

7. A hand-push leaf vacuum with automatic power-off function when tipping over according to claim 1, characterized in that: The push handle (7) is rotatably connected to the rear end of the housing (1); one side of the rotating end of the push handle (7) is provided with a rotating shaft (71) rotatably connected to the housing (1); the other side of the rotating end of the push handle (7) is provided with a fixing component (72) rotatably connected to the housing (1) and used to fix the rotating angle of the push handle (7).

8. A hand-push leaf vacuum with automatic power-off function when tipping over according to claim 7, characterized in that: The fixing assembly (72) comprises a button (721) which is axially telescopically arranged on the push handle (7) along the rotation axis (71) of the push handle (7), a spring (722) which is arranged between the button (721) and the push handle (7) and is used to drive the button (721) to move in a direction away from the push handle (7), the button (721) is provided with a rotating portion (7211) which is rotationally connected to the housing (1), and the button (721) is provided with two locking portions which are symmetrically arranged along the rotation axis of the push handle (7). (7212), the housing (1) is provided with two slots (17) at positions corresponding to the locking portions (7212) for the locking portions (7212) to be respectively inserted into; when the button (721) is pressed to compress the spring (722), the locking portions (7212) are separated from the slots (17) to realize the rotation of the push handle (7); when the two locking portions (7212) are respectively inserted into the two slots (17) at two angles, the push handle (7) is in an unfolded use state or a folded and retracted state.

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