WO2020078441A1 - 齿轮箱和智能清洁设备 - Google Patents

齿轮箱和智能清洁设备 Download PDF

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Publication number
WO2020078441A1
WO2020078441A1 PCT/CN2019/111765 CN2019111765W WO2020078441A1 WO 2020078441 A1 WO2020078441 A1 WO 2020078441A1 CN 2019111765 W CN2019111765 W CN 2019111765W WO 2020078441 A1 WO2020078441 A1 WO 2020078441A1
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WO
WIPO (PCT)
Prior art keywords
oil
support surface
contact surface
rotatable member
bearing
Prior art date
Application number
PCT/CN2019/111765
Other languages
English (en)
French (fr)
Inventor
杨帆
Original Assignee
北京石头世纪科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京石头世纪科技股份有限公司 filed Critical 北京石头世纪科技股份有限公司
Priority to EP19872692.9A priority Critical patent/EP3854285A4/en
Publication of WO2020078441A1 publication Critical patent/WO2020078441A1/zh
Priority to US17/232,382 priority patent/US20210228034A1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0405—Driving means for the brushes or agitators
    • A47L9/0411—Driving means for the brushes or agitators driven by electric motor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/24—Floor-sweeping machines, motor-driven
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/28—Floor-scrubbing machines, motor-driven
    • A47L11/282—Floor-scrubbing machines, motor-driven having rotary tools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4063—Driving means; Transmission means therefor
    • A47L11/4069—Driving or transmission means for the cleaning tools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0427—Gearing or transmission means therefor
    • A47L9/0433—Toothed gearings
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0455—Bearing means therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0472—Discs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0477—Rolls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/128—Porous bearings, e.g. bushes of sintered alloy
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2201/00—Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2201/00—Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
    • A47L2201/06—Control of the cleaning action for autonomous devices; Automatic detection of the surface condition before, during or after cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F16C17/243—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to temperature and heat, e.g. for preventing overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2314/00—Personal or domestic articles, e.g. household appliances such as washing machines, dryers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02069—Gearboxes for particular applications for industrial applications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings

Definitions

  • This application relates to the field of cleaning tools, in particular to a gear box and intelligent cleaning equipment.
  • mobile intelligent cleaning equipment is mostly equipped with a gear box to transmit the power of the driving equipment to the cleaning device after speed change, so that the cleaning device can perform the cleaning function at a suitable rotation speed.
  • oil-containing bearings are used to support rotating components such as output gears to reduce wear.
  • the rotating speed of rotating parts is usually high, and some can reach 22.5 rpm.
  • the high-speed rotation causes the contact surface between the rotating parts and the oil-bearing bearing to generate greater noise and higher temperature rise, which not only affects the user's experience, but also reduces the service life of the components in the gear box.
  • gear box for an intelligent cleaning device, the gear box includes:
  • a rotatable member capable of rotating around the axis of rotation to transmit power, the rotatable member having a contact surface
  • An oil-bearing bearing the oil-bearing bearing is fixedly arranged and has a support surface, and the oil-bearing bearing contacts the contact surface of the rotatable member through the support surface to support the rotation of the rotatable member relative to the oil-bearing bearing;
  • At least one of the contact surface and the support surface is provided with a concave portion.
  • a recessed portion is provided on at least one of the contact surface and the support surface that are in contact with each other and relatively moved, thereby reducing the surface area where the contact surface and the support surface contact each other, thereby effectively The noise and temperature rise caused by the relative rotation of the rotatable member and the oil bearing are reduced.
  • the recessed portion is provided on the support surface.
  • the recess is provided on the contact surface.
  • both the contact surface and the support surface are provided with the recessed portion.
  • the recessed portion includes a plurality and is evenly distributed around the rotation axis.
  • the rotatable member is an output gear
  • the oil-bearing bearing supports the output gear at the end of the output gear along the rotation axis.
  • the output gear is made of plastic.
  • one of the oil-containing bearings is provided on each side of the output gear opposite to the rotation axis.
  • the recessed portion includes a plurality and is evenly distributed around the rotation axis.
  • an intelligent cleaning device is further provided.
  • the intelligent cleaning device includes any gear box as described above, and the gear box is respectively driven by the intelligent cleaning device.
  • the device is connected to the cleaning brush to transmit the driving force of the driving device to the cleaning brush.
  • the gear box is provided with a recessed portion on at least one of the contact surface and the support surface that are in contact with each other and relatively moved, thereby reducing the contact between the contact surface and the support surface Surface area, thereby effectively reducing the noise and temperature rise caused by the relative rotation of the rotatable member and the oil-containing bearing.
  • FIG. 1 is a perspective view of an intelligent cleaning device according to an embodiment of the present application.
  • FIG. 2 is another perspective view of the smart cleaning device shown in FIG. 1;
  • FIG. 3 is an exploded view of a gear box according to an embodiment of the present application.
  • FIG. 4 and 5 are perspective views of the output gears of the gearbox shown in FIG. 3;
  • FIG. 6 is a schematic diagram of providing recesses on the support surface and / or contact surface.
  • the smart cleaning device shown in the embodiments of the present application may be a sweeping robot, a mopping robot, a robot with an integrated sweeping machine, etc.
  • the smart cleaning device is a cleaning robot with an integrated sweeping machine.
  • Intelligent cleaning equipment mainly includes cleaning system, perception system, control system, drive system, energy system and human-computer interaction system.
  • the various systems coordinate with each other to enable the intelligent cleaning equipment to move autonomously to achieve the cleaning function.
  • 1 and 2 exemplarily show a perspective view of a smart cleaning device provided according to an embodiment of the present application. From the outside, the smart cleaning device mainly includes the device body 1. In the smart cleaning device, functional elements and the like constituting the above systems are integrated in the device body 1.
  • the device body 1 has an approximately circular shape (both front and rear are circular), which includes an upper cover 11, a chassis 12, and a middle frame disposed between the upper cover 11 and the chassis 12 13.
  • the middle frame 13 serves as a basic framework for setting various functional elements.
  • the upper cover 11 and the chassis 12 respectively cover the upper and lower surfaces of the middle frame 13 to protect the internal components and enhance the aesthetics of the smart cleaning equipment.
  • the main body of the device may also have other shapes, including but not limited to an approximately D-shaped front and back circle.
  • the driving system is used to provide driving force for the autonomous movement of the intelligent cleaning system and the cleaning function of the cleaning system.
  • the sensing system is used for intelligent cleaning equipment to sense the external environment, such as terrain, and provides various position information and motion status information of the machine to the control system. Based on this information, the control system comprehensively judges the current working state of the smart cleaning equipment (such as crossing the threshold, putting on the carpet, located on the cliff, above or below, stuck, dust box full, picked up, etc.) The situation gives a specific next action strategy. Further, the control system can plan the most efficient and reasonable cleaning path and cleaning method based on the real-time map information, which greatly improves the work efficiency of the intelligent cleaning equipment.
  • the human-computer interaction system is used for the user to make a function selection and / or show the user the current state or function selection item of the machine.
  • the energy system is used to provide electrical energy for the functional components of each system.
  • the cleaning system is the most important core system of intelligent cleaning equipment and is used to realize the cleaning function. It includes a dry cleaning part and a wet cleaning part. Among them, the dry cleaning part is mainly used for cleaning fixed particle contaminants on the surface to be cleaned, and the wet cleaning part is mainly used for wiping the surface to be cleaned (such as the ground).
  • the dry cleaning part mainly includes a cleaning brush, a dust box, and a fan.
  • the cleaning brush may include a main brush 14 and an edge brush 15.
  • the main brush 14 has a rotation axis substantially parallel to the plane where the chassis 12 is located and protrudes outward from the chassis 12. Thereby, the main brush 14 forms a certain interference with the surface to be cleaned under the chassis 12.
  • the side brush 15 is disposed at the bottom edge of the device body 1, and its rotation axis is at an angle with respect to the ground for moving garbage into the cleaning area of the main brush 14.
  • the fan is connected with the dust box, and the fan is used to generate the wind force required for vacuuming.
  • the wet cleaning section mainly includes a liquid storage tank and a cleaning cloth.
  • the storage tank contains cleaning fluid, and the cleaning cloth is detachably disposed on the storage tank. After the cleaning of the dry cleaning section is completed, the liquid in the liquid storage tank of the wet cleaning cloth flows to the cleaning cloth, and the cleaning cloth wipes the ground cleaned by the cleaning device.
  • a gear box 20 as shown in FIG. 3 is provided inside the device main body 1 of the smart cleaning device.
  • the gear box 20 is respectively connected to the driving motor of the driving system and the cleaning brush of the dry cleaning part in the cleaning system, and is used to transmit the driving force of the driving motor to the cleaning brush to drive the cleaning brush to rotate around its rotation axis.
  • the gear box 20 includes a first housing 21 and a second housing 22.
  • the first housing 21 and the second housing 22 together constitute an accommodating space for accommodating other components of the gearbox 20, and serve as a base frame for installing these components.
  • the transmission function of the gear box 20 is realized by the input gear and the output gear 23.
  • the input gear is connected to the drive motor of the drive system, and the output gear 23 is connected to the rotating shaft of the cleaning brush of the main brush 14, for example.
  • the gear transmission between the input gear and the output gear is achieved by the meshing of the gear teeth, so that the driving force is transmitted to the main brush 14 at an appropriate speed.
  • the input gear and its matching components are omitted in FIG. 3.
  • the output gear 23 will be described below.
  • the output gear 23 includes a gear body 231.
  • the gear main body 231 is generally formed in a flat cylindrical shape, and a plurality of teeth for meshing are provided on the side surface thereof at intervals in the circumferential direction.
  • one end of the gear body 231 in the axial direction is provided with an engaging portion 232 protruding outward.
  • the engaging portion 232 protrudes outward from the surface of the first housing 21 or the second housing 22 so as to be engaged with the rotating shaft of the main brush 14.
  • the gear body 231 is recessed inward on the side opposite to the engaging portion 232 in the axial direction, and a hole 234 is formed at the center.
  • the gearbox 20 also includes a shaft 24.
  • the shaft 24 is fixedly disposed in the gear box 20, and the output gear 23 is sleeved on the shaft 24 through the hole 234 and can rotate around the shaft 24.
  • the shaft 24 defines the axis of rotation of the output gear 23.
  • the hole 234 is closed at the end close to the engaging portion 232.
  • the output gear 23 is supported by the oil-containing bearing in the gear box 20.
  • the oil-containing bearing includes a first oil-containing bearing 25 and a second oil-containing bearing 26 provided on both sides of the output gear 23 in the axial direction, respectively.
  • the first oil-containing bearing 25 is located at the end of the output gear 23 where the engaging portion 232 is provided.
  • the engaging portion 232 protrudes outward through the first oil-containing bearing 25.
  • the second oil-containing bearing 26 is located at the end of the output gear 23 that is opposed to the engaging portion 232 in the axial direction, and is accommodated in a recess at the end. Both the first oil-containing bearing 25 and the second oil-containing bearing 26 are provided coaxially with the output gear 23.
  • the first oil-containing bearing 25 and the second oil-containing bearing 26 have substantially the same structure, and the difference is that they have different sizes. Therefore, only the first oil-containing bearing 25 will be described here. It can be understood that the structural features of the first oil-containing bearing 25 are also applicable to the second oil-containing bearing 26.
  • the first oil-containing bearing 25 is configured in a circular ring shape, and at least one protrusion 253 radially outward is provided on the side surface.
  • the first oil-containing bearing 25 is fixed by the protrusion 253 engaging with the snap groove on the first housing 21 or the second housing 22.
  • the first oil-containing bearing 25 has a support surface 251 that supports the rotation of the output gear 23. Accordingly, as shown in FIGS. 4 and 5, the output gear 23 has a contact surface 233 that contacts the support surface 251.
  • the surface of the output gear 23 in contact with the first oil-containing bearing 25 may be referred to as a contact surface 233a
  • the surface in contact with the second oil-containing bearing may be referred to as a contact surface 233b.
  • a concave portion 252 is provided on the support surface 251 of the first oil-containing bearing 25.
  • the contact surface 233a does not contact the first oil-containing bearing 25 at a position corresponding to the recessed portion 252. This can reduce the area where the support surface 251 and the contact surface 233a contact, that is, the area where friction occurs, thereby effectively reducing the noise generated by friction and reducing the temperature rise.
  • a plurality of depressions 252 may be provided to further reduce the contact area.
  • the multiple recesses 252 should be evenly distributed around the rotation axis to ensure a stable support effect and avoid deflection during rotation.
  • the output gear 23 can also be made of plastic material, which can further reduce the noise and temperature rise caused by friction.
  • the recessed portion 252 is provided on the support surface 251 of the first oil-containing bearing 25. It can be understood that in other embodiments, the concave portion 252 may also be provided on the contact surface 233a of the output gear 23, or the concave portion 252 may also be provided on both the contact surface 233a and the support surface 251.
  • the four recessed portions 252 divide the support surface 251 of the first oil-containing bearing 25 into discrete four parts. Therefore, if a recessed portion is also provided on the contact surface 233a, the area of the recessed portion on the contact surface 233a corresponding to the support surface 251 (that is, the recessed portion that can be aligned with the support surface 251 during rotation) is less than each portion
  • the area of the support surface 251, or the projection of each support surface 251 and the recessed portion on a plane perpendicular to the axis of rotation does not overlap, so as to avoid being trapped in the recessed portion when the support surface 251 is rotated to the position aligned with the recessed portion Unstable support.
  • the recessed portion 252 on the contact surface 233a and the support surface 251 may be set as shown in FIG. 6, that is, the contact surface 233a or the support surface is still a continuous surface after the recessed portion 252 is provided, instead of being The depression is divided into several independent parts.
  • a recessed portion is provided on at least one of the contact surface and the support surface that are in contact with each other and relatively moved, thereby reducing the surface area where the contact surface and the support surface contact each other, thereby effectively The noise and temperature rise caused by the relative rotation of the rotatable member and the oil bearing are reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • General Details Of Gearings (AREA)

Abstract

一种齿轮箱(20)和智能清洁设备。齿轮箱(20)用于智能清洁设备，其包括可转动件和含油轴承(25、26)，可转动件能够绕转动轴线转动以传递动力，并且具有接触表面(233a)，含油轴承(25、26)固定设置并具有支撑表面（251），含油轴承(25、26)通过支撑表面（251）与可转动件的接触表面(233a)接触以支撑可转动件相对于含油轴承(25、26)转动，其中，接触表面(233a)和支撑表面（251）中的至少一个上设置有凹陷部(252)。齿轮箱(20)，在相互接触并相对运动的接触表面(233a)和支撑表面（251）中的至少一个上设置有凹陷部(252)，由此可以减小接触表面(233a)和支撑表面（251）相互接触的表面积，从而有效地减小可转动件和含油轴承(25、26)相对转动所产生的噪音和温升。

Description

齿轮箱和智能清洁设备
相关申请的交叉引用
本申请要求于2018年10月18日提交的申请号为CN 201821694664.2的中国申请的优先权，其在此出于所有目的通过引用将其全部内容并入本文。
技术领域
本申请涉及清洁工具领域，具体地涉及一种齿轮箱和智能清洁设备。
背景技术
通常情况下，移动式智能清洁设备，大多装配有齿轮箱以将驱动设备的动力通过变速之后传递给清扫装置，使清扫装置能够在合适的转速下执行清扫功能。在有些齿轮箱中，采用含油轴承来支撑诸如输出齿轮的转动部件以减轻磨损。然而，通常转动部件的转速较高，有些能够达到22.5转/秒。高速旋转导致转动部件和含油轴承之间相接触的表面产生较大的噪音和较高的温升，既影响用户的使用体验，也导致齿轮箱内部件的使用寿命降低。
发明内容
在发明内容部分中引入了一系列简化形式的概念，这将在具体实施方式部分中进一步详细说明。本申请的内容部分并不意味着要试图限定出所要求保护的技术方案的关键特征和必要技术特征，更不意味着试图确定所要求保护的技术方案的保护范围。
为至少部分地解决上述问题，本申请实施例提供一种齿轮箱，用于智能清洁设备，所述齿轮箱包括：
可转动件，所述可转动件能够绕转动轴线转动以传递动力，所述可转动件具有接触表面；以及
含油轴承，所述含油轴承固定设置并具有支撑表面，所述含油轴承通 过所述支撑表面与所述可转动件的接触表面接触以支撑所述可转动件相对于所述含油轴承转动；
其中，所述接触表面和所述支撑表面中的至少一个上设置有凹陷部。
根据本申请实施例所提供的齿轮箱，在相互接触并相对运动的接触表面和支撑表面中的至少一个上设置有凹陷部，由此可以减小接触表面和支撑表面相互接触的表面积，从而有效地减小可转动件和含油轴承相对转动所产生的噪音和温升。
可选地，所述凹陷部设置于所述支撑表面上。
可选地，所述凹陷部设置于所述接触表面上。
可选地，所述接触表面和所述支撑表面上均设置有所述凹陷部。
可选地，所述凹陷部包括多个并且绕所述转动轴线均匀分布。
可选地，所述可转动件为输出齿轮，所述含油轴承在所述输出齿轮的沿所述转动轴线的端部支撑所述输出齿轮。
可选地，所述输出齿轮为塑胶材质。
可选地，所述输出齿轮的沿所述转动轴线相对的两侧各设置有一个所述含油轴承。
可选地，所述凹陷部包括多个并且绕所述转动轴线均匀分布。
根据本申请实施例所提供的另一个方面，还提供一种智能清洁设备，所述智能清洁设备包括如前所述的任一种齿轮箱，所述齿轮箱分别与所述智能清洁设备的驱动装置和清扫刷连接，以将所述驱动装置的驱动力传递至所述清扫刷。
根据本申请实施例所提供的智能清洁设备，其齿轮箱在相互接触并相对运动的接触表面和支撑表面中的至少一个上设置有凹陷部，由此可以减小接触表面和支撑表面相互接触的表面积，从而有效地减小可转动件和含油轴承相对转动所产生的噪音和温升。
附图说明
本申请实施方式的下列附图在此作为本申请的一部分用于理解本申请。附图中示出了本申请的实施方式及其描述，用来解释本申请的原理。在附图中，
图1为根据本申请的一个实施方式的智能清洁设备的立体视图；
图2为图1所示的智能清洁设备的另一个角度的立体视图；
图3为根据本申请的一个实施方式的齿轮箱的分解视图；
图4和图5为图3所示的齿轮箱的输出齿轮的立体视图；以及
图6为在支撑表面和/或接触表面上设置凹陷部的示意图。
具体实施方式
在下文的描述中，给出了大量具体的细节以便提供对本申请更为彻底的理解。然而，对于本领域技术人员来说显而易见的是，本申请实施方式可以无需一个或多个这些细节而得以实施。在其他的例子中，为了避免与本申请实施方式发生混淆，对于本领域公知的一些技术特征未进行描述。
为了彻底了解本申请实施方式，将在下列的描述中提出详细的结构。显然，本申请实施方式的施行并不限定于本领域的技术人员所熟习的特殊细节。
以下参照附图对根据本申请实施例所提供的齿轮箱和智能清洁设备进行说明。可以理解，本申请实施例所示的智能清洁设备可以为扫地机器人、拖地机器人、扫拖一体的机器人等，在本实施方式中，智能清洁设备为扫拖一体的清洁机器人。
智能清洁设备主要包括清洁系统、感知系统、控制系统、驱动系统、能源系统和人机交互系统等。各个系统相互协调配合，使智能清洁设备能够自主移动以实现清洁功能。图1和图2示例性地示出了根据本申请实施例所提供的智能清洁设备的立体视图。从外部观察，智能清洁设备主要包括设备主体1。智能清洁设备中构成上述各系统的功能元件等集成地设置在设备主体1内。
如图1和图2所示，设备主体1具有近似圆形的形状(前后都为圆形)，其包括上封盖11、底盘12以及设置在上封盖11和底盘12之间的中框13。中框13作为设置各种功能元件的基础框架。上封盖11和底盘12分别覆盖中框13的上下表面，起到保护内部零部件的作用，并且提升智能清洁设备的美观性。当然，在其他实施方式中，设备主体也可具有其他形状，包括但不限于前方后圆的近似D形形状等。
驱动系统用于为智能清洁系统的自主移动以及清洁系统实现清洁功能提供驱动力。感知系统用于智能清洁设备对例如地形等的外界环境进行感知，并且向控制系统提供机器的各种位置信息和运动状态信息。控制系统 则根据这些信息综合判断智能清洁设备当前处于何种工作状态(例如过门槛，上地毯，位于悬崖处、上方或者下方，被卡住，尘盒满，被拿起等)，并针对不同情况给出具体的下一步动作策略。进一步地，控制系统能基于即时地图信息规划最为高效合理的清扫路径和清扫方式，大大提高智能清洁设备的工作效率。人机交互系统用于供用户进行功能选择并且/或者向用户展示机器当前所处状态或者功能选择项。能源系统则用于各系统的功能性元件工作提供电能。
清洁系统为智能清洁设备最主要的核心系统，用于实现清扫功能，其包括干式清洁部和湿式清洁部。其中，干式清洁部主要用于清扫被清洁表面的固定颗粒污染物，湿式清洁部主要用于对被清洁表面(如地面)进行擦拭。
具体地，干式清洁部主要包括清扫刷、尘盒以及风机。如图2所示，清扫刷可以包括主刷14和边刷15。其中，主刷14具有与底盘12所在的平面大致平行的旋转轴并且从底盘12向外突出。由此，主刷14与底盘12下方的被清洁表面形成一定的干涉。边刷15设置于设备主体1的底部边缘位置，其旋转轴相对于地面成一定角度，以用于将垃圾移动至主刷14的清扫区域中。风机与尘盒连通，风机用于产生吸尘所需的风力。当主刷14随旋转轴转动时，被清洁表面的垃圾由主刷14卷带到其与尘盒之间的吸尘口前方，然后被风机产生的吸力吸入到尘盒内储存。湿式清洁部主要包括储液箱和清洁布。储液箱内容纳有清洁液，清洁布可拆卸地设置在储液箱上。干式清洁部清扫完成以后，湿式清洁布的储液箱内的液体流向清洁布，清洁布对清扫装置清扫后的地面进行擦拭。
智能清洁设备的设备主体1的内部设置有如图3所示的齿轮箱20。该齿轮箱20分别与驱动系统的驱动马达和清洁系统中干式清洁部的清扫刷连接，用于将驱动马达的驱动力传递至清扫刷，以驱动清扫刷绕其旋转轴转动。
如图3所示，齿轮箱20包括第一壳体21和第二壳体22。第一壳体21和第二壳体22共同构成容纳空间以容纳齿轮箱20的其他零部件，并作为安装这些零部件的基础框架。齿轮箱20的传动功能由输入齿轮和输出齿轮23实现。在安装至设备主体1内的状态下，输入齿轮与驱动系统的驱动马达连接，输出齿轮23与例如主刷14的清扫刷的旋转轴连接。输入齿轮和输出齿轮之间通过轮齿的啮合实现齿轮传动，从而将驱动力以合适的转 速传递至主刷14。为简洁起见，图3中省略了输入齿轮以及与之配合的零部件。下面将针对输出齿轮23进行介绍。
如图4和图5所示，输出齿轮23包括齿轮主体231。齿轮主体231大致构造为扁圆柱形，在其侧面沿周向间隔设置有多个用于啮合的齿。在图4中可以看到，齿轮主体231的沿轴向的一端设置有向外突出的接合部232。该接合部232从第一壳体21或第二壳体22的表面向外突出，以便于与主刷14的旋转轴接合。如图5所示，齿轮主体231在沿轴向与接合部232相对的一侧向内凹陷，并且在中心处形成孔234。再返回至图3，齿轮箱20还包括轴24。轴24固定设置在齿轮箱20内，输出齿轮23通过孔234套设在轴24上，并能够绕着轴24转动。轴24限定输出齿轮23的转动轴线。为了避免轴24对接合部232与主刷14的旋转轴的接合产生干涉，孔234在靠近接合部232的一端封闭。
输出齿轮23在齿轮箱20内由含油轴承支撑。具体地，含油轴承包括分别设置于输出齿轮23的沿轴向的两侧的第一含油轴承25和第二含油轴承26。如图3所示，第一含油轴承25位于输出齿轮23的设置有接合部232的一端。其中，接合部232穿过第一含油轴承25向外突出。第二含油轴承26位于输出齿轮23的沿轴向与接合部232相对的一端，并且容纳与该端部的凹陷内。第一含油轴承25和第二含油轴承26均与输出齿轮23同轴地设置。
第一含油轴承25和第二含油轴承26具有大致相同的结构，区别在于二者的尺寸不同。因此此处仅对第一含油轴承25进行介绍。可以理解，第一含油轴承25的结构特征也同样适用于第二含油轴承26。
第一含油轴承25构造为圆环形，并且在侧表面设置有至少一个沿径向向外的突出部253。第一含油轴承25通过突出部253与第一壳体21或第二壳体22上的卡槽配合而被固定。第一含油轴承25具有支撑输出齿轮23转动的支撑表面251。相应地，如图4和图5所示，输出齿轮23具有与支撑表面251接触的接触表面233。在本实施方式中，输出齿轮23与第一含油轴承25接触的表面可以称为接触表面233a，与第二含油轴承接触的表面可以称为接触表面233b。
在现有的此类齿轮箱中，含油轴承与输出齿轮在相对转动的过程中容易产生较大的噪音和较高的温升。为解决这一问题，如图3所示，根据本 申请实施例，第一含油轴承25的支撑表面251上设置有凹陷部252。由此，当第一含油轴承25支撑输出齿轮23时，接触表面233a在与凹陷部252对应的位置处不与第一含油轴承25接触。这样可以减小支撑表面251和接触表面233a相接触的面积，也即减小产生摩擦的面积，从而有效地减小摩擦产生的噪音并降低温升。
凹陷部252可以设置多个以进一步地减小接触面积。然而需要注意的是，多个凹陷部252应该绕转动轴线均匀分布，以保证稳定的支撑效果，避免在转动过程中产生偏摆。此外，还可以选用塑胶材料制作输出齿轮23，由此可以进一步地降低摩擦产生的噪音和温升。
在图示的实施方式中，凹陷部252设置在第一含油轴承25的支撑表面251上。可以理解，在其他的实施方式中，也可以将凹陷部252设置在输出齿轮23的接触表面233a上，或者还可以在接触表面233a和支撑表面251上均设置凹陷部252。
需要注意的是，在图示的实施方式中，四个凹陷部252将第一含油轴承25的支撑表面251分割成不连续的四份。因此，如果在接触表面233a上也设置凹陷部，应该使接触表面233a上与支撑表面251对应的凹陷部(也即在转动过程中能够与支撑表面251对齐的凹陷部)的面积小于每一份的支撑表面251的面积，或者使每一份支撑表面251与凹陷部在垂直于转动轴线的平面上的投影不重叠，以避免当支撑表面251转动至与凹陷部对齐的位置时陷入凹陷部内导致不稳定支撑。或者还可以将接触表面233a和支撑表面251上的凹陷部252均设置为如图6所示的形式，也即接触表面233a或支撑表面在设置凹陷部252之后仍旧为连续的表面，而非被凹陷部分割为若干相互独立的部分。
此外，可以理解，上述输出齿轮与含油轴承相互配合的结构也同样适用于齿轮箱的输入齿轮。
以上对根据本申请实施例的齿轮箱和智能清洁设备进行了说明。根据本申请实施例所提供的齿轮箱，在相互接触并相对运动的接触表面和支撑表面中的至少一个上设置有凹陷部，由此可以减小接触表面和支撑表面相互接触的表面积，从而有效地减小可转动件和含油轴承相对转动所产生的噪音和温升。
除非另有定义，本文中所使用的技术和科学术语与本申请所涉及的技 术领域的技术人员通常理解的含义相同。本文中使用的术语只是为了描述具体的实施目的，不是旨在限制本申请。本文中出现的诸如“设置”等术语既可以表示一个部件直接附接至另一个部件，也可以表示一个部件通过中间件附接至另一个部件。本文中在一个实施方式中描述的特征可以单独地或与其它特征结合地应用于另一个实施方式，除非该特征在该另一个实施方式中不适用或是另有说明。
本申请已经通过上述实施方式进行了说明，但应当理解的是，上述实施方式只是用于举例和说明的目的，而非意在将本申请限制于所描述的实施方式范围内。本领域技术人员可以理解的是，根据本申请的教导还可以做出更多种的变型和修改，这些变型和修改均落在本申请所要求保护的范围以内。

Claims (10)

  1. 一种齿轮箱，用于智能清洁设备，其特征在于，所述齿轮箱包括：
    可转动件，所述可转动件能够绕转动轴线转动以传递动力，所述可转动件具有接触表面；以及
    含油轴承，所述含油轴承固定设置并具有支撑表面，所述含油轴承通过所述支撑表面与所述可转动件的接触表面接触以支撑所述可转动件相对于所述含油轴承转动；
    其中，所述接触表面和所述支撑表面中的至少一个上设置有凹陷部。
  2. 根据权利要求1所述的齿轮箱，其特征在于，所述凹陷部设置于所述支撑表面上。
  3. 根据权利要求1所述的齿轮箱，其特征在于，所述凹陷部设置于所述接触表面上。
  4. 根据权利要求1所述的齿轮箱，其特征在于，所述接触表面和所述支撑表面上均设置有所述凹陷部。
  5. 根据权利要求1至4中任意一项所述的齿轮箱，其特征在于，所述凹陷部包括多个并且绕所述转动轴线均匀分布。
  6. 根据权利要求1至4中任意一项所述的齿轮箱，其特征在于，所述可转动件为输出齿轮，所述含油轴承在所述输出齿轮的沿所述转动轴线的端部支撑所述输出齿轮。
  7. 根据权利要求6所述的齿轮箱，其特征在于，所述输出齿轮为塑胶材质。
  8. 根据权利要求6所述的齿轮箱，其特征在于，所述输出齿轮在沿所述转动轴线相对的两侧各设置有一个所述含油轴承。
  9. 根据权利要求6所述的齿轮箱，其特征在于，所述凹陷部包括多个并且绕所述转动轴线均匀分布。
  10. 一种智能清洁设备，其特征在于，所述智能清洁设备包括根据权利要求1至9中任意一项所述的齿轮箱，所述齿轮箱分别与所述智能清洁设备的驱动装置和清扫刷连接，以将所述驱动装置的驱动力传递至所述清扫刷。
PCT/CN2019/111765 2018-10-18 2019-10-17 齿轮箱和智能清洁设备 WO2020078441A1 (zh)

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