阅读说明：本技术 边刷齿轮箱、边刷组件及扫地机器人 (Side brush gear box, side brush assembly and sweeping robot ) 是由 刘旭阳 黄现安 胡海波 林海利 黄忠平 刘宇莹 于 2020-12-24 设计创作，主要内容包括：本申请涉及一种边刷齿轮箱、边刷组件及扫地机器人,边刷齿轮箱包括箱体,具有容纳腔；以及齿轮组,设于容纳腔内,齿轮组包括输入齿轮、中间齿轮组及输出齿轮,中间齿轮组包括同轴设置的第一中间齿轮和第二中间齿轮,输入齿轮与第一中间齿轮传动连接,第二中间齿轮与输出齿轮传动连接；其中,输入齿轮沿轴向朝向输出齿轮的端面的正投影位于输出齿轮内。本申请提供的边刷齿轮箱、边刷组件及扫地机器人,由于输入齿轮沿轴向朝向输出齿轮的端面的正投影位于输出齿轮内,因此,输入齿轮沿轴向无需占用输出齿轮以外的区域,齿轮排布合理,使齿轮组的结构更加紧凑,从而减小了箱体内部空间,进而使得边刷齿轮箱的占用空间小。(The application relates to a side brush gear box, a side brush assembly and a sweeping robot, wherein the side brush gear box comprises a box body and a containing cavity; the gear set is arranged in the accommodating cavity and comprises an input gear, a middle gear set and an output gear, the middle gear set comprises a first middle gear and a second middle gear which are coaxially arranged, the input gear is in transmission connection with the first middle gear, and the second middle gear is in transmission connection with the output gear; wherein, the orthographic projection of the input gear along the axial direction towards the end surface of the output gear is positioned in the output gear. The application provides a limit brush gear case, limit brush subassembly and robot of sweeping floor, because input gear is located output gear along the orthographic projection of axial towards output gear's terminal surface, consequently, input gear need not to occupy the region beyond output gear along the axial, and the gear is arranged rationally, makes the structure of gear train compacter to box inner space has been reduced, and then the occupation space that makes limit brush gear case is little.)

1. An edge brush gearbox (100), comprising:

a case (10) having an accommodation chamber (11); and

the gear set (20) is arranged in the accommodating cavity (11), the gear set (20) comprises an input gear (21), an intermediate gear set (22) and an output gear (23), the intermediate gear set (22) comprises a first intermediate gear (221) and a second intermediate gear (222) which are coaxially arranged, the input gear (21) is in transmission connection with the first intermediate gear (221), and the second intermediate gear (222) is in transmission connection with the output gear (23);

wherein an orthographic projection of the input gear (21) in an axial direction toward an end face of the output gear (23) is located within the output gear (23).

2. The side brush gearbox (100) according to claim 1, wherein an orthographic projection of a line connecting the axis of the output gear (23) and the axis of the intermediate gear set (22) towards the end face of the output gear (23) forms a projected line (a);

the projection connecting line (A) intersects with an orthographic projection of the input gear (21) toward the end face of the output gear (23) in the axial direction.

3. The side brush gearbox (100) according to claim 2, wherein an orthographic projection of the axis of the input gear (21) towards the end face of the output gear (23) is located on the projection line (a).

4. The side brush gearbox (100) according to claim 3, wherein the transmission ratio of the input gear (21) to the first intermediate gear (221) ranges from 3 to 5;

the transmission ratio range of the second intermediate gear (222) and the output gear (23) is 5-7;

the total transmission ratio range of the gear set is 18-27.

5. The side brush gearbox (100) according to claim 2, wherein the end face of the output gear (23) has a first centre line (B) perpendicular to the projected line (a);

an orthographic projection of the input gear (21) in the axial direction toward an end face of the output gear (23) is located on a side of the first center line (B) close to the second intermediate gear (222).

6. The side brush gearbox (100) according to claim 1, wherein an orthographic projection of a line connecting the axis of the output gear (23) and the axis of the intermediate gear set (22) towards the end face of the output gear (23) forms a projected line (a);

the intermediate gear set (22) has a first central plane (C) perpendicular to the projected line (A), and the input gear (21) and the output gear (23) are both located on one side of the first central plane (C).

7. The side brush gearbox (100) of claim 1, wherein the input gear (21) and the first intermediate gear (221) are both helical gears.

8. The side brush gearbox (100) of claim 1, wherein the output gear (23) and the second intermediate gear (222) are both spur gears.

9. An edge brush assembly (200) comprising an edge brush motor (210), an edge brush (220), and an edge brush gearbox (100) according to any of claims 1 to 8;

a first output shaft (2101) of the side brush motor (210) is connected with an input shaft (211) of the input gear (21), and a second output shaft (231) of the output gear (23) is connected with a rotating shaft (2201) of the side brush (220).

10. The side brush assembly (200) of claim 9, wherein the side brush motor (210) and the side brush (220) are located axially on both sides of the case (10);

the box body (10) is provided with a positioning groove (121), and the side brush motor (210) is placed in the positioning groove (121).

11. A sweeping robot comprising an edge brush assembly (200) according to claim 9 or 10.

Technical Field

The application relates to the technical field of cleaning equipment, in particular to an edge brush gearbox, an edge brush assembly and a floor sweeping robot.

Background

A floor sweeping robot is one of intelligent household appliances, and can automatically finish floor cleaning work in a room by means of certain artificial intelligence.

In the working process of the sweeping robot, the sweeping robot moves, and meanwhile, the garbage in front of the sweeping robot is cleaned to the lower side of the sweeping robot through rotation of the side brush, and then under the rotating action of a rolling brush assembly of the sweeping robot, dust is driven through a dust suction port to be adsorbed and cleaned.

However, the existing side brush gear box of the sweeping robot occupies a large space due to the unreasonable arrangement of the gear sets.

Disclosure of Invention

Based on this, it is necessary to provide a limit brush gear box, limit brush subassembly and robot of sweeping floor that the gear is arranged rationally to current limit brush gear box, because the gear train arranges unreasonablely, leads to the problem that occupation space is big.

An aspect of the application provides an limit brush gear case, includes:

a case having an accommodating chamber; and

the gear set is arranged in the accommodating cavity and comprises an input gear, a middle gear set and an output gear, the middle gear set comprises a first middle gear and a second middle gear which are coaxially arranged, the input gear is in transmission connection with the first middle gear, and the second middle gear is in transmission connection with the output gear;

wherein an orthographic projection of the input gear in an axial direction toward an end face of the output gear is located within the output gear.

Above-mentioned limit brush gear box, because the orthographic projection of input gear along the axial towards the terminal surface of output gear is located output gear, consequently, input gear need not to occupy the region beyond output gear along the axial, and the gear is arranged rationally, makes the structure of gear train compacter to box inner space has been reduced, and then makes limit brush gear box's occupation space little.

In one embodiment, a connecting line of the axis of the output gear and the axis of the intermediate gear set forms a projection connecting line towards the orthographic projection of the end surface of the output gear;

the projection connecting line intersects with an orthographic projection of the input gear toward the end face of the output gear in the axial direction. The input gear can be further closed to the inside of the output gear, namely the central axis of the input gear is closed to the central plane of the gear set, and then the central axis of the side brush motor connected with the input gear can be further closed to the central plane of the gear set, so that the occupied space of the side brush assembly is reduced.

In one embodiment, an orthographic projection of the axis of the input gear toward the end face of the output gear is located on the projection line. The central axis of the input gear can be positioned in the central plane of the gear set, and further the central axis of the side brush motor connected with the input gear is positioned in the central plane of the gear set, so that the occupied space of the side brush assembly is smaller.

In one embodiment, the transmission ratio of the input gear to the first intermediate gear ranges from 3 to 5;

the transmission ratio range of the second intermediate gear and the output gear is 5-7;

the total transmission ratio range of the gear set is 18-27. By setting the transmission ratios of all stages and the total transmission ratio, the orthographic projection of the axis of the input gear facing the end face of the output gear can be ensured to be positioned on the projection connecting line while the required rotating speed is provided for the side brush.

In one embodiment, the end face of the output gear has a first central line perpendicular to the projection line;

the orthographic projection of the end face of the input gear, which faces the output gear along the axial direction, is positioned on one side, close to the second intermediate gear, of the first center line. Positional interference between the input gear and the second output shaft of the output gear in the radial direction can be avoided as much as possible.

In one embodiment, a connecting line of the axis of the output gear and the axis of the intermediate gear set forms a projection connecting line towards the orthographic projection of the end surface of the output gear;

the middle gear set is provided with a first central plane perpendicular to the projection connecting line, and the input gear and the output gear are both positioned on one side of the first central plane. The transmission ratio is ensured, and meanwhile, the occupied space of the output gear can be reduced as much as possible.

In one embodiment, the input gear and the first intermediate gear are both helical gears. The bevel gear has the advantages of stable transmission and low noise, so that the transmission stability can be improved and the noise can be reduced at the input stage of the transmission of the side brush motor and the gear set.

In one embodiment, the output gear and the second intermediate gear are both spur gears. The straight gear has strong bearing capacity and good durability and can improve the working stability of the side brush.

In another aspect of the present application, an edge brush assembly is further provided, which includes an edge brush motor, an edge brush, and the above-mentioned edge brush gear box;

and a first output shaft of the side brush motor is connected with an input shaft of the input gear, and a second output shaft of the output gear is connected with a rotating shaft of the side brush.

Above-mentioned limit brush subassembly, because the orthographic projection of the input gear of limit brush gear case towards the terminal surface of output gear along the axial is located output gear, consequently, input gear need not to occupy the region beyond output gear along the axial, and the gear is arranged rationally, makes the structure of gear train compacter to box inner space has been reduced, and then makes the occupation space of limit brush gear case little, the occupation space of limit brush subassembly is little.

In one embodiment, the side brush motor and the side brush are positioned on two sides of the box body along the axial direction;

the box is equipped with the constant head tank, the limit brush motor is placed in the constant head tank. The mode of setting up the constant head tank is simple, and the limit brush motor location is reliable.

In another aspect of the application, a sweeping robot is also provided, which includes the above-mentioned side brush assembly.

Above-mentioned robot of sweeping floor because the orthographic projection of input gear along the axial towards the terminal surface of output gear is located output gear, consequently, input gear need not to occupy the region beyond output gear along the axial, and the gear is arranged rationally, makes the structure of gear train compacter to box inner space has been reduced, and then the occupation space who makes limit brush gear case is little, and the robot of sweeping floor is more miniaturized.

Drawings

FIG. 1 is a schematic view of an edge brush assembly having an edge brush gearbox according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the edge brush assembly shown in FIG. 1;

FIG. 3 is a cross-sectional view of the gear assembly of the edge brush assembly of FIG. 1;

FIG. 4 is a schematic top view of the gear assembly of the edge brush assembly of FIG. 1.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

FIG. 1 illustrates a schematic structural view of an edge brush assembly having an edge brush gear box according to an embodiment of the present application, and FIG. 2 illustrates an exploded schematic structural view of the edge brush assembly shown in FIG. 1; FIG. 3 is a cross-sectional schematic view of the gear assembly of the edge brush assembly of FIG. 1. For the purpose of illustration, the drawings show only the structures associated with the embodiments of the application.

Referring to the drawings, an embodiment of the present application provides an edge brush gearbox 100 including a gearbox body 10 and a gear set 20. In the embodiment of the present application, the side brush gear box 100 serves as a transmission member between the side brush motor 210 and the side brush 220, and can transmit the power output by the side brush motor 210 to the side brush 220 and make the side brush 220 obtain a corresponding rotation speed. Specifically, the side brush gearbox 100 may be used for a sweeping robot, and may also be used for other devices that can be applied to the side brush gearbox 100, which is not limited herein.

The box body 10 is provided with an accommodating cavity 11, the gear set 20 is arranged in the accommodating cavity 11, the gear set 20 comprises an input gear 21, an intermediate gear set 22 and an output gear 23, the intermediate gear set 22 comprises a first intermediate gear 221 and a second intermediate gear 222 which are coaxially arranged, the input gear 21 is in transmission connection with the first intermediate gear 221, and the second intermediate gear 221 is in transmission connection with the output gear 23. Specifically, a first output shaft 2101 of the side brush motor 210 is connected to an input shaft 211 of the input gear 21, and a second output shaft 231 of the output gear 23 is connected to a rotation shaft 2201 of the side brush 220. In the embodiment of the present application, the axis of the input gear 21, the axis of the central gear set 22, and the axis of the output gear 23 in the gear set 20 are parallel two by two.

As shown in fig. 4, in which an orthogonal projection of the input gear 21 in the axial direction toward the end face of the output gear 23 is located inside the output gear 23.

It should be noted that when the output gear 23 is an external gear, the orthographic projection of the input gear 21 in the axial direction toward the end face of the output gear 23 being located within the output gear 23 means that the orthographic projection of the input gear 21 in the axial direction toward the end face of the output gear 23 being located within the end face of the output gear 23. On the other hand, when the output gear 23 is an internal gear, the orthographic projection of the input gear 21 toward the end surface of the output gear 23 along the axial direction is located inside the output gear 23, which means that the orthographic projection of the input gear 21 toward the end surface of the output gear 23 along the axial direction is located in a plane bounded by the outer boundary of the end surface of the output gear 23.

Because the orthographic projection of the end face of the input gear 21 facing the output gear 23 along the axial direction is positioned in the output gear 23, the input gear 21 does not need to occupy the area outside the output gear 23 along the axial direction, the arrangement of the gears is reasonable, the structure of the gear set 20 is more compact, the internal space of the box body 10 is reduced, and the occupied space of the side brush gear box 100 is small.

Referring again to fig. 2, in some embodiments, the housing 10 includes a first housing 12 and a second housing 13, and the first housing 12 and the second housing 13 can be axially assembled to form the accommodating chamber 11. In this manner, positioning and installation of the gear set 20 is simplified.

Further, the side brush motor 210 and the side brush 220 are located at both sides of the casing 10 in the axial direction. Thus, the positions of the two do not interfere with each other. Specifically, the side brush motor 210 is mounted on one side of the first casing 12 facing away from the second casing 13 in the axial direction, and the side brush 220 is located on one side of the second casing 13 facing away from the first casing 12 in the axial direction.

Furthermore, the box 10 is provided with a positioning groove 121, and the side brush motor 210 is disposed in the positioning groove 121. Specifically, the positioning groove 121 is provided on a side of the first casing 12 facing away from the second casing 13 in the axial direction. In some embodiments, the inner circumferential wall of the positioning groove 121 is matched with the outer circumferential wall of the side brush motor 210, so that the side brush motor 210 is positioned in the positioning groove 121. The mode of setting up constant head tank 121 is simple, and limit brush motor 210 location is reliable.

Referring again to fig. 4, in some embodiments, the input gear 21 and the first intermediate gear 221 are both helical gears. The helical gear has the advantages of smooth transmission and low noise, so that the transmission stability can be improved and the noise can be reduced at the input stage of the transmission of the side brush motor 210 and the gear set 20.

In some embodiments, the output gear 23 and the second intermediate gear 222 are both spur gears. In the output stage of the transmission of the gear set 20, the straight gear has strong bearing capacity and good durability and can improve the working stability of the side brush 220 because of being connected with the side brush 220, and in addition, the processing of the straight gear is simple, and the production cost is also reduced.

In some embodiments, an orthographic projection of a line connecting the axis of the output gear 23 and the axis of the intermediate gear set 20 toward the end face of the output gear forms a projected line a that intersects an orthographic projection of the input gear 21 axially toward the end face of the output gear 23. It will be appreciated that the projected line A and the axis of any one of the gears of the gear set 20 may form a central plane of the gear set 20. In this way, the input gear 21 can be further drawn towards the inside of the output gear 23, that is, the central axis of the input gear 21 is drawn towards the central plane of the gear set 20, and further the central axis of the side brush motor 210 connected with the input gear 21 can be further drawn towards the central plane of the gear set 20, so as to reduce the occupied space of the side brush assembly 200.

In a preferred embodiment, the orthographic projection of the axis of the input gear 21 towards the end face of the output gear 23 is located on the projection line a. In this way, the central axis of the input gear 21 is located in the central plane of the gear set 20, and the central axis of the side brush motor 210 connected to the input gear 21 is located in the central plane of the gear set 20, so that the occupied space of the side brush assembly 200 is smaller.

Specifically, in one embodiment, the transmission ratio of the input gear 21 to the first intermediate gear 221 ranges from 3 to 5, the transmission ratio of the second intermediate gear 222 to the output gear 23 ranges from 5 to 7, and the total transmission ratio of the gear set 20 ranges from 18 to 27. Thus, by setting the gear ratios of the respective stages and the total gear ratio, it is possible to ensure that the orthographic projection of the axis of the input gear 21 toward the end face of the output gear 23 is positioned on the projection line a while providing the side brush 220 with the required rotation speed.

In some embodiments, the end face of the output gear 23 has a first center line B perpendicular to the projection line a, and an orthographic projection of the input gear 21 in the axial direction toward the end face of the output gear 23 is located on a side of the first center line B close to the second intermediate gear 222. In this way, positional interference between the input gear 21 and the second output shaft 231 of the output gear 23 in the radial direction can be avoided as much as possible.

In some embodiments, an orthographic projection of a line connecting the axis of the output gear 23 and the axis of the intermediate gear set 20 toward the end face of the output gear forms a projected line a, the intermediate gear set 20 has a first central plane C perpendicular to the projected line a, and the input gear 21 and the output gear 23 are both located on one side of the first central plane C. In this way, while the transmission ratio is ensured, the occupied space of the output gear 23 can be reduced as much as possible.

Referring to fig. 1 and 2 again, based on the same inventive concept, the present application further provides an edge brush assembly 200, which includes an edge brush motor 210, an edge brush 220, and the above-mentioned edge brush gearbox 100.

A first output shaft 2101 of the side brush motor 210 is connected to the input shaft 211 of the input gear 21, and a second output shaft 231 of the output gear 23 is connected to the rotation shaft 2201 of the side brush 220. In the embodiment of the present application, the axis of the input gear 21, the axis of the central gear set 22, and the axis of the output gear 23 in the gear set 20 are parallel two by two.

Based on the same inventive concept, the application also provides a sweeping robot, which comprises the side brush assembly 200.

Specifically, the robot of sweeping the floor includes the robot main part of sweeping the floor, and the robot subassembly of sweeping the floor includes the casing, and the casing has the dust absorption mouth, and limit brush subassembly 200 installs in the casing, and lies in the place ahead of dust absorption mouth along the advancing direction of the robot of sweeping the floor, and limit brush 220 can stretch in casing and ground contact, can drive the dust when limit brush 220 is rotatory and draw close to the dust absorption mouth.

The utility model provides a limit brush gearbox 100, limit brush subassembly 200 and robot of sweeping floor have following beneficial effect:

because the orthographic projection of the end face of the input gear 21 towards the output gear 23 along the axial direction is positioned in the output gear 23, the input gear 21 does not need to occupy the area outside the output gear 23 along the axial direction, the gear arrangement is reasonable, the structure of the gear set 20 is more compact, the internal space of the box body 10 is reduced, the occupied space of the side brush gear box 100 is small, the occupied space of the side brush assembly 200 is small, and the floor sweeping robot is more miniaturized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.