An outer wall a of bearing retainer retains the bearing and simultaneously retains the brushes and in the position shown. The bearing retainer and wall surface a may further comprise a plurality of projections FIGS.

The projections cooperate with an inner wall surface a FIG. After the retainer is moved from the open position shown in FIG. This permits the retainer to move freely in the direction of arrow B in FIG.

The outer diameter defined by wall a FIG. As mentioned earlier herein, the embodiment illustrated functions to retain the brushes and in the open position illustrated in FIG.

The retainer functions in a manner similar to the adjustment member 34 described earlier herein relative to the embodiment shown in FIGS.

As mentioned earlier, the surface a of retainer is dimensioned to be slidably, but snugly, received within the inside wall a FIG. When an end a FIG.

This provides clearance FIG. Thus, if zero endplay is desired, then the retainer would be forced in the opposite direction of arrow C FIG. After the retainer is moved to the desired position within the hub , the hub is secured to the retainer in a manner similar to that described earlier herein relative to the first embodiment.

For example and as illustrated in FIG. This causes the retainer to be secured and affixed to the hub Note that a through-transmission laser welding process may also be used of the type shown and described earlier herein relative to the embodiment shown in FIG.

It should be understood that through-transmission laser welding is a process where the laser beam passes through the outside material dispersing very little energy, but upon hitting the inner surface which is purposely made absorbent, dissipates heat, causing a melt zone which fuses the two pieces of plastic together.

It should also be appreciated that the hub could also comprise a plurality of slotted fingers, similar to the projections or fingers 21 FIG. Advantageously, this system and method provide a bearing retainer that is capable of retaining brushes, such as brushes and , in an open position of the type illustrated in FIGS.

This may be beneficial during shipping or even manufacturing of the motor The retainer FIG. The retainer has yet another feature in that it retains the bearing in a retained position during assembly and use.

Thus, the retainer comprises and defines an assembly and approach for accomplishing multiple functions with a minimal amount of parts. While the system and method described, constitute preferred embodiments of this invention, it is to be understood that the invention is not limited to this precise system and method, and that changes may be made in either without departing from the scope of the inventions, which is defined in the appended claims.

All rights reserved. A SumoBrain Solutions Company. Login Sign up. Search Expert Search Quick Search. Electric motor and method for reducing end play.

United States Patent An electric motor and method for reducing or eliminating end play. The motor comprises an adjustment member that cooperates with an end lamina member to facilitate reducing end play.

The adjustment member is slidably mounted on an armature shaft and inside an aperture of a portion of the end lamina tube to reduce or eliminate end play. Thereafter, the adjustment member is permanently secured to the end lamina tube.

In another illustrative embodiment, the movable bearing retainer sets endplay and also retains brushes in an open position prior to, for example, assembly of the motor.

Click for automatic bibliography generation. Valeo Electrical Systems, Inc. The method as recited in claim 1 wherein said end lamina member is dimensioned to permit said end lamina member to slide on an outer diameter of said adjustment member while staying in substantially the same position on said armature shaft.

The method as recited in claim 1 wherein said adjustment member slides onto said armature with less force than is required to slide said adjustment member into said end lamina member.

The method as recited in claim 3 wherein said force required to slide is less than one pound. The method as recited in claim 1 wherein said method further comprises the step of: providing an end lamina member comprising a plurality of slots to facilitate receiving said adjustment member therein.

The method as recited in claim 1 wherein said method further comprises the step of: providing an end lamina member that comprises no slots. The method as recited in claim 1 wherein said method further comprises the step of: providing an adjustment member having a plurality of fingers to permit gripping the end lamina member.

The method as recited in claim 1 wherein said method further comprises the step of: providing an end lamina member comprising a plurality of fingers to facilitate gripping said adjustment member.

The method as recited in claim 1 wherein said adjustment member is a polymer and is welded onto said end lamina member. The method as recited in claim 9 wherein said adjustment member is laser welded onto said end lamina member.

The method as recited in claim 1 wherein said end lamina member is a polymer and is affixed to said adjustment member with an adhesive. The method as recited in claim 1 wherein said end lamina member and said adjustment member are both polymers.

The method as recited in claim 1 wherein said end lamina member and said adjustment member are both metallic. The adjustment member as recited in claim 1 wherein one of said second member or said adjustment member is metallic and the other is a polymer.

The method as recited in claim 1 wherein said end play distance is less than 0. The method as recited in claim 4 wherein said end play distance is less than 0.

The method as recited in claim 1 wherein said method further comprises the step of: moving said armature a desired amount until an end play distance reaches a desired end play distance before said securing step.

The method as recited in claim 1 wherein said desired end play distance is zero. The method as recited in claim 4, wherein said end play distance is greater than zero but less than 0.

The method as recited in claim 1 wherein said end lamina member and said adjustment member are both cylindrical tubular members. The adjustment member as recited in claim 1 wherein said end lamina member is cylindrical.

The adjustment member as recited in claim 1 wherein said end lamina member comprises multiple sides. The method as recited in claim 1 wherein said end lamina member is slotted. The method as recited in claim 1 wherein said adjustment member is cylindrical.

The method as recited in claim 1 wherein said securing step is accomplished by stacking, magnetic forming or screwing said end lamina member onto said adjustment member.

Field of the Invention This invention relates to electric motors and, more particularly, to an electric motor having an adjustment member situated on an armature shaft and cooperating with another member to reduce or eliminate armature axial end play, thereby reducing noise, heat and undesired vibration.

Description of Related Art A conventional motor shaft is fastened to a driven member, such as a window lift linkage or assembly, a drive gear or the like, a blower wheel or fan or the like, so that rotational motion can be transferred from the shaft to the driven member.

Although not shown, it should be understood that between the brush housing retainers and the brush housings, one or more small cylindrical or other shape rubber elements may be provided to facilitate reducing vibration and noise As shown in FIG.

Next Patent Method of making an Multiple pole, shaded pole subfractional-horsepower induction motor. Electric motor for driving a piston pump and method of assembly.

Combined armature and structurally supportive commutator for electric motors. Electric motor having brush noise absorption system.

Self-adjusting end play eliminator system and method. Blood pump bearing system. Method of fabricating an injected molded motor assembly.

Removal of end play in electric motors. Drive unit, in particular an electromotive window - lift drive for a motor vehicle.

Motor with end play insert. Bearing device for supporting a motor shaft. The bushing 3 in the first embodiment is made of a thermoplastic material such as a combination of nylon and molydenum sulphide, filled polyesters, polycarbonates and acetals which is press fitted onto shaft 2 to rotate with shaft 2.

The material should be of a type which can be ultrasonically welded and provide a good thrust surface. Rotor 1 provides a backup for the plastic bushing 3. As illustrating in FIGS.

In addition the portion 5 is slightly tapered at the outer end as at 8. After assembly of the rotor 1, shaft 2, bushing 3 and thrust collar 4, the rotor shaft assembly is inserted inside of the bore of stator and coil assembly 9 located within main frame 10 with the extension end of shaft 2 protruding through the end frame assembly as illustrated in FIG.

The shaft extension end portion of the motor includes the bearing 11 assembled on shaft 2 which rests against the thrust collar 4 in turn abutting the rotor 1.

It also includes the wick 12 of absorbent material, means 13 to hold the wick 12 in place and the end frame After assembly of the described parts of the electric motor, the thrust collar 15 also of plastic material corresponding to that of bushing 3 is slip fitted onto the end of shaft 2 opposite the extension end.

Thrust collar 15 has the inwardly extending annular projection 16 of a size generally complementary to annular slot 7 of bushing 3 but extends slightly outwardly of slot 7 to initially engage the outer annular portion 6 of bushing 3 and is tapered at the outer end as at 17 complementary to the tapered surface 8 of bushing 3 so that thrust collar 15 can be forced more readily into engagement with the outer end of bushing 3 as at 8.

Thrust collar 15 is joined to bushing 3 by an ultrasonic weld as at 18 as shown in FIG. The ultrasonic horn 19 which is energized by a source of power, not shown, has the annular leg 21 which is positioned over shaft 2 and against the thrust collar 15 to be welded to bushing 3.

Horn 19 when energized forms weld 18 by displacing thrust collar 15 by annular leg 21 with respect to bushing 3 until the outer leg 22 of horn 19 seats against the face 20 of the main frame 10 whereby a pressure or limit switch, not shown, deenergizes horn The bearing 23 is then assembled into end frame 24 with wick 25 of an absorbent material and means 26 to hold wick 25 in such a manner that when bearing 23 is assembled on shaft 2 and surface 27 of end frame 24 is in its final position abutting surface 20 of main frame 10, the inboard face of bearing 23 extends inboard from the face 20 of the main frame 10 a distance of 0.

This clearance is sufficient to permit easy motor starting and is tight enough to limit end bumping noise to acceptable levels. In the second embodiment the bushing 28 is made of sintered metal such as iron which is shrunk onto shaft 2 and is spaced outwardly from rotor 1.

The thrust collar 29, however, is made of a thermoplastic material as described with respect to the first embodiment. In this embodiment bushing 28 has an annular outwardly extending projection 30 which is spaced from shaft 2 to form the annular slot 31 between shaft 2 and annular projection Thrust collar 29 has an annular slot 32 formed generally complementary to annular projection 30 of bushing An ultrasonic horn 33 corresponding to that of the horn 19 of the first embodiment is employed to force thrust collar 29 over projection 30 as the latter is received within annular slot 32 of collar The bushing 28 and thrust collar 29 are thereby welded together by horn 33 and in effect form a single member.

As noted with respect to the first embodiment, this clearance is sufficient to permit easy motor starting but not so great to result in end bumping noise above acceptable levels.

The assembly of the bushing and thrust collar of the invention is substantially the same in both embodiments. Thus, for purpose of illustration, referring to the first embodiment shown in FIGS.

The main frame 10, stator and coil assembly 9 with end frame 14 and other parts which are attached to main frame 10 are placed in an assembly fixture, not shown.

The assembly shown in FIG. Thereafter thrust collar 15 is slip fitted over the upper end of shaft 2 and against bushing 3. The annular leg 21 of horn 19 is then slipped over shaft 2 and engages thrust collar Horn 19 is then energized and forces collar 15 into bushing 3 to join collar 15 and bushing 3 by ultrasonic weld The ultrasonic action stops when the outer leg 22 of horn 19 is fully seated on the face 20 of main frame This positions the thrust collar 15 of the order of 0.

The motor is completed by assembling bearing 23, wick 25 and holding means 26 into end frame 24 and attaching the end frame assembly in place with the bearing 23 located over shaft 2 and the surface 27 of end frame 24 in its final position with respect to abutting surface 20 of main frame 10 as illustrated in FIG.

The clearance between bearing 23 and thrust collar 15 thus limits the end play of rotor 1 within 0. The invention eliminates the use of machining and shims and cushion washers to control end play and deaden undesirable bumping noise.

The use of the ultrasonic horn to engage the end frame and weld the thrust collar to the bushing makes it possible to consistently locate the collar in engagement with the bushing to provide a controlled clearance within close tolerance limits between the sleeve bearing and the thrust collar and bushing.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

electric motor shaft end play

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This invention relates to electric motors and, more particularly, to an electric motor having an adjustment plag situated on electric motor shaft end play ply electric motor shaft end play and shavt with another member to reduce or eliminate armature axial end play, thereby reducing noise, heat and undesired vibration.

A conventional motor shaft is fastened to a driven member, such as a window lift linkage or assembly, a drive gear or the like, a blower wheel or fan or continue reading like, electric motor shaft end play that ene motion can be transferred from the shaft to the driven member.

Due to various factors, such as tolerances in the length of the lamina stack, bearings, motor end caps, end laminas, motor frame, commutator axial position, and shafr like, a gap, or whaft called end play, can result electric motor shaft end play the bearing axial thrust surface s and the axial thrust surface s on the armature.

Too little end play, or android rpg that plays called negative end play, can cause electric motor shaft end play noise, heat, and premature failure.

Automotive manufacturers and motor manufacturers have undertaken efforts to minimize this end play distance. One conventional approach incorporates either hard or resilient click to see more that are positioned between ehd armature and bearing thrust surface s to resist movement of the armature relative to the frame.

Other noise suppression approaches include the use electric motor shaft end play noise absorption materials and barriers within the motors. Still another approach is to assemble a retainer to the external portion electric motor shaft end play the armature shaft, in close proximity to the external face of one of the bearings.

Armature axial travel is limited in one under match play golf by the retainer on the outside of the electric motor shaft end play monkey go games unblocked electric motor shaft end play e,ectric other direction by the internal thrust surface on the armature.

There is a need to provide a further solution for effective suppression of vibration and noise in a electrid approach shagt reducing or eliminating electric motor shaft end play play in an electric motor.

It is, therefore, a primary object of the invention to provide a system and method for electric motor shaft end play or eliminating end play. Another object how to start game the invention is pkay provide electric motor shaft end play system and electric motor shaft end play that facilitates adjusting an end play distance to a predetermined amount, and to permanently affix or lock-in electric motor shaft end play endplay at the desired magnitude.

In one aspect, this invention comprises an adjustment member for mounting on an armature shaft, comprising a electric motor shaft end play member dimensioned to be received on the armature shaft, and to be received in a second member in order to adjust an end play distance.

In another aspect, this invention electric motor shaft end play an electric motor comprising electric motor shaft end play motor electric motor shaft end play for receiving a stator check this out associated with a rotor comprising a lamina stack comprising an electric motor shaft end play tube, the lamina stack mootr in operative continue reading with the eectric, an armature shaft; and an adjustment member dimensioned electric motor shaft end play be received on the armature shaft and be received in an end lamina tube assembly, enf adjustment member being slidable on the armature shhaft in order to adjust an end http://forumz.us/jungle-book-full-movie-in-english-free-download.html distance.

These and other electric motor shaft end play and advantages of electric motor shaft end play invention will be apparent from the following description, the accompanying drawings and fun marketing games for students appended claims.

Referring now to FIGS. The motor 10 comprises a conventional brush jotor and an end cap assembly The motor 10 further comprises shxft armature assembly electric motor shaft end play having a plurality of lamina 16 best shown in Electric motor shaft end play. The shaft 20 is rotatably received in bearings 22 and 24as is also illustrated in FIG.

The motor 10 further comprises a here 26 having magnets 28 that become operatively associated with electric motor shaft end play lamina 16 and plah windings When the armature assembly 14 is situated in the housing 26the magnets shafr become operatively associated with the lamina 16 and windings As is rnd known, when a current is applied through the brush card to a commutator 32 electric motor shaft end play ultimately to windings 30the armature shaft 20 rotates and drives a driven member not shown attached to shaft 20 to perform useful work.

As shown in FIGS. Bus trips to vikings member portion 19as shown in FIGS. The http://forumz.us/prodigy-game-play-com-play.html segments 21 are resilient and can flex or move radially to accommodate an outside diameter of an adjustment member 34 when it is inserted into an opening 35 FIG.

As illustrated in FIGS. The adjustment member 34 is further situated inside the interior wall 19 a FIGS. The amount of force required to slide the adjustment member 34 inside the wall 19 a is less than approximately one pound in the embodiment described.

As best illustrated in FIG. Thereafter, the windings 30 are applied to provide the armature assembly 14 FIGS. As noted earlier and as best illustrated in FIGS. During assembly, the armature assembly 14 is then situated in the housing 26as illustrated in FIG.

As best shown in FIGS. The end cap assembly 42 is situated over end 20 b of armature shaft 20 until an end 22 a FIG. During assembly of the motor 10the end cap assembly 42 is moved in the direction of arrow 46 in FIG.

An end 34 a of adjustment member 34 engages end 22 a of bearing Note that the end cap assembly 42 is moved until end 34 a of the adjustment member 34 is pushed into the aperture 35 FIG.

After the end cap assembly 42 is permanently secured to the housing 26the cylindrical wall portion 19 of the end lamina 18 is secured to the outer surface 34 b of the adjustment member 34 by suitable means, such as by use of an adhesive or laser weld.

In the embodiment being described, the adjustment member 34 is a polymer material and the wall portion 19 of end lamina 18 is a polymer material, but it should be understood that either or both may be metal or polymer.

To facilitate sliding the adjustment member 34 on to shaft 20 and into the opening 35 FIG. Note that the end play defined by the axial distance D FIG.

Alternatively, the end play distance D can be made to be zero or close to zero, which means that the end 34 a may engage and rotate against the end 22 a of bearing 22 when the shaft rotates.

A wear washer not shown may also be between end 22 a of bearing 22 and end 34 a of tube Advantageously, the invention enables the adjustment of the end play distance D to a predetermined or desired amount.

In the embodiment being described, it has been determined that one advantageous distance is between about 0. For example, in one illustrative embodiment the end play distance could be 0.

Reducing or eliminating the end play distance D entirely facilitates reducing or eliminating axial movement of the armature assembly 14 FIG.

After the end play distance D is adjusted to either zero or some desired distance, the tube 19 is secured to the adjustment member 34 by suitable means, such as a laser spot or circumferential weld mentioned earlier as diagrammatically illustrated with laser beams 60 in FIG.

The end cap assembly 42 was previously attached to the housing 26 by forming metal tabs 48 on the housing 26 over the end cap assembly 42 FIG.

Although not shown, it should be appreciated that the end lamina 18 and cylindrical portion 19 could be fastened onto the adjustment member 34 by any suitable means such as adhesive, laser weld, ultrasonic weld, staking i.

Also, the reverse concept of having fingers on the tube 35 sliding over a round tube 19 which in the embodiment referred to above has the fingers should be protected.

It should be understood that the plurality of slots 36 are not required, but may be incorporated to facilitate assembly of the motor. Certainly, just two round continuous tubular members could be used, or two of any type of shape triangular, octagonal, and such that telescope one inside of the other could also be used.

The motor comprises the same or similar components as the motor 10 illustrated in FIGS. The motor comprises a bearing retainer which is multi-functional in that it is capable of retaining a bearing FIG.

Details of the various components of the motor will now be described. The motor comprises an end cap FIGS. As illustrated in FIG. The wall is slotted to define a plurality of fingers b.

The wall also comprises a chamfered edge d FIG. Note that the wall comprises an outer surface a FIG. The brush holder assembly comprises the end cap having an end plate cap FIGS. After the over-molding process, the end plate cap comprises a first side a having the hub FIG.

The brush housing retainers and receive the brush housings andrespectively, comprising the brushes andas best illustrated in FIG.

The brushes and are coupled to the power supply not shown via a pair of conductors and as shown. Although not shown, it should be understood that between the brush housing retainers and the brush housings, one or more small cylindrical or other shape rubber elements may be provided to facilitate reducing vibration and noise.

As shown in FIG. The side b further comprises a connecter interface that receives a male connector not shown. Note that the plate FIG. An outer wall a of bearing retainer retains the bearing and simultaneously retains the brushes and in the position shown.

The bearing retainer and wall surface a may further comprise a plurality of projections FIGS. The projections cooperate with an inner wall surface a FIG. After the retainer is moved from the open position shown in FIG.

This permits the retainer to move freely in the direction of arrow B in FIG. The outer diameter defined by wall a FIG. As mentioned earlier herein, the embodiment illustrated functions to retain the brushes and in the open position illustrated in FIG.

The retainer functions in a manner similar to the adjustment member 34 described earlier herein relative to the embodiment shown in FIGS. As mentioned earlier, the surface a of retainer is dimensioned to be slidably, but snugly, received within the inside wall a FIG.

When an end a FIG. This provides clearance FIG. Thus, if zero endplay is desired, then the retainer would be forced in the opposite direction of arrow C FIG.

After the retainer is moved to the desired position within the hubthe hub is secured to the retainer in a manner similar to that described earlier herein relative to the first embodiment. For example and as illustrated in FIG.

This causes the retainer to be secured and affixed to the hub Note that a through-transmission laser welding process may also be used of the type shown and described earlier herein relative to the embodiment shown in FIG.

It should be understood that through-transmission laser welding is a process where the laser beam passes through the outside material dispersing very little energy, but upon hitting the inner surface which is purposely made absorbent, dissipates heat, causing a melt zone which fuses the two pieces of plastic together.

It should also be appreciated that the hub could also comprise a plurality of slotted fingers, similar to the projections or fingers 21 FIG.

Advantageously, this system and method provide a bearing retainer that is capable of retaining brushes, such as brushes andin an open position of the type illustrated in FIGS.

This may be beneficial during shipping or even manufacturing of the motor The retainer FIG. The retainer has yet another feature in that it retains the bearing in a retained position during assembly and use.

Thus, the retainer comprises and defines an assembly and approach for accomplishing multiple functions with a minimal amount of parts.

While the system and method described, constitute preferred embodiments of this invention, it is to be understood that the invention is not limited to this precise system and method, and that changes may be made in either without departing from the scope of the inventions, which is defined in the appended claims.

All rights reserved. A SumoBrain Solutions Company. Login Sign up. Search Expert Search Quick Search. Electric motor and method for reducing end play.

United States Patent

width="189" height="255" alt="electric motor shaft end play">

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This invention relates to electric motors and, more particularly, to an electric motor having an adjustment member situated on an armature shaft and cooperating with another member to reduce or eliminate armature axial end play, thereby reducing noise, heat and undesired vibration. A conventional motor shaft is fastened to a driven member, such as a window lift linkage or assembly, a drive gear or the like, a blower wheel or fan or the like, so that rotational motion can be transferred from the shaft to the driven member. Due to various factors, such as tolerances in the length of the lamina stack, bearings, motor end caps, end laminas, motor frame, commutator axial position, and the like, a gap, or often called end play, can result between the bearing axial thrust surface s and the axial thrust surface s on the armature. Too little end play, or sometimes called negative end play, can cause undesired noise, heat, and premature failure. Automotive manufacturers and motor manufacturers have undertaken efforts to minimize this end play distance. One conventional approach incorporates either hard or resilient washers that are positioned between the armature and bearing thrust surface s to resist movement of the armature relative to the frame.

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Maintaining the proper axial internal clearance or end play of the rotor relative to the stator of an electric motor is very important for successful operation of sleeve bearing motors. Insufficient clearance causes excessive wear of thrust surfaces and may prevent low torque motors from starting. Excessive clearance also causes objectionable end bumping noise at motor start up and also can create alignment problems for external shaft mounted components such as gears, blowers and impeller.

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Конечно, выслушал бы все то, что ты больна RV-41. Как это полиция _оставила_ участок. - спросила Николь.

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