KR20130056681A - Worm wheel for dc motor - Google Patents

Worm wheel for dc motor Download PDF

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Publication number
KR20130056681A
KR20130056681A KR1020110122406A KR20110122406A KR20130056681A KR 20130056681 A KR20130056681 A KR 20130056681A KR 1020110122406 A KR1020110122406 A KR 1020110122406A KR 20110122406 A KR20110122406 A KR 20110122406A KR 20130056681 A KR20130056681 A KR 20130056681A
Authority
KR
South Korea
Prior art keywords
worm wheel
rib
gear
motor
motor device
Prior art date
Application number
KR1020110122406A
Other languages
Korean (ko)
Inventor
정재구
Original Assignee
동양기전 주식회사
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 동양기전 주식회사 filed Critical 동양기전 주식회사
Priority to KR1020110122406A priority Critical patent/KR20130056681A/en
Publication of KR20130056681A publication Critical patent/KR20130056681A/en

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Classifications

    • 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
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/06—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion with worm and worm-wheel or gears essentially having helical or herring-bone teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears

Abstract

PURPOSE: A worm wheel for DC motor equipment is provided to remarkably improve durability by improving a structure in which a body part and a gear part are connected with a rib. CONSTITUTION: A ring type gear part(20) is equipped with a gear according to an outer periphery. A body part(30) is arranged to be separated toward the inner side of the gear part and is equipped with a damper accommodating part(32). The damper accommodating part accommodates a damper. A rib(40) connects the gear part and the body part. The rib is a one body type rib which is extended along the edge of the body part and has a valley and a peak in the thickness direction of the body part.

Description

Worm wheel for DC motor unit {Worm wheel for DC motor}

The present invention relates to a worm wheel which is a mechanical element for changing and transmitting the rotational torque and the rotational direction of the motor in a DC motor device.

A DC motor device is a device that converts electrical energy into mechanical energy using a DC power source as a power source. DC motor devices are used in a variety of industries, including automobiles.

As an example of a DC motor device, a power window motor device is adopted as a lifting device for lifting a door window up and down in a door of a vehicle. An example of a general power window motor apparatus is disclosed in Japanese Patent Laid-Open No. 2002-67150.

In a direct current motor device such as a power window motor device, the worm wheel 1 shown in FIG.

The worm wheel 1 is a circular mechanical element in which gears are machined on its outer circumferential surface. The worm wheel 1 meshes with a worm (not shown) provided on a rotating shaft of the motor to transmit power. The worm wheel 1 may be deformed or cracked in the course of long-term use due to the torsional force acting in the power transmission process. Therefore, the gears around the worm wheel 1 should be manufactured with high durability. However, increasing the thickness in order to improve the durability around the gear portion has a limit in the package configuration and there is a problem that the eccentric motion may occur in the rotation process if the gear portion is too heavy than the center of the worm wheel (1).

Therefore, the conventional worm wheel 1 has a structure in which the gear part 2 and the body part 3 are separated into a double wall and the ribs 4 are connected between the walls in order to improve durability. Adopted. However, the conventional worm wheel 1 as shown in FIG. 1 has a problem that is insufficient to ensure sufficient durability. That is, there is a problem that cracks, etc. occur at the connection portion between the ribs 4 and the wall, thereby deteriorating the durability of the worm wheel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a worm wheel for a DC motor device, which is light in weight and remarkably improved by improving a structure connecting ribs to a body part and a gear part as devised to solve the above problems.

In order to achieve the above object, a worm wheel for a DC motor device according to an embodiment of the present invention, in a worm wheel for a DC motor device for converting the rotation torque and the rotation direction of the motor,

A gear unit having a ring shape in which gears are formed along an outer circumferential surface thereof;

A body part disposed spaced inwardly of the gear part and having a damper accommodating part capable of accommodating a damper; And

And a rib connecting the gear part and the body part.

The rib is an integral rib extending along the circumference of the body portion, characterized in that the ribs and the floor formed in the thickness direction of the body portion.

The rib is preferably in the form of a wave pattern.

The worm wheel for a DC motor device according to the present invention is a single rib having ribs connected to one along the circumference of the body part and provided with a valley and a floor in the thickness direction of the body part, so that the overall weight is substantially maintained, while the durability is remarkably improved. It is effective to provide a worm wheel for the.

1 is a view showing the structure of a worm wheel for a conventional DC motor device.
2 is a view showing the structure of a worm wheel for a DC motor device according to an embodiment of the present invention.
3 is a partial cutaway view showing the structure of the rib of the worm wheel for the DC motor device shown in FIG.
4 is a view of the worm wheel for the DC motor device shown in FIG. 3 viewed from another direction.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing the structure of a worm wheel for a DC motor device according to an embodiment of the present invention. 3 is a partial cutaway view showing the structure of the rib of the worm wheel for the DC motor device shown in FIG. 4 is a view of the worm wheel for the DC motor device shown in FIG. 3 viewed from another direction.

2 to 4, the worm wheel 10 for a DC motor device according to a preferred embodiment of the present invention is a mechanical element for converting the rotational torque and the rotational direction of the motor. The worm wheel 10 may be made of a known synthetic resin material, such as polypropylene.

The worm wheel 10 for the DC motor device includes a gear portion 20, a body portion 30, and a rib 40.

The gear unit 20 is formed in a ring shape. Gears are formed on the outer circumferential surface of the gear unit 20.

The body portion 30 is disposed inside the gear portion 20. The body portion 30 is disposed to be spaced apart from the gear portion 20. The body portion 30 is provided with a damper receiving portion 32 that can accommodate a damper (not shown). The damper receiving portion 32 is divided into spaces by a plurality of radial ribs 34.

The rib 40 connects the gear portion 20 and the body portion 30. The rib 40 is provided to reduce the weight of the connecting section of the gear portion 20 and the body portion 30. In addition, the rib 40 is to reduce the transfer of the force to the body portion 30 when a force such as a torsional force to the gear portion 20 to suppress the damage to the body portion 30 Do it. The rib 40 is an integral rib extending along the periphery of the body portion 30. That is, the rib 40 is formed in the form of a band. The rib 40 has a valley 42 and a floor 45 in the thickness direction of the body portion 30. The ribs 40 may be wavy, for example, as shown in FIGS. 3 and 4.

The following describes how the durability of the worm wheel 10 for a DC motor device having the structure as described above is improved.

It is assumed that the worm wheel 10 for the DC motor device is applied to, for example, a power window motor device. When the motor rotates, the worm and the worm wheel 10 are gear-coupled to the rotating shaft of the motor so that the worm wheel 10 rotates dependently. In this process, the torque conversion effect occurs due to the gear ratio difference between the worm wheel 10 and the worm. In addition, since the rotation axis of the worm and the worm wheel 10 is generally disposed vertically, the rotation direction is changed. A window regulator (not shown) connected to the worm wheel 10 performs a linear motion to raise or lower the window of the vehicle. In this process, when the window of the vehicle reaches the highest position or reaches the lowest position, reaction force is generated while contacting the door. This reaction force is picked up by the power transmission components and transmitted to the motor. In this process, a rubber damper (not shown) coupled to the damper accommodating part 32 provided on the worm wheel 10 absorbs the shock. However, a reaction force not completely absorbed by the damper is transmitted to the worm wheel 10 to reach the engagement portion of the gear portion 20 and the worm. In this process, the rib 40 generates a slight amount of elastic deformation to buffer such reaction forces. If such elastic deformation occurs repeatedly, a crack may occur at the connection portion between the rib 40 and the gear portion 20 or the connection portion between the rib 40 and the body portion 30. In this process, the rib 40 extends along the circumference of the body portion 30 as compared to the rib formed in the conventional worm wheel shown in FIG. 1, and the ribs 42 and the floor in the thickness direction of the body portion 30. 45 is formed. That is, the rib 40 is formed so that the torsion or reaction force is not concentrated in a specific position. That is, since the rib 40 forms the valley 42 and the floor 45, the rib 40, the gear part 20, and the body when a force such as a torsional force acts on the rib 40. Since the connection portion with the portion 30 is not formed linearly, there is an effect of preventing the stress from being concentrated and suppressing the occurrence of cracks.

As described above, the worm wheel for the DC motor device according to the present invention is a single rib having ribs connected to one along the circumference of the body and provided with valleys and floors in the thickness direction of the body so that the overall weight is maintained almost intact while the durability is significantly improved. There is an effect of providing a worm wheel for the motor unit.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications can be made by those skilled in the art within the technical scope of the present invention. Is obvious.

10: Worm wheel for DC motor device 20: Gear part
30: body portion 32: damper accommodation portion
34: radial rib 40: rib
42: goal 45: floor

Claims (2)

In a worm wheel for a DC motor device for converting the rotational torque and rotational direction of the motor,
A gear unit having a ring shape in which gears are formed along an outer circumferential surface thereof;
A body part disposed spaced inwardly of the gear part and having a damper accommodating part capable of accommodating a damper; And
And a rib connecting the gear part and the body part.
The rib is a one-piece rib extending along the circumference of the body portion worm wheel for the DC motor device, characterized in that the valley and the floor is formed in the thickness direction of the body portion. The method of claim 1,
The rib is a worm wheel for a DC motor device, characterized in that the wave pattern.
KR1020110122406A 2011-11-22 2011-11-22 Worm wheel for dc motor KR20130056681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110122406A KR20130056681A (en) 2011-11-22 2011-11-22 Worm wheel for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110122406A KR20130056681A (en) 2011-11-22 2011-11-22 Worm wheel for dc motor

Publications (1)

Publication Number Publication Date
KR20130056681A true KR20130056681A (en) 2013-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110122406A KR20130056681A (en) 2011-11-22 2011-11-22 Worm wheel for dc motor

Country Status (1)

Country Link
KR (1) KR20130056681A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854714A (en) * 2017-11-30 2019-06-07 日本电产株式会社 Worm gear unit, gear-box, gear motor and the electric product comprising gear motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854714A (en) * 2017-11-30 2019-06-07 日本电产株式会社 Worm gear unit, gear-box, gear motor and the electric product comprising gear motor

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E902 Notification of reason for refusal
E601 Decision to refuse application