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Robotic cleaning device

A technology for cleaning equipment and robots, applied in the direction of cleaning equipment, cleaning machinery, machine parts, etc., can solve the problems of poor robot position control, increased risk of wheel sliding or rotation, etc.

Active Publication Date: 2018-12-21
AB ELECTROLUX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the risk of the wheels slipping or spinning increases, and the positional control of the robot is correspondingly worsened

Method used

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Examples

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Embodiment Construction

[0049] A robotic cleaning device will be described below comprising at least one drive wheel and first and second spring members associated with the at least one drive wheel. The same reference numerals will be used to denote the same or similar structural features.

[0050] figure 1 A front view of the robotic cleaning device 10 is schematically represented in a lowered position. The robotic cleaning device 10 comprises two drive wheels 12 and a main body 16 for driving the robotic cleaning device 10 on a surface 14 to be cleaned. The gap between body 16 and surface 14 may be adjusted as will be described below.

[0051] The drive wheels 12 may be driven collectively to drive the robotic cleaning device 10 in a forward or backward direction, or independently to turn the robotic cleaning device 10 . For example, one drive wheel 12 can be driven forward and the other drive wheel 12 can be driven backward, so that the robotic cleaning device 10 basically turns on a certain po...

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PUM

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Abstract

Robotic cleaning device (10) comprising a main body (16); at least one drive wheel (12) for driving the robotic cleaning device (10) on a horizontal ground surface (14); at least one linking member (44) rotationally coupled to the main body (16) about a suspension axis (54) and rotationally supporting the at least one drive wheel (12) about a drive wheel axis (56) such that by rotating the linkingmember (44) about the suspension axis (54) in a first direction (58), at least a section of the main body (16) can be raised from a lowered position, closer to the ground surface (14), to a raised position, further away from the ground surface (14); and a first spring member (46) and a second spring member (48) each arranged to provide a moment on the linking member (44) about the suspension axis(54) in the first direction (58) to press the at least one drive wheel (12) towards the ground surface (14); wherein the moment provided by the first spring member (46) is higher in the lowered position than in the raised position and the moment provided by the second spring member (48) is higher in the raised position than in the lowered position.

Description

technical field [0001] The present invention relates generally to robotic cleaning devices. In particular, a robotic cleaning device is provided comprising at least one drive wheel and first and second spring members associated with the at least one drive wheel. Background technique [0002] Some robotic cleaning equipment, such as vacuum cleaning robots, use tension spring suspensions for the drive wheels. Spring force helps travel over thick carpet and climb over door sills, power cables and other objects. [0003] Furthermore, some robotic cleaning devices rely partially or entirely on odometry, ie, using wheel rotation as feedback to control the position of the robot. If the wheels slide on the running surface, the positional control of the robot may be poor. [0004] WO 2014151501 A1 discloses a mobile surface cleaning robot in which each drive wheel is rotatably supported by a drive wheel suspension arm having a first end pivotally coupled to the robot body and a s...

Claims

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Application Information

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IPC IPC(8): A47L9/00A47L11/40
CPCA47L9/009A47L11/4061A47L11/4063A47L2201/04A47L11/4058
Inventor J·思蒂M·温纳施特罗姆
Owner AB ELECTROLUX