CN111973064A

CN111973064A - Floor sweeping head and hand-held floor sweeper adopting same

Info

Publication number: CN111973064A
Application number: CN201910428584.5A
Authority: CN
Inventors: 山冈敏成; 潘成信
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2020-11-24
Anticipated expiration: 2039-05-22
Also published as: CN111973064B

Abstract

The invention discloses a sweeping head and a hand-held sweeping machine adopting the same, comprising: a sweeping device comprising a sweeping element; the transmission shaft is used for introducing power to the sweeping head; a speed reduction mechanism for transmitting power and including a drive shaft for driving the cleaning element; a housing accommodating at least part of the speed reducing mechanism; the first connecting rod is connected with the shell; a shield including a surrounding portion; the broom head still includes: a mounting assembly for mounting the shield to the housing or the first connecting rod and enabling the reduction mechanism to have a first mounting state and a second mounting state; when the speed reducing mechanism is in the first installation state, a preset gap is formed between the inner side of the surrounding part and the cleaning element; when the speed reducing mechanism is in the second mounting state, a preset gap is formed between the inner side of the surrounding part and the tail end of the cleaning element. The sweeping head and the shield of the handheld sweeping machine adopting the sweeping head have good protection effect and do not interfere with sweeping elements.

Description

Floor sweeping head and hand-held floor sweeper adopting same

Technical Field

The invention relates to a garden tool, in particular to a sweeping head and a handheld sweeper adopting the sweeping head.

Background

The hand-held sweeper is a garden-type tool that can be operated by a user to sweep grass clippings, leaves, etc. and thus a garden or garden. In some existing handheld floor sweepers, the operating mode is single, the structure is complex, the working condition suitable for the handheld floor sweepers is single, and meanwhile, the defect that the operation of a user is inconvenient is also brought. In fact, in some other types of handheld floor sweeping machines, the protection of the shield of the floor sweeping head cannot be adaptively installed according to different operation modes of a user, i.e., the protection mode of the shield of the floor sweeping head is single and cannot adapt to different working conditions. How to provide a guard shield can be suitable for different operating modes and operation mode, and can effectually play the first and adopt this handheld sweeper of sweeping the floor head of guard action is the technical problem that awaits the solution at present.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a sweeping head with a protective cover capable of being suitable for different working conditions and effectively protecting and a handheld sweeping machine with the sweeping head.

In order to achieve the above object, the present invention adopts the following technical solutions:

a sweeping head suitable for use with a hand-held sweeper, comprising: a cleaning device comprising a cleaning element rotatable about a first axis; the transmission shaft is used for introducing power to the sweeping head and can rotate around a second axis; the speed reducing mechanism is used for realizing power transmission between the transmission shaft and the cleaning device and comprises a driving shaft for driving the cleaning element to rotate; a housing accommodating at least part of the speed reducing mechanism; the first connecting rod is connected with the shell; a shroud comprising a surrounding portion surrounding at least a portion of the sweeping element; the broom head still includes: a mounting assembly for mounting the shield to the housing or the first connecting rod and enabling the reduction mechanism to have a first mounting state and a second mounting state; when the speed reducing mechanism is in the first installation state, a preset gap is formed between the inner side of the surrounding part and the cleaning element; when the speed reducing mechanism is in the second mounting state, a preset gap is formed between the inner side of the surrounding part and the cleaning element.

Further, the surrounding portion includes a front surrounding portion and a rear surrounding portion respectively located on both sides of a first plane, the first plane passing through the second axis and being parallel to the first axis; when the speed reducing mechanism is in the first installation state, the front surrounding part is positioned on the front side of the first plane, and the rear surrounding part is positioned on the rear side of the first plane; when the speed reducing mechanism is in the second mounting state, the front surrounding portion is located on the front side of the first plane, and the rear surrounding portion is located on the rear side of the first plane.

Further, the position of the speed reducing mechanism relative to the shield in the second mounting state is rotated by 180 degrees relative to the position of the speed reducing mechanism relative to the shield in the first mounting state; the surface area of the front surrounding part is larger than that of the rear surrounding part; when the speed reducing mechanism is in the first installation state, the minimum distance between the front surrounding part and the cleaning element is more than or equal to 10 mm; when the speed reducing mechanism is in the second mounting state, the minimum distance between the cowl portion and the cleaning element is 10 mm or more.

Further, the rear surrounding portion extends substantially in a plane perpendicular to the second axis.

Further, the mounting assembly further comprises: the limiting piece is used for limiting the rotation of the protective cover relative to the first connecting rod.

Furthermore, a positioning hole for inserting the limiting member is formed in the first connecting rod, and the positioning hole extends in a direction parallel to the second axis.

Further, the limiting piece is connected with the shell through a fastener.

Further, a projection of the surrounding portion in a second plane perpendicular to the first axis extends substantially along an arc line, and an angle formed by an intersection of a line connecting one end of the arc line and the first axis and a line connecting the other end of the arc line and the first axis is 120 ° or more and 150 ° or less.

Further, the projection of the surrounding part in a second plane perpendicular to the first axis extends along a substantially arc line, the edge of the projection of the cleaning device in a second plane perpendicular to the first axis is substantially a circle, and the distance between the arc line and the circle is increased and then decreased.

Further, the projection of the surrounding part in a second plane perpendicular to the first axis extends along an arc line basically, the edge of the projection of the sweeping device in the second plane perpendicular to the first axis is a circle basically, a mounting hole for the connecting rod to pass through is formed in the surrounding part, and the projection point of the center of the mounting hole in the second plane is defined as a mounting point; the arc line is provided with a first end and a second end, and the distance between the first end and the mounting point is larger than the distance between the second end and the mounting point; wherein, the distance D obtained by subtracting the radius R of the circle from the distance L between the first end and the center of the circle is more than or equal to 35mm and less than or equal to 70 mm.

Further, the distance D obtained by subtracting the radius R of the circle from the distance L between the first end and the center of the circle is more than or equal to 35mm and less than or equal to 50 mm.

Further, when the speed reducing mechanism is in the first mounting state, the shield surrounding portion does not contact the tip of the cleaning element; when the speed reducing mechanism is in the second mounting state, the shield surrounding portion does not contact the distal end of the cleaning element.

A hand-held sweeper, comprising: a power head and a sweeping head as described above, the power head including an output shaft for outputting power.

Further, the power head includes: the output power of the engine is larger than 1000W.

Further, the power head includes: a motor; a main body case including a coupling part for coupling a battery pack supplying power to the motor; one end of the second connecting rod is connected with the host shell, and the other end of the second connecting rod is connected with the first connecting rod; the host shell and the shell are respectively positioned at two ends of the whole body formed by the first connecting rod and the second connecting rod.

The invention has the advantages that: by arranging different installation positions of the shield and installing the shield on the sweeping head at different installation positions, the sweeping head and the handheld sweeping machine shield adopting the sweeping head have good protection effect and do not interfere with the sweeping element.

Drawings

Figure 1 is a perspective view of a hand-held sweeper;

figure 2 is a perspective view of the sweeping head of figure 1 adapted for use with a hand-held sweeper;

figure 3 is a perspective view from another perspective of the cleaning head of figure 2;

FIG. 4 is an exploded view of the broom of FIG. 3;

figure 5 is a perspective view of the cleaning head of figure 4 with the cleaning device removed;

figure 6 is an exploded view of the cleaning head of figure 5 with the cleaning device removed;

figure 7 is an exploded view of the cleaning head of figure 6 from another perspective with the cleaning device removed;

fig. 8 is an enlarged view of a portion a of the structure in fig. 5;

fig. 9 is an enlarged view of a portion B of the structure of fig. 6;

FIG. 10 is an enlarged view of the structure of section C in FIG. 7;

figure 11 is a plan view of the cleaning head of figure 2 in a first, installed condition;

figure 12 is a plan view of the removal cleaning device of figure 11 with the cleaning head in a second, installed condition;

figure 13 is a plan view of the cleaning head of figure 2 in a second, installed condition;

figure 14 is a plan view of the removal cleaning device of figure 13 with the cleaning head in a second, installed condition.

Detailed Description

The hand-held sweeper 100 shown in fig. 1-3 includes: the device comprises a connecting rod 11, a power head 12 and a sweeping head 13, wherein the connecting rod 11 is used for connecting the power head 12 and the sweeping head 13. The power head 12 and the sweeping head 13 may be respectively disposed at both ends of the connecting rod 11, and transmit power through a transmission shaft 14 disposed inside the connecting rod 11, thereby driving the sweeping head 13. In fact, the power head 12 and the sweeping head 13 may be provided on the same end of the linkage 11 so that the power head 12 can directly drive the sweeping head 13. The powerhead 12 may include an engine, a battery-powered motor, or a direct current motor. To meet the power output requirement of the floor sweeping head 13, the output power of the engine is greater than 1000W. In the present embodiment, the link 11 includes a first connecting rod 111 connected to the floor sweeping head 13 and a second connecting rod 112 connected to the power head 12. The transmission shafts 14 are arranged inside the first connecting rod 111 and the second connecting rod 112, and the transmission shafts 14 are connected through a coupler and can transmit power through the coupler. The connecting rod 11 is further provided with a handle assembly 113 for holding and a control assembly 114 for controlling the hand-held sweeper 100. In the present embodiment, the handle assembly 113 includes a first handle portion 113a and a second handle portion 113 b. Wherein, the first handle portion 113a at least partially surrounds the connecting rod 11 to form a ring portion for carrying. The second handle portion 113b extends away from the first handle portion and in a direction substantially perpendicular to the extension of the connecting rod 11, and is provided for being held by a user. The first handle portion 113a and the second handle portion 113b are held in different manners so that the hand-held sweeper 100 has at least two operating manners.

The powerhead 12 includes a main housing 121 and a motor. The main body case 121 is formed with an accommodating space for accommodating the motor, and is also formed with a coupling portion 122 for mounting the battery pack. The second connecting rod 112 is connected to the main machine housing 121, and the motor outputs power through an output shaft connected to the transmission shaft 14 and transmitting power through the transmission shaft 14.

As shown in fig. 4 to 7, the cleaning head 13 includes: cleaning device 131, speed reduction mechanism 132, case 133, and shroud 134. The first connecting rod 111 is fixedly connected to or integrally formed with the sweeping head 13, and in fact, the first connecting rod 111 can be a part of the sweeping head 13. The cleaning device 131 includes a roller 131a rotatable about the first axis 101 and a cleaning element 131b mounted to the roller 131 a. The first connecting rod 111 is connected with the housing 133. The transmission shaft 14 inside the first connecting rod 111 introduces the power of the transmission shaft 14 inside the second connecting rod 112 into the sweeping head 13 through the coupling, and the transmission shaft 14 rotates around the second axis 102 and can drive the cleaning device 131 to rotate around the first axis 101. In fact, the transmission shaft 14 is connected to the speed reducing mechanism 132, and the speed reducing mechanism 132 further includes a driving shaft 132a, and the driving shaft 132a is used for installing the rolling member 131a and can drive the rolling member 131a to rotate around the first axis 101. The housing 133 is formed with a first accommodating space for accommodating at least part of the reduction mechanism 132. The shield 134 is formed with a surrounding portion 134a for surrounding at least a portion of the cleaning element 131b to prevent the cleaning element 131b from rotating to fly debris and thereby injure a user during operation of the sweeper.

As shown in fig. 5-10, the cleaning head 13 further includes a mounting assembly 135 for mounting the shield 134 to the housing 133 or the first connecting link 111. The mounting assembly 135 further includes a limiting member 135a for limiting the rotation of the shield 134 with respect to the first connecting rod 111. Specifically, the shroud 134 includes a first connection portion that can cooperate with the mounting assembly 135 to mount the shroud 134 to the housing 133 or the first connecting rod 111. In this embodiment, the first connection portion includes an installation hole 134d penetrating through itself along the second axis 102 direction, a first connection hole 134e is further formed in the circumferential direction of the installation hole 134d, the first connection hole 134e and the installation hole 134d are perpendicular to each other, a first receiving groove 134f into which the limiting member 135a is inserted is further formed along the extending direction of the installation hole 134d, and the first connection hole 134e penetrates through the first receiving groove 134 f. The first connection portion itself has an elastic force, and when the fastener 135e is connected to the first connection hole 134e, it can tighten the first receiving groove 134f and fix the shield 134 to the housing 133 or the first connection rod 111. The limiting member 135a extends substantially along the second axis 102 and has a first fixing hole 135b and a second fixing hole 135 c. The first fixing hole 135b is used to match the first connecting hole 134e to connect with the shield 134, and the second fixing hole 135c is used to fix the limiting member 135a itself. The position limiter 135a further forms a position limiter 135d in a linear direction perpendicular to both the first axis 101 and the second axis 102. The limiting portion 135d is a protrusion protruding from the limiting member 135a in the extending direction thereof. The first connecting rod 111 is formed with a positioning hole 111a for inserting the position-limiting portion 135d, and the positioning hole 111a extends along a direction parallel to the second axis 102. In the present embodiment, the housing 133 is further formed with a second connection hole 133a for connecting the stopper 135 a. In a first plane 103 passing through the second axis 102 and parallel to the first axis 101, the housing 133 is further formed with third connection holes 133b symmetrical with respect to the first plane 103. The third connection hole 133b is the same size and functions as the second connection hole 133 a. In fact, in the direction of the second axis 102, the housing where the second connecting hole 133a is located is formed with a second receiving groove 133c into which the limiting member 135a can be inserted, and the second connecting hole 133a is perpendicular to or intersects with the second receiving groove 133 c. The housing where the third connecting hole 133b is located has a third receiving groove 133d into which the limiting member 135a can be inserted, and the third connecting hole 133b and the third receiving groove 133d are perpendicular or intersecting. After the limiting member 135a is inserted into the second receiving groove 133c, the limiting member is engaged with the second connecting hole 133a through the second fixing hole 135c, so as to be connected with the housing 133 to form a whole. Alternatively, after the limiting member 135a is inserted into the third receiving groove 133d, the limiting member is engaged with the third connecting hole 133b through the second fixing hole 135c, so as to be connected with the housing 133 as a whole. The housing 133 further forms a second accommodating space 133e in which the first connecting rod 111 is inserted and connected along the extending direction of the second axis 102, and the first accommodating space is at least partially communicated with the second accommodating space 133 e.

Specifically, when the limiting portion 135d of the limiting member 135a is inserted into the positioning hole 111a, the limiting member 135a and the first connecting rod 111 are inserted into the second accommodating space 133e of the housing 133 together. During the process of inserting the first connecting rod 111 into the second receiving space 133e, the limiting member 135a is simultaneously inserted into the second receiving groove 133 c. It can be understood that the first connecting rod 111 and the second receiving space 133e have a relatively fixed connection therebetween. After the limiting member 135a is inserted into the second receiving groove 133c, the limiting member 135a is fixed into the second connecting hole 133a by a fastener; alternatively, during the process of inserting the first connecting rod 111 into the second receiving space 133e, the limiting member 135a is simultaneously inserted into the third receiving groove 133d, and the limiting member 135a is fixed to the third connecting hole 133b by a fastener. At this time, the displacement of the first connecting rod 111 along the second axis 102 is limited; meanwhile, the first connecting rod 111 cannot rotate around the second axis 102 in the circumferential direction. That is, the first connecting rod 111 and the limiting member 135a are fixed to the housing 133 at the same time. At this time, the mounting hole 134d of the first connecting portion of the protective cover 134 is further sleeved into the first connecting rod 111, the position of the first receiving groove 134f is aligned with the position-limiting member 135a, and after the position-limiting member 135a is inserted into the first receiving groove 134f, the protective cover 134 is fixed to the first connecting rod 111 by the fastening member 135e passing through the first fixing hole 135b and the first connecting hole 134 e. It is understood that the shield 134 may also be directly disposed on the outer wall of the housing 133 and detachably connected to the housing 133.

For clearly explaining the technical scheme of the invention, the following is also defined as shown in fig. 2: front side, back side. As shown in fig. 2, in the first plane 103, the surrounding portion 134a of the shroud 134 includes a front surrounding portion 134b and a rear surrounding portion 134c on both sides of the first plane 103 in the front-rear direction. Wherein the surface area of the front surrounding portion 134b is larger than the surface area of the rear surrounding portion 134 c. The rear surround portion 134c extends substantially in a plane perpendicular to the second axis 102. Here, it is defined that the maximum dimension of the front surrounding portion 134b in the direction parallel to the first axis 101 is L1, the maximum dimension of the rear surrounding portion 134c in the direction parallel to the first axis 101 is L2, and the ratio of L1 to L2 is 2 or more and 3 or less. That is, in the first axis 101 direction, the front surrounding portion 134b is wide, and the rear surrounding portion 134c is narrow. In some preferred embodiments, the ratio of the maximum dimension L1 of the front surrounding portion 134b in the direction parallel to the first axis 101 to the maximum dimension L2 of the rear surrounding portion 134c in the direction parallel to the first axis 101 is 2.2 or more and 2.6 or less. By setting the above ratio, a more secure connection relationship of the front surrounding portion 134b and the rear surrounding portion 134c can be achieved, and at the same time, the volume and mass of the entire shroud 134 can be reduced while the surface area of the rear surrounding portion 134c is reduced. The hood 134 has an inner surface 134h adjacent to the cleaning element 131b and an outer surface 134i opposite to the inner surface 134h, and ribs 134j are integrally formed on the inner surface 134h or the outer surface 134i, the ribs 134j extending from the rear surrounding portion 134c to both sides of the front surrounding portion 134b in a direction parallel to the first axis 101. The stiffener 134j, on the one hand, can increase the structural strength of the shroud 134 itself; on the other hand, the strength of the joint between the front surrounding portion 134b and the rear surrounding portion 134c can be further increased, and the joint between the rear surrounding portion 134c and the front surrounding portion 134b is prevented from being broken due to the narrow width of the rear surrounding portion 134 c.

When the reduction mechanism 132 is coupled to the first connecting rod 111 by the mounting assembly 135, the reduction mechanism 132 has a first mounting state and a second mounting state with respect to the first connecting rod 111. As shown in fig. 11 to 12, when the speed reducing mechanism 132 is in the first mounted state, the front surrounding portion 134b is located on the front side of the first plane 103, and the rear surrounding portion 134c is located on the rear side of the first plane 103. At this time, the speed reduction mechanism 132 drives the cleaning device 131 to rotate in the first direction 105. As shown in fig. 13 to 14, when the speed reducing mechanism 132 is in the second mounted state, the front surrounding portion 134b is located on the front side of the first plane 103, and the rear surrounding portion 134c is located on the rear side of the first plane 103. At this time, the speed reduction mechanism 132 drives the cleaning device 131 to rotate in the second direction 106. The speed reduction mechanism 132 is rotated 180 degrees with respect to the position of the case 133 in the first attachment state with respect to the speed reduction mechanism 132 when in the position of the second attachment state with respect to the case 133. It should be emphasized that, when the speed reducing mechanism 132 is in the first installation state, the limiting member 135a is inserted into the second receiving groove 133c, and is engaged with the second connecting hole 133a through the second fixing hole 135c, so as to be connected with the housing 133 as a whole. When the speed reducing mechanism 132 is in the second installation state, the limiting member 135a is inserted into the third receiving groove 133d, and is engaged with the third connecting hole 133b through the second fixing hole 135c, so as to be connected with the housing 133 as a whole.

The projection of the surrounding portion 134a in a second plane 104 perpendicular to the first axis 101 extends substantially along an arc. The arc line has a first end 134k and a second end 134m, and an angle γ formed by intersecting a line connecting the first end 134k and the first axis 101 and a line connecting the second end 134m and the first axis 101 is 120 ° or more and 150 ° or less. The projected edge of the cleaning device 131 on a second plane 104 perpendicular to the first axis 101 is substantially a circle, and the distance between the arc line and the circle is increased and then decreased. The minimum distance between the surrounding portion 134a and the cleaning element 131b is 10mm or more and 30mm or less. In some preferred embodiments, the minimum distance between the surrounding portion 134a and the sweeping element 131b is 15mm or more and 30mm or less. Due to the distance between the cleaning element 131b and the shield 134, on one hand, the cleaning element 131b is prevented from contacting the shield 134 during rotation, and on the other hand, objects such as fallen leaves can be prevented from passing through the gap between the shield 134 and the cleaning element 131b, which affects the cleaning effect, and meanwhile, the user can be prevented from being injured by debris. It is also defined herein that a projected point of the center of the mounting hole 134d in a direction perpendicular to the first axis 101 is a mounting point 134n, and the distance between the first end 134k and the mounting point 134n is larger than the distance between the second end 134m and the mounting point 134 n. A line connecting first end 134k and first axis 101 and a line connecting mounting point 134n and first axis 101 intersect to form a first included angle α, a line connecting second end 134m and first axis 101 and a line connecting mounting point 134n and first axis 101 intersect to form a second included angle β, and a ratio between the first included angle and the second included angle is equal to or greater than 5 and equal to or less than 7.

The distance D obtained by subtracting the radius R of the circle from the distance L between the first end 134k and the center of the circle formed by the projection of the cleaning device 131 is not less than 35mm and not more than 70 mm. In some embodiments, the distance D between the first end 134k and the center of the circle, L minus the radius R of the circle, is greater than or equal to 35mm and less than or equal to 50 mm. Through the design, objects with small mass such as fallen leaves are not easy to pass through the gap between the shield 134 and the cleaning device 131, and the cleaning effect is good.

More specifically, the front surrounding portion 134b is a continuous arc, but the curvatures of the front surrounding portion 134b at different arc positions are different in order to meet the stopping requirements of the cleaning element 131b at different positions. Accordingly, the distance between the cowl portion 134b and the cleaning element 131b is also different. In the present embodiment, the hood 134 is in the first attached state, and the minimum distance between the cowl portion 134b and the cleaning element 131b is 10mm or more. The hood 134 is in the second attached state, and the minimum distance between the cowl portion 134b and the cleaning element 131b is also 10mm or more. The rear surrounding portion 134c is a flat section fixedly connected to or integrally formed with the front surrounding portion 134b and extends out from an end of the front surrounding portion 134b near the first plane 103.

When the speed reduction mechanism 132 is in the first attached state, the inside of the surrounding portion 134a of the guard 134 does not contact the cleaning element 131 b; when the reduction mechanism 132 is in the second attached state, the inside of the surrounding portion 134a of the guard 134 does not contact the cleaning element 131 b. In fact, regardless of the installation state of the speed reduction mechanism 132, the guard 134 is not in contact with the cleaning element 131b and does not interfere with the rotation of the cleaning element 131 b. In some preferred embodiments, shroud 134 enclosure 134a is not in contact with sweeping element 131 b; when the reduction mechanism 132 is in the second attachment state, the surrounding portion 134a of the guard 134 does not contact the cleaning element 131 b. As shown in fig. 11-12, the sweeping element 131b rotates in the first direction 105, and the user pushes the hand-held sweeper 100 to move forward. During this time, the user needs to overcome the reaction force generated by the sweeping member 131b toward the user standing direction. When the user encounters a special condition, the interaction force between the cleaning element 131b and the contact surface is large, which results in a large pushing resistance, and the user cannot push or bear a large resistance when continuing to operate the hand-held sweeper 100 in a pushing manner. At this time, the operation mode can be adjusted to operate the hand-held sweeper 100 in a dragging mode. When the user operates the hand-held sweeper 100 in a dragging manner, the speed reducing mechanism 132 is in the second installation state, as shown in fig. 13 to 14, the sweeping element 131b continues to rotate in the second direction 106, and at this time, the user pulls the hand-held sweeper 100 to move backwards. During this period, the user needs to move in the direction of the rotation of the cleaning element 131b, and the cleaning element 131b has a certain driving force, so the operation mode is more convenient for the user to operate the hand-held sweeper 100. In fact, whether the push or pull type operation is adopted, the shield 134 can surround at least part of the cleaning device 131 and keep out of contact with the cleaning element 131b as long as the relative installation manner of the speed reducing mechanism 132 is adjusted according to different operation manners.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A sweeping head comprising:

a cleaning device comprising a cleaning element rotatable about a first axis;

a transmission shaft for introducing power to the sweeping head and rotatable about a second axis;

the speed reducing mechanism is used for realizing power transmission between the transmission shaft and the sweeping device and comprises a driving shaft for driving the sweeping element to rotate;

a housing accommodating at least part of the speed reducing mechanism;

the first connecting rod is connected with the shell;

a shield including a surrounding portion surrounding at least a part of the sweeping element;

it is characterized in that the preparation method is characterized in that,

the floor sweeping head further comprises:

a mounting assembly for mounting the shield to the housing or the first connecting rod and enabling the reduction mechanism to have a first mounting state and a second mounting state;

when the speed reducing mechanism is in the first installation state, a preset gap is formed between the inner side of the surrounding part and the cleaning element; when the speed reducing mechanism is in the second mounting state, a preset gap is formed between the inner side of the surrounding part and the tail end of the cleaning element.

2. The head of claim 1, wherein:

the surrounding part comprises a front surrounding part and a rear surrounding part which are respectively positioned on two sides of a first plane, and the first plane passes through the second axis and is parallel to the first axis; when the speed reducing mechanism is in the first mounting state, the front surrounding portion is located on the front side of the first plane, and the rear surrounding portion is located on the rear side of the first plane; when the reduction mechanism is in the second mounted state, the front surrounding portion is located on a front side of the first plane, and the rear surrounding portion is located on a rear side of the first plane.

3. The head of claim 1, wherein:

the reduction mechanism is rotated 180 degrees relative to the shield in the second mounted state relative to the reduction mechanism in the first mounted state;

the surface area of the front surrounding part is larger than that of the rear surrounding part; when the speed reducing mechanism is in the first mounting state, the minimum distance between the front surrounding part and the cleaning element is more than or equal to 10 mm; when the speed reducing mechanism is in the second mounting state, the minimum distance between the front surrounding portion and the cleaning element is 10 mm or more.

4. A cleaning head according to claim 3, wherein:

the rear surrounding portion extends substantially in a plane perpendicular to the second axis.

5. The head of claim 1, wherein:

the mounting assembly further comprises:

and the limiting piece is used for limiting the rotation of the protective cover relative to the first connecting rod.

6. A cleaning head according to claim 5, wherein:

the first connecting rod is provided with a positioning hole for the insertion of the limiting piece, and the positioning hole extends along a direction parallel to the second axis.

7. The head of claim 6, wherein:

the limiting piece is connected with the shell through a fastening piece.

8. The head of claim 1, wherein:

the projection of the surrounding part in a second plane perpendicular to the first axis extends along an arc line, and the included angle formed by the intersection of a line of one end of the arc line and the first axis and a line of the other end of the arc line and the first axis is greater than or equal to 120 degrees and less than or equal to 150 degrees.

9. The head of claim 1, wherein:

The projection of the surrounding part in a second plane perpendicular to the first axis extends along an arc, the edge of the projection of the sweeping device in the second plane perpendicular to the first axis is a circle, and the distance between the arc and the circle is increased and then decreased.

10. The head of claim 1, wherein:

a projection of the surrounding part in a second plane perpendicular to the first axis extends along an arc line, the edge of the projection of the sweeping device in the second plane perpendicular to the first axis is a circle, the surrounding part is provided with a mounting hole for the connecting rod to pass through, and a projection point of the center of the mounting hole in the second plane defines a mounting point; the arc has a first end and a second end, the first end being spaced further from the mounting point than the second end is spaced from the mounting point;

and the distance D obtained by subtracting the radius R of the circle from the distance L between the first end and the center of the circle is more than or equal to 35mm and less than or equal to 70 mm.

11. The head of claim 10, wherein:

And the distance D obtained by subtracting the radius R of the circle from the distance L between the first end and the center of the circle is more than or equal to 35mm and less than or equal to 50 mm.

12. The head of claim 1, wherein:

the shield surrounding portion does not contact with the tip end of the cleaning element when the speed reducing mechanism is in the first attached state; when the speed reducing mechanism is in the second attachment state, the guard surrounding portion does not contact the tip of the cleaning element.

13. A hand-held sweeper, comprising: a power head and a cleaning head according to any one of claims 1 to 12, the power head including an output shaft for outputting power.

14. The hand-held sweeper of claim 13, wherein:

the power head includes: the output power of the engine is larger than 1000W.

15. The hand-held sweeper of claim 13, wherein:

the power head includes:

a motor;

a main body case including a coupling part for coupling a battery pack supplying power to the motor;

one end of the second connecting rod is connected with the host shell, and the other end of the second connecting rod is connected with the first connecting rod;

The host shell and the shell are respectively positioned at two ends of the whole body formed by the first connecting rod and the second connecting rod.