Reducing rolling brush

Abstract

The utility model relates to the technical field of motor sweeper parts, in particular to a reducing rolling brush. A positioning straight plate extends in the direction of the plane where the axis is located; the inner side of the rolling brush is provided with an inner hole allowing the spindle to penetrate through, the diameter of the inner hole is larger than that of the spindle, the inner wall of the inner hole is provided with a positioning groove matched with the positioning straight plate in shape, the depth of the positioning groove is larger than the length of the positioning straight plate, and the radius of the inner hole is smaller than the sum of the radius of the spindle and the length of the positioning straight plate; the end covers are arranged at the two ends of the main shaft and used for pressing the rolling brush on the main shaft so that the rolling brush cannot slide on the main shaft along the axis of the main shaft. The rolling brush can slide on the positioning straight plate through the positioning groove, so that the rolling brush has a jumping allowance with the height of a on the main shaft, and buffering allowance is provided for cleaning uneven road surfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of sweeper components, in particular to a variable diameter roller brush. Background Art

[0002] The roller brush is one of the common parts on the road sweeper. It is usually placed in the front or rear of the road sweeper. The motor drives the roller brush to rotate and sweep the dirt on the road surface into the collection device in the road sweeper. On urban roads, the road surface to be swept may be damaged, resulting in uneven road surface. Therefore, variable diameter roller brushes designed to address this phenomenon have appeared in the prior art, such as the new type of roller brush with adjustable diameter for sweeping vehicles published in Chinese patent application publication number: CN111636347A on September 8, 2020, which includes two roller brush sealing plates, and an adjusting screw is rotatably installed in the middle of the two roller brush sealing plates. The adjusting screw is provided with two threaded sections with opposite thread rotation directions, and an adjusting sleeve is threadedly connected to the threaded section. A plurality of sleeve hinge seats are evenly distributed on the outer periphery of the adjusting sleeve, and an adjusting rod is correspondingly hinged on each left sleeve hinge seat, and each adjusting rod is inclined toward the left end of the adjusting screw. A roller brush mounting frame is connected to each adjusting rod, and a plurality of strip roller brushes are installed on the outside of each roller brush mounting frame; after the roller brush has been used for a period of time, the bristles are greatly worn and the length of the bristles becomes shorter. At this time, the degree of fit between the roller brush and the ground is poor. Therefore, the diameter of the roller brush is increased by rotating the adjusting screw, so that the degree of fit between the bristles and the ground is increased, thereby improving the cleaning effect. However, this design requires adjusting the diameter of the roller brush by turning the adjusting screw, so that the fit between the bristles and the ground is increased, and manual adjustment is required every time the road surface conditions are different. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to:

[0004] 1. Provide a variable diameter roller brush, which can automatically adjust the distance between the roller brush and the road surface according to the road surface conditions when the sweeper is in continuous operation.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a variable diameter roller brush, comprising:

[0006] The main shaft has a positioning straight plate extending along the direction of the axis surface;

[0007] The roller brush has an inner hole for the spindle to pass through, the diameter of the inner hole is larger than the diameter of the spindle, a positioning groove matching the shape of the positioning straight plate is arranged on the inner wall of the inner hole, the depth of the positioning groove is larger than the length of the positioning straight plate, and the radius of the inner hole is smaller than the radius of the spindle plus the length of the positioning straight plate;

[0008] The end covers are arranged at both ends of the main shaft and are used to press the roller brush onto the main shaft so that the roller brush will not slide on the main shaft along the axis of the main shaft.

[0009] In the present technical solution, the roller brush can slide on the positioning straight plate through the positioning groove. When the roller brush is in a suspended state, the relative position relationship between the roller brush and the main shaft is as follows. When the positioning straight plate is in a vertical state and is located above the main shaft, the positioning straight plate completely enters the positioning groove. When the positioning straight plate is in a vertical state and is located below the main shaft, the positioning straight plate will not completely disengage from the positioning groove due to size limitations. During the process of the positioning straight plate rotating 180° from below the main shaft to above the main shaft, the relative distance between the positioning straight plate and the positioning groove should not change during the first 90° process, and the relative distance between the positioning straight plate and the positioning groove gradually decreases during the second 90° process until the positioning straight plate completely enters the positioning groove. The maximum relative height difference between the roller brush and the main shaft will change from a to 0 and then to a.

[0010] When the roller brush is in contact with the ground surface, the roller brush has a buffer margin of height a in the vertical direction to adapt to the unevenness of the ground.

[0011] Optionally, there are at least two positioning grooves arranged on the inner wall of the inner hole, and the two positioning grooves are symmetrically arranged on the inner wall of the inner hole. There are two positioning straight plates, and the two positioning straight plates are symmetrically arranged on the main shaft relative to the main shaft axis.

[0012] Through the symmetrical arrangement of the positioning straight plates, the roller brush has two positioning straight plates to position it during the rotation process, so that the device as a whole is more stable, the positioning straight plates are subjected to less pressure during operation, which helps to extend the overall life of the equipment.

[0013] Optionally, there are several roller brushes, two of the positioning straight plates form a group corresponding to one roller brush, and several roller brushes are sequentially sleeved on the main shaft through the corresponding positioning straight plates.

[0014] By setting up several roller brushes and coordinating with corresponding positioning straight plates, it can independently adapt to the surface height of different areas.

[0015] Optionally, there are six positioning grooves arranged on the inner wall of the inner hole, and the positioning grooves are equidistantly arranged on the inner wall of the inner hole.

[0016] Specifically, the angle between adjacent positioning grooves is 60°, and each roller brush has six positioning grooves arranged in a hexagonal shape. The positioning straight plate corresponding to each roller brush can be designed at different angles, so that the roller brush has different runout margins when adapting to the unevenness of the ground.

[0017] Optionally, a plurality of bristles are arranged on the outer surface of the roller brush, and the bristles are arranged in a "V" shape on the outer surface of the roller brush.

[0018] Optionally, a plurality of the positioning straight plates are symmetrically arranged on the main shaft with the middle portion of the main shaft as the axis.

[0019] The symmetrically arranged positioning straight plates help to keep the center of gravity stable when the roller brush changes diameter during operation.

[0020] As an optional solution, a contact plate can also be provided on the outer surface of the roller brush. The contact plate is arranged in a circular shape on the outer surface of the roller brush and is mainly used for contacting the ground with a small contact area, so that most of the bristles on the roller brush can be at a certain distance from the ground to achieve a better cleaning effect.

[0021] Optionally, the contact plate is arranged in a "bow" shape on the outer surface of the roller brush, and the bristles are arranged around the contact plate.

[0022] The utility model has the beneficial technical effect that the roller brush can slide on the positioning straight plate through the positioning groove, so that the roller brush has a jumping margin of a height on the main shaft, providing a buffer margin for cleaning uneven road surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the utility model after the components are dispersed;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the roller brush in the utility model;

[0026] Figure 4 It is a schematic diagram of the motion state of the utility model.

[0027] Figure numerals: 1-main shaft, 2-positioning straight plate, 3-rolling brush, 4-inner hole, 5-positioning groove, 6-bristles, 7-end cover. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] Reference Figure 1-3 As shown, a variable diameter roller brush comprises:

[0030] The main shaft 1 has twelve groups of positioning straight plates 2 extending along the axis direction, and each group has two positioning straight plates 2 arranged symmetrically. From the left side to the right side of the main shaft 1, the initial angles of each group of positioning straight plates 2 are 0°, 60°, 120°, 0°, 60°, 120°, 120°, 60°, 0°, 120°, 60°, and 0°.

[0031] There are twelve roller brushes 3, which are sleeved on the main shaft 1 in sequence. Each roller brush 3 has an inner hole 4 for the main shaft 1 to pass through on its inner side. The diameter of the inner hole 4 is larger than the diameter of the main shaft 1. Six positioning grooves 5 that match the shape of the positioning straight plate 2 are arranged on the inner wall of the inner hole 4. The angle between adjacent positioning grooves 5 is 60°, corresponding to the three angles of the positioning straight plate 2 on the main shaft 1. The depth of the positioning groove 5 is greater than the length of the positioning straight plate 2, and the radius of the inner hole 4 is smaller than the radius of the main shaft 1 plus the length of the positioning straight plate 2 to ensure that the positioning groove 5 will not fall off the positioning straight plate 2 during the rotation process. A number of bristles 6 are arranged on the outer surface of the roller brush 3, and the bristles 6 are arranged in a "V" shape on the outer surface of the roller brush 3 as a whole.

[0032] The end cover 7 is connected to both ends of the main shaft 1 by bolts, and is used to press the roller brush 3 onto the main shaft 1 so that the roller brush 3 does not slide on the main shaft 1 along the axis of the main shaft 1 .

[0033] refer to Figure 4 The roller brush 3 can slide on the positioning straight plate 2 through the positioning groove 5. When the roller brush 3 is in a suspended state, the relative position relationship between the roller brush 3 and the main shaft 1 is as follows:

[0034] When the positioning straight plate 2 is in a vertical state and in a vertical position, the positioning straight plate 2 completely enters the positioning groove 5. At this time, the roller brush 3 falls to the lowest height.

[0035] During the process of the positioning straight plate 2 rotating 180° from the vertical position, the relative distance between the positioning straight plate 2 and the positioning groove 5 should not change during the first 90°, but the roller brush 3 will be gradually lifted by the main shaft 1 to the highest height.

[0036] During the last 90°, the roller brush 3 falls under the influence of gravity, and the relative distance between the opposite positioning straight plate 2 and the positioning groove 5 gradually decreases until the opposite positioning straight plate 2 completely enters the positioning groove 5. At this time, the roller brush 3 is at the lowest height.

[0037] When the roller brush 3 is in contact with the ground surface and the height of the protrusion on the ground surface is less than a, the roller brush 3 will be in contact with the ground surface for a part of the time during the rotation process to complete the adaptation to the uneven ground surface.

[0038] When the aforementioned bristles 6 are hard bristles 6 , the ends of the bristles 6 can also be regarded as the surface of the roller brush 3 in contact with the ground surface, which can achieve a better cleaning effect.

[0039] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A variable diameter roller brush, characterized in that: include: The main shaft has a positioning straight plate extending along the direction of the axis surface; The roller brush has an inner hole for the spindle to pass through, the diameter of the inner hole is larger than the diameter of the spindle, a positioning groove matching the shape of the positioning straight plate is arranged on the inner wall of the inner hole, the depth of the positioning groove is larger than the length of the positioning straight plate, and the radius of the inner hole is smaller than the radius of the spindle plus the length of the positioning straight plate; The end covers are arranged at both ends of the main shaft and are used to press the roller brush onto the main shaft so that the roller brush will not slide on the main shaft along the axis of the main shaft.

2. The variable diameter roller brush according to claim 1, characterized in that: There are at least two positioning grooves arranged on the inner wall of the inner hole, and the two positioning grooves are symmetrically arranged on the inner wall of the inner hole. There are two positioning straight plates, and the two positioning straight plates are symmetrically arranged on the main shaft relative to the main shaft axis.

3. The variable diameter roller brush according to claim 2, characterized in that: There are a plurality of roller brushes, two positioning straight plates form a group corresponding to one roller brush, and a plurality of roller brushes are sequentially sleeved on the main shaft through the corresponding positioning straight plates.

4. The variable diameter roller brush according to claim 3, characterized in that: There are six positioning grooves arranged on the inner wall of the inner hole, and the positioning grooves are arranged on the inner wall of the inner hole at equal intervals.

5. A variable diameter roller brush according to any one of claims 1 to 4, characterized in that: A plurality of bristles are arranged on the outer surface of the roller brush, and the bristles are arranged in a "V" shape on the outer surface of the roller brush.

6. A variable diameter roller brush according to claim 3 or 4, characterized in that: A plurality of positioning straight plates are symmetrically arranged on the main shaft with the middle part of the main shaft as the axis.

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