Hand-push type leaf sweeping machine and height adjusting method thereof

Abstract

The invention provides a hand-push type leaf sweeping machine and a height adjusting method thereof. The hand-push type leaf sweeping machine comprises a vehicle body. A rotating shaft of the main brush is rotationally mounted on the vehicle body; the two wheels are in transmission connection with the two ends of the rotating shaft respectively; the height adjusting mechanism is arranged on the rotating shaft and the wheels at the same time and located between the vehicle body and the wheels; and the universal wheels are arranged behind the wheels. The height adjusting mechanism is arranged on the rotating shaft of the main brush and the wheel shaft of the wheel at the same time, the universal wheel is arranged behind the wheel, the distance between the lowest end of the wheel in the vertical direction and the rotating shaft can be manually adjusted, multi-gear adjustment of the ground clearance of the main brush can be achieved, automatic auxiliary power compensation after height adjustment is conducted, and the working efficiency is improved. Smooth movement of the whole machine after height adjustment is guaranteed, the service life of the main brush can be prolonged, cleaning cleanliness can be improved, and the purposes that movement is smooth and labor is saved after the ground clearance of the main brush is adjusted are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hand-push leaf sweeper, in particular to a hand-push leaf sweeper and a height adjusting method thereof. BACKGROUND

[0002] The hand-push leaf sweeper has become an important tool for cleaning fallen leaves and debris in roads, squares and parks due to its flexible operation and high efficiency. The existing hand-push leaf sweeper is usually equipped with a vehicle body, a push rod, wheels, a main brush (or a sweeping brush or a rolling brush), a dust collecting box, etc. When working, the worker pushes the vehicle body forward through the push rod, and the rolling of the wheels drives the main brush in contact with the ground to gather and sweep the fallen leaves, debris and other garbage on the ground into the dust collecting box. However, if the main brush cannot effectively adhere to the ground, it will seriously affect the cleaning quality.

[0003] However, the existing hand-push leaf sweeper has the following shortcomings:

[0004] 1. The height of the traditional main brush is usually fixed and cannot be adjusted, so the contact between the main brush and the ground not only increases the difficulty of the worker to push the leaf sweeper in the non-working section, but also causes the consumption of the bristles of the main brush in the non-working section, resulting in the shortening of the service life of the main brush.

[0005] 2. Some improved hand-push leaf sweepers can adjust the height, but the adjustable height is limited, and after adjusting the height, the bristles may not adhere to the ground well, resulting in poor cleaning quality, or the bristles may have too much pressure on the ground, making it difficult or laborious to move forward when working.

[0006] In summary, the existing cleaning equipment needs a technical solution that can dynamically adjust the contact state of the main brush with the ground to improve the continuous operation ability, cleaning quality and use convenience of the equipment. SUMMARY

[0007] The present application aims to overcome the defects of the prior art and provides a hand-push leaf sweeper and a height adjusting method thereof, which can avoid the problems of short service life of the main brush, poor cleaning quality, difficulty in moving forward after adjusting the height, and laboriousness, etc. caused by the inability to adjust the height of the main brush or the limited adjustable height in the prior art.

[0008] In order to achieve the above and other purposes, the present application is realized by including the following technical solutions: as a first aspect, the present application proposes a hand-push leaf sweeper, which comprises a vehicle body, a main brush with a rotating shaft installed on the vehicle body, two wheels respectively in transmission connection with both ends of the rotating shaft, a height adjusting mechanism arranged on the rotating shaft and the wheels and located between the vehicle body and the wheels, and a universal wheel arranged behind the wheels.

[0009] In an embodiment, the universal wheel is mounted on the vehicle body or on a mounting portion of a push rod; the push rod is mounted on the vehicle body, and the mounting portion extends below the front portion of the vehicle body.

[0010] In an embodiment, the height adjustment mechanism comprises a connecting plate located between the vehicle body and the wheels, one end of which is rotatably mounted on the rotating shaft, and the middle portion of which is fixedly connected with the wheel shaft of the wheels; a gear handle, one end of which is fixedly mounted on the connecting plate, and the other end of which is arranged in a limiting slot of the vehicle body; and a connecting rod, which is fixedly connected to the other end of the connecting plate and is used to connect the connecting plates on both sides of the wheels to link the synchronous adjustment of the positions of the wheels on both sides; the gear handle is adjusted upward or downward to reduce or increase the distance between the lowest end of the wheels in the vertical direction and the rotating shaft, so as to reduce or increase the ground clearance of the main brush.

[0011] In an embodiment, a plurality of limiting slots are arranged at equal intervals.

[0012] In an embodiment, the limiting slots are arranged on the mounting plates of the vehicle body.

[0013] In an embodiment, two mounting plates are arranged in mirror symmetry on the vehicle body, and a through hole for arranging the rotating shaft is arranged on the mounting plates, so that the main body of the main brush is located between the two mounting plates.

[0014] In an embodiment, a cover plate is arranged above the mounting plates.

[0015] As a second aspect, the application provides a height adjustment method of a hand-push type leaf sweeper, which is used to adjust the ground clearance of the main brush of the hand-push type leaf sweeper as described in the first aspect, and comprises the following steps:

[0016] S1, the universal wheel is in a free rotation state, and the gap between the universal wheel and the wheels is greater than or equal to 3 mm;

[0017] S2, when the hand-push type leaf sweeper is in a stationary state, the gear handle of the height adjustment mechanism and the universal wheel are simultaneously adjusted upward or downward and pressed downward for gear adjustment;

[0018] S3, when the gear handle enters a target limiting slot, the hand-push type leaf sweeper is tested by gently pushing the hand-push type leaf sweeper to test whether the universal wheel moves smoothly, and if yes, the gear adjustment is ended, and if not, the gear adjustment is continued.

[0019] In an embodiment, in the step S2, one hand holds the gear handle of the height adjustment mechanism and stably applies force to the wheels, so as to drive the gear handle to move into a target limiting slot, and the other hand simultaneously presses the universal wheel downward.

[0020] In one embodiment, in step S2, adjusting the gear shift handle upwards reduces the distance between the lowest point of the wheel and the axle in the vertical direction, decreases the height of the main brush off the ground, and triggers the damping buffer of the omnidirectional wheel to automatically offset part of the main brush's pressure against the ground; adjusting the gear shift handle downwards increases the distance between the lowest point of the wheel and the axle in the vertical direction, increases the height of the main brush off the ground, and automatically increases the tilt angle of the omnidirectional wheel to achieve automatic compensation assist.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The hand-push leaf sweeper provided by the present invention has a height adjustment mechanism that is simultaneously set on the rotating shaft of the main brush and the wheel axle, and a universal wheel is set behind the wheel. The wheel axle can be rotated manually around the rotating shaft as the rotation center, thereby adjusting the distance between the lowest point of the wheel and the rotating shaft in the vertical direction. This can realize multi-level adjustment of the height of the main brush off the ground, and perform automatic auxiliary assistance compensation after the height is adjusted to ensure smooth movement of the whole machine after the height is adjusted. This can improve the service life of the main brush, the cleaning cleanliness, and the purpose of smooth and labor-saving movement after the height of the main brush off the ground is adjusted.

[0023] 2. The height adjustment mechanism and caster wheel design provided by this invention result in fewer parts, easier installation and operation, and lower cost.

[0024] 3. The design of the connecting rod in this invention not only enables the synchronized adjustment of the wheel positions on both sides when adjusting the height adjustment mechanism on one side, but also allows for convenient real-time display of the current gear status;

[0025] 4. The design of the vehicle cover of this invention can, on the one hand, prevent the main brush from throwing the garbage out from the front of the vehicle body during operation, ensuring that the garbage can be collected in the dust collection box, and on the other hand, ensure the overall aesthetics of the cleaning equipment. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of a hand-push leaf sweeper.

[0027] Figure 2 Displayed as Figure 2 A schematic diagram of the front part of the CRRC body.

[0028] Figure 3 The diagram shows the mechanism inside the mounting plate.

[0029] In the figure: 10, vehicle body; 11, mounting plate; 111, through hole; 112, limiting slot; 113, arc-shaped hole; 12, dust collecting box; 13, vehicle cover; 20, push rod; 21, handle part; 22, mounting part; 30, main brush; 31, rotating shaft; 32, pinion; 40, wheel; 41, wheel shaft; 50, height adjusting mechanism; 51, connecting plate; 52, gear shifting handle; 53, connecting rod; 60, universal wheel. DETAILED DESCRIPTION

[0030] Please refer to Figures 1-3 The present application will be described in detail below with reference to specific embodiments. Other advantages and effects of the present application will be readily understood by those skilled in the art after reading the description.

[0031] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the present application are merely used to illustrate the content disclosed in the present application, to be understood and read by those skilled in the art, and do not have technical significance. Any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0032] Unless otherwise defined, the technical terms or scientific terms used herein should have the meanings commonly understood by those skilled in the art to which the present application belongs. The "one", "a" or "the" and similar words used in the present application do not represent quantity limitation, but only represent the existence of at least one. The words "including" or "containing" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. In the present application, the serial numbers of the components, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, the "connection" in the present application includes direct and indirect connections.

[0033] In order to avoid confusion with the present application, some technical features known in the art are not described.

[0034] As Figure 1 and Figure 2As shown, the present invention provides a hand-push leaf sweeper, including a vehicle body 10, a push rod 20, a main brush 30, wheels 40, a height adjustment mechanism 50, and casters 60. The push rod 20 is mounted on the vehicle body 10 and includes a handle portion 21 and a mounting portion 22. The handle portion 21 is located at the rear of the vehicle body 10 to facilitate the operator to push the vehicle body 10 forward from the rear. The mounting portion 22 is fixedly connected to the handle portion 21 and extends along the dust collection box 12 of the vehicle body 10 to the lower front of the vehicle body 10 for mounting the casters 60. The main brush 30 is rotatably mounted on the front of the vehicle body 10 via its rotating shaft 31. The wheels 40 are load-bearing wheels, connected to both ends of the rotating shaft 31, and arranged on the outer front of the vehicle body 10. By pushing the push rod 20, the operator can drive the wheels 40 to rotate, which in turn causes the main brush 30, in contact with the ground, to rotate, collecting fallen leaves, debris, and other garbage from the ground and sweeping them into the dust collection box 12. The height adjustment mechanism 50 is located on the rotating shaft 31 and the wheels 40, between the vehicle body 10 and the wheels 40. By manually adjusting the height adjustment mechanism 50, the wheel axle 41 of the wheels 40 rotates around the rotating shaft 31, adjusting the vertical distance between the lowest point of the wheels 40 and the rotating shaft 31, thereby adjusting the height of the main brush 30 off the ground. The caster wheel 60 is mounted on the mounting part 22 and located behind the wheel 40. The position of the caster wheel 60 on the mounting part 22 is adjustable to ensure that the gap between the caster wheel 60 and the wheel 40 is always ≥3mm, so as to avoid movement interference between the two. Specifically, the caster wheel 60 adopts a 360° rotating structure, which can reduce the steering resistance of the hand-push leaf sweeper and improve the mobility.

[0035] It should be noted that although the universal wheel 60 described in this embodiment is installed behind the wheel 40 by the push rod 20, in other embodiments, the universal wheel 60 can be directly installed on the vehicle body 10 by the universal wheel bracket, without having to be installed on the push rod 20.

[0036] Please combine Figure 3The vehicle body 10 includes two mounting plates 11, a dust collection box 12, and a cover 13. The two mounting plates 11 are arranged symmetrically in front of the vehicle body 10, and are provided with through holes 111 for the rotating shaft 31 to pass through, so that the main body (e.g., brush bristles) of the main brush 30 can be installed between the two mounting plates 11. At least one mounting plate 11 is provided with multiple limiting slots 112 that cooperate with the height adjustment mechanism 50 to form a multi-level wheel 40 position adjustment, thereby adjusting the height of the main brush 30 off the ground. The multiple limiting slots 112 can be arranged at equal intervals or non-equal intervals. When the multiple limiting slots 112 are arranged circumferentially with the rotating shaft 31 as the center, the equal interval arrangement of the multiple limiting slots 112 can ensure the consistency of each adjustment height. The dust collection box 12 is fixedly connected to two mounting plates 11 and is located at the rear of the vehicle body 10, that is, behind the main brush 30, for collecting fallen leaves, debris, and other garbage swept up by the main brush 30. The cover 13 is placed over the two mounting plates 11 to cover the main brush 30. This prevents the main brush 30 from throwing garbage out from the front of the vehicle body 10 during operation, ensuring that the garbage is collected in the dust collection box 12. It also maintains the overall aesthetics of the cleaning equipment.

[0037] The wheel axle 41 of the wheel 40 meshes with the small gear 32 at the end of the shaft 31 via a large gear (not shown in the figure) to achieve synchronous rotation of the wheel 40 and the shaft 31. The mounting plate 11 is also provided with an arc-shaped hole 113, which is used to accommodate the position adjustment of the wheel axle 41.

[0038] The height adjustment mechanism 50 includes a connecting plate 51, a shift handle 52, and a connecting rod 53. The rear end of the connecting plate 51 is rotatably mounted on the rotating shaft 31 and located between the mounting plate 11 and the pinion 32. The wheel axle 41 is fixedly mounted in the middle, and the front end is fixedly connected to the connecting rod 53. Two connecting plates 51 must be provided, with each connecting plate 51 positioned between the mounting plates 11 and the wheels 40 on either side. At least one connecting plate 51 has a shift handle 52, one end of which is fixedly mounted on the connecting plate 51; the other end passes through the limiting slot 112 and has an operating part for easy gripping by the operator. The connecting rod 53 is fixedly connected to the front end of the connecting plate 51 and connects the connecting plates 51 on both sides, so that when adjusting the height adjustment mechanism 50 on one side, the wheels 40 on both sides adjust their positions synchronously.

[0039] The height adjustment method of the present invention specifically includes the following steps:

[0040] S1. Allow the caster wheel 60 to rotate freely, and ensure that the gap between the caster wheel 60 and the wheel 40 is ≥3mm;

[0041] Specifically, first, confirm whether the caster wheel 60 is in a free-rotating state. If so, perform a gap check. If not, unlock the caster wheel 60 and then perform a gap check. Next, check whether the gap between the caster wheel 60 and the wheel 40 is ≥3mm. If so, proceed to step S2. If not, adjust the position of the caster wheel 60 and then proceed to step S2. When the gap between the caster wheel 60 and the wheel 40 is ≥3mm, it can be ensured that there will be no movement interference between the two during the subsequent adjustment process.

[0042] S2. When the hand-push leaf sweeper is stationary, the operator holds the operating part of the gear shifting handle 52 with one hand, with the thumb naturally fitting into the groove of the operating part, and applies force smoothly towards the outer wheel 40 to move the gear shifting handle 52 into the target limit slot 112; the other hand simultaneously presses down the mounting part 22 of the push rod 20 to ensure that the whole machine is subjected to balanced force when shifting gears.

[0043] When the gear shift handle 52 is adjusted upwards, the wheel axle 41 rotates upwards around the pivot 31, reducing the vertical distance between the lowest point of the wheel 40 and the pivot 31, decreasing the height of the main brush 30 off the ground, and increasing the ground contact pressure. At this time, the omnidirectional wheel 60 triggers damping buffering to automatically offset some of the pressure. When the gear shift handle 52 is adjusted downwards, the wheel axle 41 rotates downwards around the pivot 31, increasing the vertical distance between the lowest point of the wheel 40 and the pivot 31, increasing the height of the main brush 30 off the ground, and automatically increasing the tilt angle of the omnidirectional wheel 60, for example, by 15° for each gear, thus achieving automatic compensation assist from the omnidirectional wheel 60. When the gear shift handle 52 enters the target limit slot 112, a "click" positioning sound will be heard. At the same time, during gear shifting, the connecting rod 53 can conveniently display the current gear status in real time, for example, by observing whether the connecting rod 53 is flush with the target gear mark.

[0044] S3. When the gear shift lever 52 enters the target limit slot 112, gently push the device to test whether the universal wheel 60 moves smoothly. If it does, end the gear shifting; otherwise, continue shifting.

[0045] In addition, if excessive resistance is encountered during gear adjustment, it is necessary to check whether there is any foreign matter accumulation in the limit slot 112, and it is recommended to apply grease to the limit slot 112 every quarter for maintenance.

[0046] The hand-push leaf sweeper provided by this invention simultaneously sets the height adjustment mechanism 50 on the rotating shaft 31 of the main brush 30 and the wheel axle 41 of the wheel 40, and sets a universal wheel 60 behind the wheel 40. The distance between the lowest point of the wheel 40 and the rotating shaft 31 in the vertical direction can be adjusted manually to achieve multiple levels of adjustment of the height of the main brush 30 off the ground. Automatic auxiliary assistance compensation is provided after the height is adjusted to ensure smooth movement of the whole machine after the height is adjusted. This not only overcomes the problems of the main brush 30 contacting the ground in non-working sections, causing movement resistance and brush bristle wear, and the main brush 30 bristles not being able to make close contact with the ground after long-term use, affecting the sweeping effect, but also overcomes the problems that are easy to cause poor cleaning due to poor ground contact of the main brush 30 after the ground height is adjusted, or the problems that are difficult to move or require additional pushing force to push due to excessive ground contact pressure of the main brush 30.

[0047] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial applicability. The above embodiments are merely illustrative of the principles and effects of this invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A hand-push leaf sweeper, characterized in that, include Vehicle body; The main brush, whose shaft is rotatably mounted on the vehicle body; Two wheels are respectively connected to the two ends of the rotating shaft for transmission; A height adjustment mechanism is provided on both the pivot and the wheel, and is located between the vehicle body and the wheel; The swivel casters are located behind the wheels.

2. The hand-push leaf sweeper according to claim 1, characterized in that, The omnidirectional wheel is mounted on the vehicle body or on the mounting part of the push rod; the push rod is mounted on the vehicle body, and the mounting part extends to the lower front of the vehicle body.

3. The hand-push leaf sweeper according to claim 1 or 2, characterized in that, The height adjustment mechanism includes A connecting plate is located between the vehicle body and the wheel, with one end rotatably mounted on the axle and the middle part fixedly connected to the wheel axle. The gear shift lever is fixedly mounted on the connecting plate at one end and passed through the limiting slot of the vehicle body at the other end. A connecting rod is fixedly connected to the other end of the connecting plate and is used to connect the connecting plates on both sides of the wheels to synchronize the position adjustment of the wheels on both sides. Adjusting the gear shift handle up or down reduces or increases the distance between the lowest point of the wheel and the shaft in the vertical direction, thereby reducing or increasing the height of the main brush off the ground.

4. The hand-push leaf sweeper according to claim 3, characterized in that, The multiple limiting slots are set at equal intervals.

5. The hand-push leaf sweeper according to claim 3, characterized in that, The limiting slot is set on the mounting plate of the vehicle body.

6. The hand-push leaf sweeper according to claim 5, characterized in that, The two mounting plates are arranged symmetrically on the vehicle body, and are provided with through holes for the rotating shaft to pass through, so that the main body of the main brush is located between the two mounting plates.

7. The hand-push leaf sweeper according to claim 5, characterized in that, A cover plate is provided on top of the mounting plate.

8. A method for adjusting the height of a hand-push leaf sweeper, characterized in that, Adjusting the height of the main brush of the hand-push leaf sweeper as described in any one of claims 1 to 7 includes the following steps: S1. Allow the caster wheel to rotate freely, and ensure that the gap between the caster wheel and the wheel is ≥3mm; S2. When the hand-push leaf sweeper is stationary, simultaneously adjust the gear shift handle of the height adjustment mechanism upward or downward and press down the universal wheel to adjust the gear. S3. After the gear shifting handle enters the target limit slot, gently push the hand-push leaf sweeper to test whether the universal wheel moves smoothly. If it does, end the gear shifting; otherwise, continue shifting.

9. The height adjustment method according to claim 8, characterized in that, In step S2, one hand holds the gear shift handle of the height adjustment mechanism and applies force smoothly towards the wheel to move the gear shift handle into the target limit slot, while the other hand simultaneously presses down on the omnidirectional wheel.

10. The height adjustment method according to claim 8, characterized in that, In step S2, adjusting the gear shift handle upwards reduces the distance between the lowest point of the wheel and the axle in the vertical direction, decreases the height of the main brush off the ground, and triggers the damping buffer of the omnidirectional wheel to automatically offset part of the main brush's pressure against the ground; adjusting the gear shift handle downwards increases the distance between the lowest point of the wheel and the axle in the vertical direction, increases the height of the main brush off the ground, and automatically increases the tilt angle of the omnidirectional wheel to achieve automatic compensation assist.

Images