US3583097A - Arrangement for attaching a miniature electrical motor - Google Patents

Arrangement for attaching a miniature electrical motor Download PDF

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US3583097A
US3583097A US787399A US3583097DA US3583097A US 3583097 A US3583097 A US 3583097A US 787399 A US787399 A US 787399A US 3583097D A US3583097D A US 3583097DA US 3583097 A US3583097 A US 3583097A
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motor
retaining plate
casing
frame
toy vehicle
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US787399A
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Wolfgang Richter
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Ernst Paul Lehmann Patentwerk
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Ernst Paul Lehmann Patentwerk
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H29/00—Drive mechanisms for toys in general
    • A63H29/22—Electric drives
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H19/00—Model railways
    • A63H19/02—Locomotives; Motor coaches
    • A63H19/10—Locomotives; Motor coaches electrically driven

Definitions

  • This invention relates to an arrangement for attaching a miniature electrical motor for driving a toy vehicle to a frame in the vehicle.
  • the motor is at each axial end provided with a cylindrical collar which is coaxial with the motor shaft, one of said collars engaging an opening in a transverse wall of the vehicle frame, whereas the other engages a semicylindrical groove in a detachable retaining plate which presses the motor down against its supporting base.
  • This motor can therefore be fixed in position by simply inserting one collar into the recess in the transverse wall of the frame and then securing the retaining plate to the frame. This can be done for instance by means of a single screw.
  • the motor is thus axially and radially located because it bears firmly against the transverse wall and against its supporting base.
  • the motor with a cylindrical outer casing and at the same time to provide means which prevent the casing from rotating.
  • such means consist of at least one projection at the end face of the motor, said projection engaging a corresponding recess in the transverse wall of the frame.
  • two such projections extending in diagonally opposite directions could be provided, thereby permitting the motor to be inserted in two 180? relatively displaced positions.
  • the motor For supplying the current it is preferred to provide at the end of the motor, which is located by the retaining plate, two axially parallel lugs. If the motor has two projections for peripherally locating the same against rotation, then the connecting lugs may be coplanar with the projections to permit the motor to be turned through 180 and the polarity of the lugs thereby reversed. This is a matter of importance in the case of DC motors, since the direction of travel of the vehicle can be readily reversed by turning the motor I80".
  • two spring arms of the retaining plate may be arranged to bear on the connecting lugs.
  • these spring arms will be connected by suitable leads to the current collectors of the vehicle or to a battery.
  • the spring arms are attached to the underside of the retaining plate in such manner that they can be firmly wedged between the retaining plate and the frame when the retaining plate is screwed to the frame.
  • the spring arms may have the form of strip-shaped sheet metal contacts located underneath the retaining plate and having connecting elements which project upwards beyond the top of the retaining plate.
  • each strip contact may comprise an angled soldering tab for connection thereto of a current lead as well as a spring contact for connecting up other points of current con sumption.
  • a point of current consumption may be illuminating equipment.
  • the retaining plate may be provided with two supplementary soldering points. If this is the case, the soldering points are used for connecting up the current supply leads and each one of the soldering points may be connected through one of the coils to the soldering tab of one of the strip contacts, both soldering points being interconnected through the capacitor.
  • the same For lateral location of the retaining plate, the same may be inserted into a recess in the frame and for its longitudinal location it may be provided with lateral projections engaging slots extending crosswise of the motor shaft.
  • FIG. I is a plan view ofa toy vehicle frame and ofan electric motor inserted therein,
  • FIG, 2 is a cross-sectional view, in the direction of the arrow 11 in FIG. 1, to show the transverse wall after the motor has been removed,
  • FIG. 3 is a view of the end face of the motor intended to bear against the transverse wall
  • FIGS. 4 and 5 are sections taken on the lines lV-IV and V-V in FIG. 2 after insertion of the motor
  • FIG. 6 is a section taken on the line VI-VI in FIG. 5, and
  • FIG. 7a is a plan view and FIG. 7b is a side view respectively ofa strip contact.
  • An electric motor I with a cylindrical casing is provided at each ofits axial end faces 2 and 3 coaxially with its motor shaft 4, with cylindrical collars 5 and 6 respectively.
  • the collars 5 and 6 contain the bearings of the motor shaft 4 which projects from the motor through the collar 5 where it carries a pinion 7 cooperating with driving gearing marked 8.
  • the gearing 8 is mounted in a frame 9 inside a casing 10 and it is separated from the motor 1 by a transverse wall 11.
  • the gearing 8 transmits torque through a gearwheel I2 to an axle 13 for the running wheels 14 which on their insides bear against a sliding current collecting contact 15.
  • the transverse wall 11 forms part of a detachable sidewall 16 and is insertable into guideways 17 in the casing 10.
  • the transverse wall II has an opening 18 for the reception of the collar 5 at the one end 2 of the motor 1. Moreover, the transverse wall I] is formed with one recess 19 and the casing with a similar recess 20 (FIG. 2) which are each engaged by one of two diametrically opposite projections 21 and 21' (FIG. 3) on the end face 2 of the motor I and thus prevent the motor casing from turning.
  • a retaining plate 23 is provided for locating the end face 3 of the motor 1. This retaining plate 23 is approximately level with the motor shaft 4 and rests in a recess 22 in the frame 9. A portion 23' of the plate 23 projecting from the recess 22 has a substantially semicircular groove 24 (FIG. 6) which cooperates with the collar 6 on the end face 3 of the motor 1 and presses the cylindrical casing 25 of the motor I against a supporting base 26 in the frame 9.
  • the retaining plate 23 may be attached to the frame 9 for instance by means of a screw 27. This plate 23 is secured against lengthwise displacement by lateral extensions 28, 28' which engage slots 29, 29 respectively extending crosswise of the motor axis, and against lateral displacement by the sidewalls 30,30 of the recess 22.
  • the motor 1 is supplied with current through two lugs 31, 31' extending parallel to its axis and projecting from the end face 3 in a plane parallel to the base 126.
  • Spring arms 32, 32' affixed to the retaining plate 21 bear on the lugs 31, 31'; each arm forming part of a strip contact 33.
  • each strip contact 33 has a soldering tab 34 (FIGS. 71: and 7b) and a spring contact blade 35.
  • the two strip contacts 33 are attached to the underside of the retaining plate 21 and only their contact-making ends, i.e. the ends of the soldering tabs 34 and the contact blades 35 project from the plate. As will be understood more particularly by reference to FIG. 7b. the contact blades 35 project obliquely upwards from the retaining plate 21.
  • the strip contact 33 containing two oppositely angled bends in the region ofits spring arm.
  • soldering points 36, 36 Besides the spring contacts 33 of the retaining plate 21 carries two soldering points 36, 36. These permit an interference suppressor comprising two coils 37, 37', and a capacitor 38 to be mounted on the retaining plate 21 to prevent the running toy vehicle from causing interference with radio and television receivers.
  • the wiring is so arranged that the connecting wires 39, 40 from the sliding contacts are taken to the soldering points 36, 36', each of which is connected through one of the coils 37, 37' to the corresponding soldering tab of one of the strip contacts 33 which by means of its spring arm 32 cooperates with the corresponding connecting lug 31, 31' of the motor 1.
  • the soldering points 36 are also interconnected by the low capacitance capacitor 38.
  • the contact blades 35 serve for connecting up other points of consumption, such as illuminating means and other devices.
  • an electric motor including a casing, a drive shaft and a collar at each face end of the casing on the outside thereof, said drive shaft beingjournaled in said collars;
  • a first support assembly comprising a transverse wall including an opening mounted within said frame, one of said collars being received in said opening for supporting the respective end ofthe motor casing;
  • a second support assembly comprising a retaining plate including an elongate groove of semicylindrical cross section, an elongate counter member secured to the frame and disposed underneath said retaining plate and said casing, and releasable fastening means for holding said retaining plate against said counter member upon tightening of the fastening means, said other collar being received in said groove, tightening of said fastening means pressing the casing against said counter member.
  • a driving means for a toy vehicle as claimed in claim I in which the end face of the motor casing, which is held by said retaining plate, is provided for the supply of electric current with two axial parallel connecting lugs.
  • a driving means for a toy vehicle as claimed in claim I in which the retaining plate carries an interference suppressor comprising two coils and a capacitor.
  • a driving means for a toy vehicle as claimed in claim I in which for lateral location said retaining plate is fitted into a recess in the frame and for longitudinal location has lateral extensions engaging slots beyond said recess.

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Abstract

An arrangement for attaching a miniature electric motor for driving a toy vehicle to a frame in the vehicle, in which the motor is provided at each axial end with a cylindrical collar which is coaxial with its shaft, one of said collars engaging in said aperture in said transverse wall while the other rests in a semicylindrical groove in a detachable retaining plate which presses the motor against a supporting base.

Description

United States Patent Inventor Wolfgang Richter Nurnberg, German Appl. No. 787,399 Filed Dec. 27. I968 Patented June 8, 1971 Assignee Ernst Paul Lehmann Patentwerk Nurnberg, Germany Priority June 26, 1968 Germany P 17 03 671.4
ARRANGEMENT FOR ATTACHING A MINIATURE ELECTRICAL MOTOR 6 Claims, 8 Drawing Figs.
U.S. Cl 46/243, 46/2 I 7 Int. Cl A63h 33/26 [50] Field ofSearchv 46/243, 216,217
[56] References Cited UNITED STATES PATENTS 3.027.682 4/l962 Schlau 46/243X Primary E.tanziner Louis G. Mancene Assislan! E.raminerR0bert F. Cutting Attorney-Heme & Baxley ABSTRACT: An arrangement for attaching a miniature electric motor for driving a toy vehicle to a frame in the vehicle, in which the motor is provided at each axial end with a cylindrical collar which is coaxial with its shaft, one of said collars engaging in said aperture in said transverse wall while the other rests in a semicylindrical groove in a detachable retaining plate which presses the motor against a supporting base.
ARRANGEMENT FOR ATTACIIING A MINIATURE ELECTRICAL MOTOR BACKGROUND TO THE INVENTION Different methods of affixation of miniature motors are known in the art. Some of these require several and in some instances complicated, fixing elements while in others as' sembly takes a considerable amount of time, so that generally speaking these means of fixation do not give satisfaction. Moreover, frequently the motor is not sufficiently firmly held and faults are then likely to arise in course of use.
It is the object of the present invention to provide a simple arrangement for attaching a miniature electrical motor in such a way that assembly is easy and quick to accomplish and that, nevertheless, the motor is sufficiently securely located.
This invention relates to an arrangement for attaching a miniature electrical motor for driving a toy vehicle to a frame in the vehicle.
According to the present invention the motor is at each axial end provided with a cylindrical collar which is coaxial with the motor shaft, one of said collars engaging an opening in a transverse wall of the vehicle frame, whereas the other engages a semicylindrical groove in a detachable retaining plate which presses the motor down against its supporting base.
This motor can therefore be fixed in position by simply inserting one collar into the recess in the transverse wall of the frame and then securing the retaining plate to the frame. This can be done for instance by means of a single screw. The motor is thus axially and radially located because it bears firmly against the transverse wall and against its supporting base.
However, it has been found advantageous to provide the motor with a cylindrical outer casing and at the same time to provide means which prevent the casing from rotating. Preferably such means consist of at least one projection at the end face of the motor, said projection engaging a corresponding recess in the transverse wall of the frame. Naturally two such projections extending in diagonally opposite directions could be provided, thereby permitting the motor to be inserted in two 180? relatively displaced positions.
For supplying the current it is preferred to provide at the end of the motor, which is located by the retaining plate, two axially parallel lugs. If the motor has two projections for peripherally locating the same against rotation, then the connecting lugs may be coplanar with the projections to permit the motor to be turned through 180 and the polarity of the lugs thereby reversed. This is a matter of importance in the case of DC motors, since the direction of travel of the vehicle can be readily reversed by turning the motor I80".
According to another feature of the invention two spring arms of the retaining plate may be arranged to bear on the connecting lugs. Generally these spring arms will be connected by suitable leads to the current collectors of the vehicle or to a battery.
Preferably the spring arms are attached to the underside of the retaining plate in such manner that they can be firmly wedged between the retaining plate and the frame when the retaining plate is screwed to the frame. More particularly, the spring arms may have the form of strip-shaped sheet metal contacts located underneath the retaining plate and having connecting elements which project upwards beyond the top of the retaining plate.
According to another feature of the invention the connecting elements of each strip contact may comprise an angled soldering tab for connection thereto of a current lead as well as a spring contact for connecting up other points of current con sumption. Such a point of current consumption may be illuminating equipment.
It is also within the scope of the invention to mount two coils and a capacitor on the retaining plate to serve as an interference suppressor.
In order to facilitate the affixation of the interference suppressor the retaining plate may be provided with two supplementary soldering points. If this is the case, the soldering points are used for connecting up the current supply leads and each one of the soldering points may be connected through one of the coils to the soldering tab of one of the strip contacts, both soldering points being interconnected through the capacitor.
For lateral location of the retaining plate, the same may be inserted into a recess in the frame and for its longitudinal location it may be provided with lateral projections engaging slots extending crosswise of the motor shaft.
BRIEF DESCRIPTION OF DRAWINGS FIG. I is a plan view ofa toy vehicle frame and ofan electric motor inserted therein,
FIG, 2 is a cross-sectional view, in the direction of the arrow 11 in FIG. 1, to show the transverse wall after the motor has been removed,
FIG. 3 is a view of the end face of the motor intended to bear against the transverse wall,
FIGS. 4 and 5 are sections taken on the lines lV-IV and V-V in FIG. 2 after insertion of the motor,
FIG. 6 is a section taken on the line VI-VI in FIG. 5, and
FIG. 7a is a plan view and FIG. 7b is a side view respectively ofa strip contact.
DESCRIPTION OF PREFERRED EMBODIMENT OF THE INVENTION An electric motor I with a cylindrical casing is provided at each ofits axial end faces 2 and 3 coaxially with its motor shaft 4, with cylindrical collars 5 and 6 respectively. The collars 5 and 6 contain the bearings of the motor shaft 4 which projects from the motor through the collar 5 where it carries a pinion 7 cooperating with driving gearing marked 8.
The gearing 8 is mounted in a frame 9 inside a casing 10 and it is separated from the motor 1 by a transverse wall 11. The gearing 8 transmits torque through a gearwheel I2 to an axle 13 for the running wheels 14 which on their insides bear against a sliding current collecting contact 15. The transverse wall 11 forms part ofa detachable sidewall 16 and is insertable into guideways 17 in the casing 10.
The transverse wall II has an opening 18 for the reception of the collar 5 at the one end 2 of the motor 1. Moreover, the transverse wall I] is formed with one recess 19 and the casing with a similar recess 20 (FIG. 2) which are each engaged by one of two diametrically opposite projections 21 and 21' (FIG. 3) on the end face 2 of the motor I and thus prevent the motor casing from turning.
A retaining plate 23 is provided for locating the end face 3 of the motor 1. This retaining plate 23 is approximately level with the motor shaft 4 and rests in a recess 22 in the frame 9. A portion 23' of the plate 23 projecting from the recess 22 has a substantially semicircular groove 24 (FIG. 6) which cooperates with the collar 6 on the end face 3 of the motor 1 and presses the cylindrical casing 25 of the motor I against a supporting base 26 in the frame 9.
The retaining plate 23 may be attached to the frame 9 for instance by means of a screw 27. This plate 23 is secured against lengthwise displacement by lateral extensions 28, 28' which engage slots 29, 29 respectively extending crosswise of the motor axis, and against lateral displacement by the sidewalls 30,30 of the recess 22.
The motor 1 is supplied with current through two lugs 31, 31' extending parallel to its axis and projecting from the end face 3 in a plane parallel to the base 126. Spring arms 32, 32' affixed to the retaining plate 21 bear on the lugs 31, 31'; each arm forming part of a strip contact 33. Besides the spring arms 32 each strip contact 33 has a soldering tab 34 (FIGS. 71: and 7b) and a spring contact blade 35. The two strip contacts 33 are attached to the underside of the retaining plate 21 and only their contact-making ends, i.e. the ends of the soldering tabs 34 and the contact blades 35 project from the plate. As will be understood more particularly by reference to FIG. 7b. the contact blades 35 project obliquely upwards from the retaining plate 21. In order to increase the spring effect of the spring arm 32 the strip contact 33 containing two oppositely angled bends in the region ofits spring arm.
Besides the spring contacts 33 of the retaining plate 21 carries two soldering points 36, 36. These permit an interference suppressor comprising two coils 37, 37', and a capacitor 38 to be mounted on the retaining plate 21 to prevent the running toy vehicle from causing interference with radio and television receivers. The wiring is so arranged that the connecting wires 39, 40 from the sliding contacts are taken to the soldering points 36, 36', each of which is connected through one of the coils 37, 37' to the corresponding soldering tab of one of the strip contacts 33 which by means of its spring arm 32 cooperates with the corresponding connecting lug 31, 31' of the motor 1. The soldering points 36 are also interconnected by the low capacitance capacitor 38. The contact blades 35 serve for connecting up other points of consumption, such as illuminating means and other devices.
It will therefore be understood that the invention permits all the soldering to be done prior to the assembly of the motor.
For assembling the motor 1 the only operation required is that of attaching the retaining plate 2l to the frame 9 by means of the screw 27.
lclaim:
l. A driving means for a toy vehicle with an electric motor for driving at least one wheel of the vehicle. said toy comprising in combination:
an electric motor including a casing, a drive shaft and a collar at each face end of the casing on the outside thereof, said drive shaft beingjournaled in said collars;
a frame for said casing;
a first support assembly comprising a transverse wall including an opening mounted within said frame, one of said collars being received in said opening for supporting the respective end ofthe motor casing; and
a second support assembly comprising a retaining plate including an elongate groove of semicylindrical cross section, an elongate counter member secured to the frame and disposed underneath said retaining plate and said casing, and releasable fastening means for holding said retaining plate against said counter member upon tightening of the fastening means, said other collar being received in said groove, tightening of said fastening means pressing the casing against said counter member.
2. A driving means for a toy vehicle as claimed in claim 1, in which the motor is cylindrical, and means are provided to prevent said casing from rotating comprising at least one projection which cooperates with a corresponding recess in said transverse wall ofthe first support assembly.
3. A driving means for a toy vehicle as claimed in claim I, in which the end face of the motor casing, which is held by said retaining plate, is provided for the supply of electric current with two axial parallel connecting lugs.
4. A driving means for a toy vehicle as claimed in claim 1, in which spring arm contact strips for carrying electric current to said motor are located below said retaining plate, and each said contact strip has an angled-off soldering tab for connection thereto of a current supply wire and a spring contact blade for making connections to other points of current consumption.
5. A driving means for a toy vehicle as claimed in claim I, in which the retaining plate carries an interference suppressor comprising two coils and a capacitor.
6. A driving means for a toy vehicle as claimed in claim I, in which for lateral location said retaining plate is fitted into a recess in the frame and for longitudinal location has lateral extensions engaging slots beyond said recess.

Claims (6)

1. A driving means for a toy vehicle with an electric motor for driving at least one wheel of the vehicle, said toy comprising in combination: an electric motor including a casing, a drive shaft and a collar at each face end of the casing on the outside thereof, said drive shaft being journaled in said collars; a frame for said casing; a first support assembly comprising a transverse wall including an opening mounted within said frame, one of said collars being received in said opening for supporting the respective end of the motor casing; and a second support assembly comprising a retaining plate including an elongate groove of semicylindrical cross section, an elongate counter member secured to the frame and disposed underneath said retaining plate and said casing, and releasable fastening means for holding said retaining plate against said counter member upon tightening of the fastening means, said other collar being received in said groove, tightening of said fastening means pressing the casing against said counter member.
2. A driving means for a toy vehicle as claimed in claim 1, in which the motor is cylindrical, and means are provided to prevent said casing from rotating comprising at least one projection which cooperates with a corresponding recess in said transverse wall of the first support assembly.
3. A driving means for a toy vehicle as claimed in claim 1, in which the end face of the motor casing, which is held by said retaining plate, is provided for the supply of electric current with two axial parallel connecting lugs.
4. A driving means for a toy vehicle as claimed in claim 1, in which spring arm contact strips for carrying electric current to said motor are located below saId retaining plate, and each said contact strip has an angled-off soldering tab for connection thereto of a current supply wire and a spring contact blade for making connections to other points of current consumption.
5. A driving means for a toy vehicle as claimed in claim 1, in which the retaining plate carries an interference suppressor comprising two coils and a capacitor.
6. A driving means for a toy vehicle as claimed in claim 1, in which for lateral location said retaining plate is fitted into a recess in the frame and for longitudinal location has lateral extensions engaging slots beyond said recess.
US787399A 1968-06-26 1968-12-27 Arrangement for attaching a miniature electrical motor Expired - Lifetime US3583097A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435274A1 (en) * 1978-09-05 1980-04-04 Lamoureux Christian Scale model of trolley-bus - has poles connecting it to overhead power line through contacts in case and on motor
US4438590A (en) * 1981-11-11 1984-03-27 The Refined Industry Company, Limited Electric motor toy car

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027682A (en) * 1959-02-23 1962-04-03 Strombeck Becker Mfg Co Toy vehicle steering means

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027682A (en) * 1959-02-23 1962-04-03 Strombeck Becker Mfg Co Toy vehicle steering means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435274A1 (en) * 1978-09-05 1980-04-04 Lamoureux Christian Scale model of trolley-bus - has poles connecting it to overhead power line through contacts in case and on motor
US4438590A (en) * 1981-11-11 1984-03-27 The Refined Industry Company, Limited Electric motor toy car

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ES358300A1 (en) 1970-06-01
GB1190500A (en) 1970-05-06
FR1582413A (en) 1969-09-26

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