GB2460679A - Worm gear actuator having an electric circuit to sense motor stall - Google Patents

Worm gear actuator having an electric circuit to sense motor stall Download PDF

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Publication number
GB2460679A
GB2460679A GB0810266A GB0810266A GB2460679A GB 2460679 A GB2460679 A GB 2460679A GB 0810266 A GB0810266 A GB 0810266A GB 0810266 A GB0810266 A GB 0810266A GB 2460679 A GB2460679 A GB 2460679A
Authority
GB
United Kingdom
Prior art keywords
motor
cable
electric circuit
worm
stopper means
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0810266A
Other versions
GB0810266D0 (en
Inventor
Yoshinori Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Electric SA
Original Assignee
Johnson Electric SA
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 Johnson Electric SA filed Critical Johnson Electric SA
Priority to GB0810266A priority Critical patent/GB2460679A/en
Publication of GB0810266D0 publication Critical patent/GB0810266D0/en
Publication of GB2460679A publication Critical patent/GB2460679A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/30—Non-dismountable or dismountable seats storable in a non-use position, e.g. foldable spare seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/065—Rear seats
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Transmission Devices (AREA)
  • Seats For Vehicles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A housing 4 and an actuator for pulling a cable 1 mounted therein. The housing defines a exit for the cable. The actuator includes a worm 7, a motor 10 drivingly coupled to the worm 7, gearing 6 meshing with the worm 7, a cable pulley 2 pivotally mounted in the housing 4 and driven by the gearing. A cable 1 to be pulled has one end fixed to the cable pulley 2. A first stopper 11 establishes a starting position for the cable pulley 2, and a second stopper 11 establishes a reversing position for the cable pulley 2. An electric circuit 3 supplies power to the motor 10 to cause rotation in one sense between the first and second stoppers, and in the opposite sense between the second and first stoppers. The electric circuit 3 senses motor stall at the second stopper and responsive thereto reverses the supply power to the motor 10 to reverse its driving direction to the opposite sense. The electric circuit 3 further senses motor stall at the first stopper and responsive thereto cuts off the supply power to the motor 10. The actuator is intended for use in a vehicle seat.

Description

SYSTEM AND WORM GEAR ACTUATOR FOR PULLING CABLE TO MOVE
OBJECT
BACKGROUND OF THE INVENtION
Field of the Invention
The present invention relates to a system and worm gear actuator for pulling a cable to move an object, and more particularly, a cable attached to a rear seat in a vehicle for the purpose of moving the seat from an upright position to a collapsed condition.
Prior art
Existing products are available on the market for cable pulling and most include the components necessary for this task including cable, cable pulley, gears, return spring, housing and cover, stopper for both ends of cable travel, an electric motor, an electrical device to open the motor circuit when the motor stalls. The main problem with existing products is the fact that the return spring is too expensive. Another problem with existing products is the fact that the motor needs more torque to pull the cable against return spring. The motor would need less torque without the return spring. Another problem with existing products is the fact that the face gear is too noisy.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a system and worm gear actuator for pulling a cable to move an object, and more particularly, a cable attached to a rear seat in a vehicle for the purpose of moving the seat from an upright position to a collapsed condition. The system and link actuator does not include a return spring so the cost of the actuator is less expensive. Another object of the invention is to provide an actuator that occupies less space and has less weight. Since less torques is * ** required, the motor can occupies less space and has less weight. Another object of the invention is to provide an actuator that operates with less noise. Use of a worm gear is *.** less noisy than using a face gear.
: ** The purpose of the present invention is to provide a system and worm gear actuator *S.. * ***
S
*.S. 1 * * S ** S
S
*S.*S5 * * with reduced cost, weight, space, and noise that will putt a cable to move an object, and more particularly, a cable attached to a second row seat in a vehicle to fold and flip the second row seat from an upright position to a collapsed position.
The invention includes the components of a cable, a cable pulley, a spur gear, a second spur gear, a worm, a worm wheel gear, gear housing, shaft, stopper for each end of travel, a motor, an electrical circuitry or device to reverse the motor rotation direction when the motor is stalled during cable pulling and to open circuit when the motor is stafled during returning. The components are arranged in a novel manner.
Other and further objects of the invention will become apparent from the following detailed description of preferred embodiments of the invention when taken in conjunction with the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view as seen from the top of the novel cable pulling actuator with worm gear drive, shown with cover removed.
Figure 2 is a perspective view as seen from the bottom of the novel cable pulling actuator with worm gear drive, shown with spur gear and worm wheel removed and with cover removed.
Figure 3 is a perspective view showing the stoppers on the gear housing of the cable pull actuator with worm gear drive.
Figure 4 is a perspective view from the bottom showing the stoppers on the spur gear and cable pulley.
Figure 5 is a sectional side view along two gears of the cable pull actuator with worm gear drive with cover removed.
Figure 6 is a sectional end view perpendicular to the worm of the cable pull actuator with worm gear drive with cover removed.
Figure 7 shows bottom views showing, respectively, the original or starting position and *:*::* the pulled position. * * S...
DETAILED DESCRITION OF PREFERRED EMBODIMENTS OF THE INVENTION
Referring now to the drawings, the components of the system and actuator consist of S..
I
*.** 2 * I * I. *
S
I
nine main components, including a cable 1, a cable pulley 2, a spur gear 6, a second spur gear 8, a worm 7, a worm wheel gear 9, gear housing 4, shaft or pin 5, stopper 11 for each end of travel, a motor 10, an electrical circuitry or device 3 to reverse the motor rotation direction when the motor is stalled during cable pulling and to open circuit when the motor is stalled during returning. The components are arranged in a novel manner.
The function of these parts or components will now be described.
The cable I connects or is attached to a seat latch of a second row seat in a vehicle to fold and flip the second row seat from an upright position to a collapsed position upon release of the latch and pulling on the cable 1. When cable I is pulled the seat back flips and when the cable I is pulled again, the whole seat folds down to a collapsed position.
Cable pulley 2 supports the cable 1 along a guide on its periphery while motor 10 is operating (pulling the cable 1). Cable pulley 2 is mounted on a shaft to be freely rotatable around the shaft. The shaft is fixed to the housing.
Electrical circuitry or device 3 is mounted on the motor 10 and is itself connected to vehicle electrical wires running to the vehicle battery and generator. and serves to start motor 10 running when receiving a signal from the vehicle controller and to reverse the motor 10 running direction when the motor is stalled during pulling of the cable 1, and to open circuit when the motor 10 is stalled while returning to its starting position, Gear housing 4, which includes a cover, support gears, pins, and motor 10, and protects them from external force.
Component 5 name: Pin or shaft 5 supports second spur gear B and enables free rotation of the second spur gear 8 around this pin. Also, it determines center distance or axis of rotation of second spur gear 8. S...
::::e Spur gear 6 provides reduced speed and increased torque from second spur gear 8 to
S e.S s 3 * 0 S. *
re pulley 2.
Worm 7 is attached to the motor 19 output shaft and transfers and increases torque from motor 10 to the worm wheel gear 9.
Second Spur gear 8 reduces speed and increases torque from worm wheel gear 9 to spur gear 6.
Worm wheel gear 9 transfers and increases torque from worm 7 to second spur gear 8.
Motor 10 changes electrical energy to mechanical energy, and rotates rotate worm 7 through the motor output shaft.
Stopper 11 provided for both ends of travel determine the angular position for reversing and stopping motor 10 by causing stalling of the motor 10.
As noted above, the actuator of the invention is primarily intended for use in a vehicle to flip and fold a rear or second row seat. The vehicle electrical circuitry is connected in a known manner using one or more connectors as part of the electrical circuitry or device 3 of the actuator. In this manner, a supply voltage and current is obtained from the vehicle to operate the motor 10. The connector(s) of the actuator connect to the voltage and current supplies of the vehicle and thus, the electrical circuitry or device 11 supplies voltage and current draw to the motor 10 when a signal is received from the vehicle to pull the cable 1. The electrical circuitry or device 3 may have other functions, such as, to suppress electrical magnetic interference.
As noted the electrical circuitry or device 3 can have suppression of electrical magnetic *:*:* interference and at least one hall sensor. The motor shaft may be directly or indirectly connected to the worm shaft. * *
Vehicle electrical wires are connected to suitable connectors of the actuator and supply
SOS
S
* 5550 4 * S S *5 5
S
*.S.S5 * S / voltage and current to the motor 10. The connectors of the actuator are part of the electrical circuitry and device 3 and the electrical circuitry and device 3 supplies voltage and current draw to the motor 10 when a signal is received from the vehicle controller instructing the actuator to pull the cable 1. The electrical circuitry and device 3 is mounted on the motor end and provides the necessary circuitry between its connectors and the motor 10. The electrical circuitry and device 3 may have other functions, such as, to suppress electrical magnetic interference.
The second spur gear 8 can be eliminated when one spur gear set provides enough speed reduction. Also, both of the spur gears can be eliminated when one worm gear set provides enough speed reduction. The cable pulley 2 and spur gear 6 is located under the worm wheel gear 9, but the cable pulley 2 and spur gear 6 can located at another place in the gear housing.
The interconnections of the main components and the sub-components are as follows.
Vehicle electrical wire(s) connects to the connector(s) of the actuator and supply voltage and current to the motor 10 from the vehicle battery or generator. The connector is part of the electrical circuitry and device 3 of the actuator and interconnects the vehicle voltage and current draw to the motor 10 when a signal is received from the vehicle controller to pull the cable 1. Electrical circuitry and device 3 also has the function of reversing direction of the motor 10 when the motor 10 stalls while pulling the cable 1.
After motor 10 is stalled once, while pulling the cable 1, electrical circuitry and device 3 stops supplying voltage to the motor 10, if motor 10 stalls while returning to its starting position. Motor 10 drives worm 7 and worm 7 drives worm wheel gear 9. Worm wheel gear 9 drives second spur gear 8 and second spur gear S drives spur gear 6 fixed to cable pulley 2. Spur gear 6 and cable pulley 2 pull the cable 1. If a signal from the vehicle is still on after the motor is returned to its the original position the electrical circuitry and device 3 has stopped supplying voltage to the motor 10, electrical circuitry ***. and device 3 starts supplying voltage to the motor again. *S*
if it is intended not to use the two spur gears 6 and 8, worm 7 and worm wheel gear 9 * * * S. * *..*.S * should have a substantial gear reduction, such as 1: 200. Also, worm wheel gear 9 will need to be attached to the cable pulley 2.
The operation of the invention is as follows. The motor 10 is reversed immediately upon sensing that the motor stalled, even if the motor 10 has not reached its reversing position. For example, attempting to flip a seat while something, such as a bag, is on the seat, will not succeed. If the seat cannot be flipped, this will restrict the actuator and cause the motor 10 to stall. In this case, the motor 10 will be immediately reversed. In normal operation, without any restriction on the actuator, the motor 10 will run until the motor 10 reaches its reversing position, i.e. when the stopper 11 is contacted at this position preventing any further movement of the motor 10 in the same direction. Thus the motor stalls and is reversed, i.e. driven in the opposite sense until it reaches it original or starting position where it will again stall because of the impediment of the stopper 11 at this position.
Although the invention has been described in terms of preferred embodiments, nevertheless changes will be evident to those of ordinary skill in the art from the teachings hereof. Such changes are deemed to fall within the purview of the claims. * ** * S * * S. * * S e.e * .* * . . S.
S *.. * *** 6 * * . * .
S.....

Claims (10)

  1. VT IS CLAIMED IS: 1. An actuator for pulling a cable comprising a worm, a motor drivirigly coupled to the worm, geanng meshing with said worm, a cable pulley pivotally mounted and driven by said gearing, a cable to be pulled having one end fixed to said cable pulley, first stopper means for establishing a starting position for said cable pulley, second stopper means for establishing a reversing position for said cable pulley, and electric circuit means to supply power to said motor to cause said motor to rotate in one sense between the first stopper means and the second stopper means, and in the opposite sense between the second stopper means and the first stopper means, said electric circuit means sensing motor stall at the second stopper means and responsive thereto reversing the supply power to the motor to reverse its driving direction to the opposite sense, said electric circuit means further sensing motor stall at the first stopper means and responsive thereto cutting off the supply power to the motor.
  2. 2. An actuator according to claim I wherein said electric circuit means further includes sensing stalling of the motor driving in the opposite sense before reaching its starting position and responsive thereto cutting of the supply power.
  3. 3. An actuator according to claim I wherein said electric circuit means further includes sensing stalling of the motor driving in the one sense before reaching its reversing position and responsive thereto reversing the motor drive to the opposite sense.
  4. 4. An actuator according to claim I wherein said gearing includes a worm wheel gear, a first spur gear meshing therewith and a second spur gear meshing with the first spur gear.
  5. 5. An actuator according to claim 1 wherein said electric circuit means includes at least one connector for connecting to a vehicle power supply.
  6. 6. The combination of a housing and an actuator for pulling a cable mounted therein, said housing defining an exit for the cable, said actuator, comprising a worm, a motor drivingly coupled to the worm, gearing meshing with said worm, a cable pulley S..* pivotally mounted in said housing and driven by said gearing, a cable to be pulled having one end fixed to said cable pulley, first stopper means for establishing a starting *S.* .7 * SS S. S * *** .SS * for said cable pulley, second stopper means for establishing a reversing position for said cable pulley, and electric circuit means to supply power to said motor to cause said motor to rotate in one sense between the first stopper means and the second stopper means, and in the opposite sense between the second stopper means and the first stopper means, said electric circuit means sensing motor stall at the second stopper means and responsive thereto reversing the SUPi power to the motor to reverse its driving direction to the opposite sense, said electric circuit means further sensing motor stall at the first stopper means and responsive thereto cutting off the supply power to the motor.
  7. 7. The combination according to claim 6 wherein said electric circuit means further includes sensing stalling of the motor driving in the opposite sense before reaching its starting position and responsive thereto cutting of the supply power.
  8. 8. The combination according to claim 6 wherein said electric circuit means further includes sensing stalling of the motor driving in the one sense before reaching its reversing position and responsive thereto reversing the motor drive to the opposite sense.
  9. 9. The combination according to claim 6 wherein said gearing includes a worm wheel gear, a first spur gear meshing therewith and a second spur gear meshing with the first spur gear.
  10. 10. The combination according to claim 6 wherein said electric circuit means includes at least one connector for connecting to a vehicle power supply. * ** * * * * ** * * * ** * * * I.. **. * * * * S. SS * S
GB0810266A 2008-06-05 2008-06-05 Worm gear actuator having an electric circuit to sense motor stall Withdrawn GB2460679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0810266A GB2460679A (en) 2008-06-05 2008-06-05 Worm gear actuator having an electric circuit to sense motor stall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0810266A GB2460679A (en) 2008-06-05 2008-06-05 Worm gear actuator having an electric circuit to sense motor stall

Publications (2)

Publication Number Publication Date
GB0810266D0 GB0810266D0 (en) 2008-07-09
GB2460679A true GB2460679A (en) 2009-12-09

Family

ID=39638205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0810266A Withdrawn GB2460679A (en) 2008-06-05 2008-06-05 Worm gear actuator having an electric circuit to sense motor stall

Country Status (1)

Country Link
GB (1) GB2460679A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106218460A (en) * 2015-06-02 2016-12-14 现代自动车株式会社 Rumble seat actuator
CN108237951A (en) * 2017-12-12 2018-07-03 北京车和家信息技术有限公司 Seat adjuster, automotive seat and vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088603A (en) * 1965-06-16 1967-10-25 Exchange Telegraph Company Ltd Ink ribbon feed reversing device
GB2021395A (en) * 1978-05-19 1979-12-05 Philips Nv Citrus etc. fruit presses
US4553656A (en) * 1983-10-27 1985-11-19 Amerock Corporation Power actuated operator for windows and the like
US5568970A (en) * 1994-07-18 1996-10-29 Prineppi; Frank J. Apparatus for moving an ornament and drive means therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088603A (en) * 1965-06-16 1967-10-25 Exchange Telegraph Company Ltd Ink ribbon feed reversing device
GB2021395A (en) * 1978-05-19 1979-12-05 Philips Nv Citrus etc. fruit presses
US4553656A (en) * 1983-10-27 1985-11-19 Amerock Corporation Power actuated operator for windows and the like
US5568970A (en) * 1994-07-18 1996-10-29 Prineppi; Frank J. Apparatus for moving an ornament and drive means therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106218460A (en) * 2015-06-02 2016-12-14 现代自动车株式会社 Rumble seat actuator
CN108237951A (en) * 2017-12-12 2018-07-03 北京车和家信息技术有限公司 Seat adjuster, automotive seat and vehicle
CN108237951B (en) * 2017-12-12 2019-09-27 北京车和家信息技术有限公司 Seat adjuster, automotive seat and vehicle

Also Published As

Publication number Publication date
GB0810266D0 (en) 2008-07-09

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)