CN218243252U - Electric motor, and transmission and rolling device including the same - Google Patents

Electric motor, and transmission and rolling device including the same Download PDF

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Publication number
CN218243252U
CN218243252U CN202220993633.7U CN202220993633U CN218243252U CN 218243252 U CN218243252 U CN 218243252U CN 202220993633 U CN202220993633 U CN 202220993633U CN 218243252 U CN218243252 U CN 218243252U
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China
Prior art keywords
rotary shaft
ball bearing
electric motor
rotor
outer ring
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CN202220993633.7U
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Chinese (zh)
Inventor
皮埃尔·布吕-阿勒罗
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French Redict
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French Redict
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3825—Ball cages formed as a flexible belt, e.g. spacers connected by a thin film
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7863—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
    • 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
    • F16C2310/00—Agricultural machines
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • F16C2380/27—Motor coupled with a gear, e.g. worm gears
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing

Abstract

Electric motor (1) comprising a stator (2), a rotor (3), a rotary shaft (4) driven by the rotor (3), a fan (5) rotationally fixedly coupled to the rotary shaft (4), a ball bearing (6) mounted on the rotary shaft (4) and a through-hole housing (7), the rotor (3), the stator (2), the rotary shaft (4), the fan (5) and the ball bearing (6) being at least partially arranged within the through-hole housing, the ball bearing (6) comprising an outer ring (9) which is rotationally fixedly mounted within the housing (7) and which is coaxial with respect to an inner ring (10) which is rotationally fixedly mounted to the rotary shaft (4). The electric motor (1) comprises a deflector disc (14) mounted on a rotating shaft (4) between the rotor (3) and the ball bearing (6), spaced apart from the outer ring (9) of the bearing (6), fixedly joined in a rotating manner to the rotating shaft (4), having an outer diameter at least equal to the inner diameter of the outer ring (9) of the bearing (6).

Description

Electric motor, and transmission and rolling device including the same
Technical Field
The present invention relates to an electric motor and a transmission and a rolling device comprising such an electric motor.
Background
The present invention relates in particular to an electric motor comprising a stator and a rotor mounted coaxially with respect to each other, a rotation shaft driven by the rotor, a fan coaxial with and fixedly joined in a rotating manner to the rotation shaft, at least one ball bearing mounted on the rotation shaft and a through-hole housing, the rotor, the stator, the fan and the ball bearing being arranged in the through-hole housing, the ball bearing comprising an outer ring and an inner ring which are coaxial and two flanges which together define a chamber containing a lubricant and balls housing the bearing, the inner ring of the bearing being mounted so as to be fixedly joined in a rotating manner to the rotation shaft, the outer ring of the bearing being mounted so as to be fixed in the housing.
Such motors are well known to those skilled in the art. Such a motor may be operated with a reduced risk of overheating due to the presence of the fan. The fan is capable of generating an air flow circulating inside the through-hole enclosure, that is, the through-hole enclosure is provided with an air circulation opening. This arrangement can improve operation and reduce maintenance. However, such motors may operate in dusty environments. There is therefore a risk that dust in the environment is introduced inside the housing of the device. Therefore, the present invention seeks to provide a solution that can prevent a malfunction that may occur after dust is introduced inside the motor, without impairing the compactness, simplicity or ease of maintenance of the motor.
Disclosure of Invention
The object of the present invention is to provide an electric motor designed to limit the risk of failure, in particular during movement of the motor in dusty environments.
To this end, the invention relates to an electric motor comprising a stator and a rotor mounted coaxially with each other, a rotation shaft driven by the rotor, a fan coaxially and rotationally fixedly coupled to the rotation shaft with respect to the rotation shaft, at least one ball bearing mounted on the rotation shaft and a through-hole housing, the rotor, the stator, the rotation shaft, the fan and the ball bearing being arranged at least partially within the through-hole housing, the ball bearing comprising an outer ring and an inner ring which are coaxial and which together delimit a chamber containing a lubricant and housing the balls of the bearing, and two flanges, the inner ring being rotationally fixedly mounted to the rotation shaft, the outer ring of the ball bearing being rotationally fixedly mounted within the housing, wherein the electric motor comprises a deflector disc mounted on the rotation shaft between the rotor and the ball bearing and at least one spacer washer mounted between the ball bearing and the deflector disc to keep at least the outer ring of the ball bearing spaced apart from the deflector disc, the deflector disc being rotationally fixedly connected to the rotation shaft, the rotation shaft having at least an outer diameter equal to the inner diameter of the outer ring of the bearing, the outer ring being measured closest to the inner diameter of the deflector disc of the ball bearing.
Sizing the deflector plate according to the outer ring size of the bearing limits the risk of premature failure of the ball bearing.
Since the motor comprises a spacer washer which is accommodated between the ball bearing and the deflector disc to keep at least the outer ring of the bearing spaced apart from the deflector disc, premature damage of the outer ring of the bearing due to friction with the deflector disc is prevented.
According to an embodiment of the invention, the fan comprises a plurality of so-called radial air mixing blades mounted in a divergent arrangement on a common support fixedly joined in a rotating manner to said rotating shaft.
According to an embodiment of the invention, the rotor is arranged between the fan and the ball bearing. Due to this design the deflection function of the deflection disc is optimized.
The invention also relates to a transmission device comprising at least one electric motor and a drive device, the electric motor comprising a stator and a rotor mounted coaxially with respect to each other, a rotary shaft driven by the rotor, a fan coaxial with the rotary shaft, the fan being fixedly engaged in rotation with the rotary shaft, at least one ball bearing mounted on the rotary shaft and a through-hole housing, the rotor, the stator, the rotary shaft, the fan and the ball bearing being arranged at least partially inside the through-hole housing, the ball bearing comprising an outer ring and an inner ring which are coaxial and two flanges, the outer ring and the inner ring and the two flanges together defining a chamber containing a lubricant and containing balls of the bearing, the inner ring of the ball bearing being mounted so as to be fixedly engaged in rotation to the rotary shaft, the outer ring of the bearing being mounted so as to be fixed inside the housing, wherein the electric motor is an electric motor as described above, wherein the drive device is a drive device enabling the rotary shaft of the electric motor to be engaged with the drive device so as to transmit the rotary motion of the rotary shaft to the drive device, and at least a part of the electric motor and the drive device being at least partially contained inside the housing forming the housing.
The invention also relates to a rolling device, such as a lawn mower, comprising at least one electric motor, wherein said electric motor is an electric motor as described above.
Drawings
The invention will be clearly understood from a reading of the following description of an embodiment, taken in conjunction with the accompanying drawings, in which:
figure 1 shows a perspective view of a rolling device, in particular a grass mower, provided with an electric motor according to the present invention,
figure 2 shows a partial cross-sectional view of the motor contained within the transmission housing,
figure 3 shows a detailed view of the bearing of figure 2,
figure 4 shows a partial view of the device in an exploded position of the rotating or turning element of the motor,
figure 5 shows a partial perspective view of the transmission in a state in which the housing of the transmission is at least partially open,
fig. 6 shows a partial perspective view of the transmission.
Detailed Description
As described above, the present invention relates to a motor 1, and applications of the motor 1 may be diversified and varied.
The figures show an example of an electric motor 1 for rotatably driving the wheels of a rolling device 23, in this example in the form of a mower, but the electric motor 1 can be used for any other type of rolling device without departing from the scope of the invention.
The electric motor 1 comprises, in a manner known per se, a stator 2 and a rotor 3 which are coaxial, i.e. the stator 2 and the rotor 3 are mounted coaxially with respect to each other. As described above, the rotor 3 is a rotor that rotates around a rotation axis, and the stator 2 is disposed around the rotor 3 so as to extend coaxially with respect to the rotation axis of the rotor 3.
Since the rotor 3 and the stator 2 are commercially available rotors and stators, the rotor 3 and the stator 2 will not be described in detail below.
In the example shown, the rotor 3 comprises a stack of metal sheets through which the rotational axis 4 extends. This is because the motor 1 further comprises a rotary shaft 4 driven by the rotor 3, which rotary shaft is fixedly mounted for rotation on the rotor 3, the axis of rotation of the rotary shaft 4 being aligned with the axis of rotation of the rotor 3.
The motor 1 further comprises a fan 5 coaxial with the rotation shaft 4 of the motor 1, which fan is fixedly connected in a rotating manner to the rotation shaft 4. The fan 5 is carried by the rotating shaft 4 of the motor 1.
In the example shown, the fan 5 comprises a plurality of so-called radial air mixing blades 16, the air mixing blades 16 being mounted in a divergent arrangement on a common support 17, the common support 17 being fixedly connected in rotation to the rotary shaft 4. The common support 17 may be in the form of a plate which is centrally recessed so that the rotating shaft 4 carrying the fan may extend through the plate. A rotationally fixed mounting may be obtained by complementary shapes (e.g. grooves and channels) or by adhesive engagement.
The motor 1 further comprises a ball bearing 6 and a through-hole housing 7, the rotor 3, the stator 2, the rotary shaft 4, the fan 5 and the ball bearing 6 being at least partially arranged within the through-hole housing.
The opening 8 of the housing 7 is formed by a through hole provided in the housing 7, which housing 7 is typically a rigid housing. The housing 7 may be made of metal, composite materials, or the like. The housing 7 may be substantially cylindrical.
In the example shown, the housing 7 is provided with two opposite through holes provided in two oppositely arranged walls of the housing, so that the rotary shaft 4 can protrude from the housing 7 at each end. In this case, the through-opening is provided in a partially closed end face of the cylinder.
In the example shown, the other elements, i.e. the rotor 3, the stator 2, the fan 5 and the ball bearings 6, are completely accommodated within the housing 7.
The rotor 3 is located inside the housing 7 between the ball bearings 6 and the fan 5, so that an air flow generated by the fan can circulate along the rotor in the direction of the ball bearings 6 to cool the rotor.
The ball bearing 6 mounted on the rotating shaft 4 comprises coaxial outer and inner rings 9, 10 and two flanges 11, the outer and inner rings 9, 10 together defining a bearing-receiving ball 13 chamber 12 with the two flanges. The chamber 12 contains a lubricant such as grease.
The inner ring 10 is mounted to be fixedly joined to the rotary shaft 4 in a rotary manner, and the outer ring 9 of the bearing 6 is mounted to be fixed within the housing 7.
Such a rotationally fixed mounting of the outer ring 9 of the bearing 6 inside the housing 7 is obtained by the abutting contact of the outer ring 9 with the housing 7.
In order to prevent an excessively rapid damage of the ball bearing 6 in contact with the air flow which may contain dust particles, the electric motor 1 comprises a deflector disc 14 mounted on the axis of rotation between the rotor 3 and the ball bearing 6, so that the electric motor 1 comprises at least the rotor 3 and the deflector disc 14 in the direction from the fan 5 towards the ball bearing 6.
The deflector disc 14 is at least arranged spaced from the outer ring 9 of the ball bearing 6, typically with a gap separating the deflector disc 14 from the outer ring 9 of between 0.1mm and 2 mm.
The deflector disc 14, which is fixedly joined in a rotating manner to the rotating shaft 4, has an outer diameter which is at least equal to the inner diameter Di of the outer ring 9 of the bearing 6. The inner diameter Di of the outer ring 9 of the bearing 6 is measured at the flange 11 of the ball bearing 6 closest to the deflector disc 14.
The details of this size ratio between the deflector disc and the outer ring of the bearing are shown in figure 3.
For mounting on the rotation shaft 4, the deflection disc 14 is centrally recessed.
Between the ball bearing 6 and the deflector disc 14 a spacer washer 15 is accommodated through which the rotary shaft 4 extends, which washer is supported by the rotary shaft 4. The spacer washer 15 enables the deflector disc 14 to be kept spaced at least from the outer ring 9 of the bearing 6.
In the example shown, the rotating shaft 4 carries a pinion of a drive means 21, which may take various forms. Regardless of the embodiment of the drive means 21, the rotary motion of the rotary shaft 4 is transmitted to the drive means 21.
In this case, the drive means 21 are able to drive in rotation at least some of the wheels of the mower. In a state where the drive means 21 is arranged between the rotary shaft 4 of the motor 1 and the drive shaft of the device wheel, the drive means 21 may comprise at least one gear mechanism, a clutch mechanism, a gear, an output shaft 23 forming the drive shaft of the wheel of the rolling device, which output shaft 23 is in mesh with the gear.
The detailed design of such a drive device is described, for example, in patent FR3036450, but constitutes only one embodiment per se.
At least a portion of such a drive and motor may be housed within a housing 22. Thus, as shown in fig. 5 and 6, the housing 22 forms the housing of the transmission 20.
Due to the presence of the deflector disc 14, when the rotor rotates and rotatably drives the fan 5, the air flow generated by this fan is deflected by the deflector disc 14, this deflection preventing this air flow from reaching the bearing 6 directly, so that the bearing 6 can be at least partially protected when this air flow is loaded with dust.

Claims (5)

1. An electric motor (1) comprising a stator (2) and a rotor (3) mounted coaxially with respect to each other, a rotary shaft (4) driven by the rotor (3), a fan (5) coupled coaxially with respect to the rotary shaft (4) and fixedly in rotation to the rotary shaft (4), at least one ball bearing (6) mounted on the rotary shaft (4) and a perforated housing (7), the rotor (3), the stator (2), the rotary shaft (4), the fan (5) and the ball bearing (6) being arranged at least partially within the perforated housing, the ball bearing (6) comprising an outer ring (9) and an inner ring (10) which are coaxial and two flanges (11), the outer ring (9), the inner ring (10) and the two flanges jointly delimiting a cavity (12) which is filled with a lubricant and which accommodates balls (13) of the bearing (6), the inner ring (10) being fixedly mounted in rotation to the rotary shaft (4), the outer ring (9) of the ball bearing (6) being fixedly mounted in rotation within the housing (7), wherein the electric motor (1) comprises a deflector disc (14) and at least one deflector disc (14), the rotor (3) and the deflector disc (14) comprising at least one deflector disc (14) (6) Between the ball bearing (6) and the deflector disc (14) to keep at least the outer ring (9) of the ball bearing (6) spaced apart from the deflector disc (14), which is fixedly joined in a rotating manner to the rotating shaft (4), the rotating shaft (4) having an outer diameter at least equal to the inner diameter (Di) of the outer ring (9) of the bearing (6), the inner diameter (Di) of the outer ring (9) of the bearing (6) being measured at the flange (11) of the ball bearing (6) closest to the deflector disc (14).
2. Electric motor (1) according to claim 1, wherein said fan (5) comprises a plurality of so-called radial air mixing blades (16) mounted in a divergent arrangement on a common support (17) fixedly joined in a rotating manner to said rotary shaft (4).
3. The electric motor (1) according to claim 1 or 2, wherein the rotor (3) is arranged between the fan (5) and the ball bearing (6).
4. A transmission device (20) comprising at least one electric motor (1) and a drive device (21), the electric motor (1) comprising a stator (2) and a rotor (3) mounted coaxially with respect to each other, a rotary shaft (4) driven by the rotor (3), a fan (5) which is coaxial with respect to the rotary shaft (4) and is fixedly engaged in a rotary manner to the rotary shaft (4), at least one ball bearing (6) mounted on the rotary shaft (4), and a through-hole housing (7) in which the rotor (3), the stator (2), the rotary shaft (4), the fan (5) and the ball bearing (6) are arranged at least partially, the ball bearing (6) comprising an outer ring (9) and an inner ring (10) which are coaxial and two flanges (11) which together define a chamber (12) which is filled with lubricant and which accommodates balls (13) of the bearing (6), the inner ring (10) being mounted so as to be fixedly engaged in a rotary manner to the rotary shaft (4), the ball bearing (7) being mounted in which the outer ring (9) is fixed, wherein the ball bearing (6) is mounted in the through-hole housing (7), the electric motor (1) is according to any one of claims 1 to 3, the drive means (21) is drive means enabling the rotary shaft (4) of the electric motor (1) to engage with the drive means in order to transmit the rotary motion of the rotary shaft (4) to the drive means (21), and at least a portion of the electric motor (1) and the drive means (21) is at least partially housed within a housing (22) forming the transmission means (20).
5. Rolling device (23) of a lawn mower comprising at least one electric motor (1), wherein the electric motor (1) is an electric motor according to any one of claims 1 to 3.
CN202220993633.7U 2021-04-27 2022-04-27 Electric motor, and transmission and rolling device including the same Active CN218243252U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2104356A FR3122294B3 (en) 2021-04-27 2021-04-27 Electric motor, transmission and rolling machine comprising such an electric motor
FR2104356 2021-04-27

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CN218243252U true CN218243252U (en) 2023-01-06

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DE (1) DE202022102245U1 (en)
FR (1) FR3122294B3 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3036450B1 (en) 2015-05-19 2017-05-19 France Reducteurs TRANSMISSION FOR WHEEL DRIVER OF WALKING PREFERENCE AND ROLLER EQUIPPED WITH SUCH TRANSMISSION

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FR3122294A3 (en) 2022-10-28
DE202022102245U1 (en) 2022-08-04
FR3122294B3 (en) 2023-08-25

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