KR20140085090A - Parking apparatus for automatic transmission - Google Patents

Parking apparatus for automatic transmission Download PDF

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Publication number
KR20140085090A
KR20140085090A KR1020120155279A KR20120155279A KR20140085090A KR 20140085090 A KR20140085090 A KR 20140085090A KR 1020120155279 A KR1020120155279 A KR 1020120155279A KR 20120155279 A KR20120155279 A KR 20120155279A KR 20140085090 A KR20140085090 A KR 20140085090A
Authority
KR
South Korea
Prior art keywords
parking
sprag
parking gear
projection member
automatic transmission
Prior art date
Application number
KR1020120155279A
Other languages
Korean (ko)
Inventor
전재민
Original Assignee
현대 파워텍 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 현대 파워텍 주식회사 filed Critical 현대 파워텍 주식회사
Priority to KR1020120155279A priority Critical patent/KR20140085090A/en
Publication of KR20140085090A publication Critical patent/KR20140085090A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/005—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles by locking of wheel or transmission rotation
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission

Abstract

The disclosed present invention relates to a parking device for an automatic transmission. The disclosed parking device for an automatic transmission includes: a parking rod moving straight in conjunction with a conversion of a selection lever; a sprag installed on a transmission housing to be rotated and rotated in the direction of a parking gear installed by being pushed out by the parking rod; a first protrusion member protruding from the side of the sprag facing the parking gear and hung on the parking gear; and a second protrusion member protruding from the side of the sprag spaced apart from the first protrusion member and hung on the parking gear.

Description

[0001] PARKING APPARATUS FOR AUTOMATIC TRANSMISSION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a parking apparatus for an automatic transmission, and more particularly, to a parking apparatus for an automatic transmission that can improve the operational reliability of an automatic transmission by increasing a braking force of the automatic transmission.

Generally, the automatic transmission is equipped with a parking device that locks the parking gear provided on the output shaft in the "P" (Parking Range) range by sprags to maintain the vehicle in a stopped state.

When the select lever provided on the vehicle is converted into the "P" range, the control lever, the select shaft, and the detent lever associated therewith rotate integrally to push the parking rod, do.

Since one end of the sprag is rotatably installed on the sprag shaft, when the parking rod moves and contacts the sprag, the sprag rotates about the sprag shaft.

As a result, the sprag projections integrally provided in the sprags are inserted and engaged with the gears of the parking gear, thereby locking the automatic transmission.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2009-0111961 (published on October 28, 2009, entitled "Parking Device for Automatic Transmission").

Since the number of sprocket projections connected to the sprocket is one, when the weight of the vehicle is increased, the capacity of the parking gear for the automatic transmission is insufficient and the operational reliability is lowered. Therefore, there is a need to improve this.

It is an object of the present invention to provide a parking apparatus for an automatic transmission that is capable of improving the operational reliability of an automatic transmission by increasing the braking force of the automatic transmission.

A parking device for an automatic transmission according to the present invention includes: a parking rod that linearly moves in conjunction with a change of select lever; a sprocket that is rotatably installed in the transmission housing and is rotated in a direction in which a parking gear is pushed by the parking rod; And a second projection member protruding from a side surface of the sprag opposite to the gear to engage with the parking gear, and a second projection member protruding from the side surface of the sprag member spaced apart from the first projection member and engaged with the parking gear.

The parking rod preferably includes a rod body that is linearly moved toward a direction in which the sprag is installed, and a cap member that has a wedge-shaped sloped surface and is mounted on the tip of the rod body.

The sprags preferably include a body portion hinged to the transmission housing by a sprag shaft and contact protrusions extending from the body portion and located in a path through which the cap member is moved.

It is preferable that the first projection member and the second projection member protrude from the side of the body portion facing the parking gear.

The distance between the first projection member and the second projection member preferably corresponds to the width of the engagement tooth provided on the outside of the parking gear.

It is also preferable that the first projection member and the second projection member are provided along the same circumferential shape as the outer periphery of the parking gear.

In the parking device for an automatic transmission according to the present invention, the first projection member and the second projection member engage with the parking gear in association with the movement of the parking rod, thereby increasing the braking force of the automatic transmission. The operation reliability of the automatic transmission can be improved.

1 is an internal configuration diagram of a parking apparatus for an automatic transmission according to an embodiment of the present invention.
2 is an enlarged cross-sectional view of the portion "A" in Fig.
3 is a cross-sectional view schematically showing a state in which the first projection member and the second projection member are engaged with the parking gear according to an embodiment of the present invention.
4 is a perspective view schematically showing a sprag according to an embodiment of the present invention.

Hereinafter, an embodiment of a parking apparatus for an automatic transmission according to the present invention will be described with reference to the accompanying drawings. For convenience of explanation, a parking apparatus for an automatic transmission installed in a vehicle will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is an internal configuration diagram of a parking apparatus for an automatic transmission according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a portion "A" FIG. 4 is a perspective view schematically showing a sprag according to an embodiment of the present invention. FIG. 4 is a perspective view schematically showing a sprag according to an embodiment of the present invention.

1 to 4, a parking apparatus 1 for an automatic transmission according to an embodiment of the present invention includes a parking rod 10 that is linearly moved in conjunction with a select lever change, a transmission housing 10 A sprocket 20 which is rotatably mounted on the parking gear 10 and is rotated in a direction in which the parking gear 60 is mounted by being pushed by the parking rod 10 and a sprocket 20 protruding from the side of the sprocket 20 facing the parking gear 60 The first projection member 30 engaged with the parking gear 60 and the second projection member 40 projecting from the side surface of the sprag 20 separated from the first projection member 30 and engaged with the parking gear 60 .

When the select lever provided in the vehicle is converted to the "P" range, the parking rod 10 is linearly moved in conjunction with the change of the select lever.

The parking rod 10 according to one embodiment includes a rod body 12 that is linearly moved toward a direction in which the sprags 20 are installed and a cap member 12 that has a wedge- (14).

The movement of the parking rod 10 is guided by the guide portion 54 provided on the transmission housing 50. For this purpose, the guide portion 54 is installed to surround the outside of the parking rod 10.

The sprags 20 that are pushed by the parking rod 10 provided with the cap member 14 and rotated in the direction in which the parking gear 60 is installed can be formed in various shapes within a technical concept that is rotatably installed in the transmission housing 50 .

One side of the sprag 20 (reference left side in Fig. 1) is rotatably mounted on the sprag shaft 52, and this sprag shaft 52 is inserted into the transmission housing 50.

Therefore, when the parking rod 10 moves and contacts the sprags 20, the sprags 20 rotate about the sprag shaft 52. As a result,

The sprag 20 according to one embodiment includes a body portion 22 hingedly connected to the transmission housing 50 by a sprag shaft 52 and a body portion 22 extending from the body portion 22, And a contact protrusion 24 located in a path where the contact surface 24 is exposed.

The body portion 22 is rotated around the sprag shaft 52 and a contact projection 24 is provided on the other side (reference right side in FIG. 1) of the body portion 22.

A return spring (not shown) is wound around the sprag shaft 52.

One end of the return spring is supported by the sprag 20 and the other end is supported by the transmission housing 50 so that when the sprag 20 is rotated in contact with the parking rod 10, Provides an elastic return force.

On the other hand, the contact protrusion 24 provided in the sprag 20 is located in the passage where the parking rod 10 is moved by being bent upward from the body portion 22.

The corner of the contact projection 24 is formed in a curved shape, and the cap member 14 of the parking rod 10, which is linearly moved, pushes the contact projection 24 in the downward direction. Thus, the sprag 20 is pushed by the cap member 14 and rotated.

The first projection member 30 and the second projection member 40 protruding from the side surface of the body portion 22 facing the parking gear 60 are spaced from each other at a predetermined interval.

That is, the first projection member 30 protrudes from the side surface of the sprag 20 facing the parking gear 60, and is hooked on the parking gear 60.

The second projection member 40 spaced from the first projection member 30 may be formed in various shapes within the technical idea of being protruded from the side surface of the sprag 20 and caught by the parking gear 60.

The first projection member 30 and the second projection member 40 protruding from the side surface of the sprag 20 facing the parking gear 60 are engaged with the engaging teeth 62 of the parking gear 60 And are engaged with mounting grooves 64 provided on both sides of the engaging tooth 62 to restrain the rotation of the parking gear 60.

The distance between the first projection member 30 and the second projection member 40 corresponds to the width of the engagement tooth 62 provided on the outside of the parking gear 60.

One engaging tooth 62 of the parking gear 60 is inserted between the first projection member 30 and the second projection member 40. The engaging tooth 62 is engaged with the first projection member 30, And the second projection member 40, thereby restricting the rotation of the parking gear 60 more stably.

The first projection member 30 and the second projection member 40 are provided along the same circumferential shape as the outer periphery of the parking gear 60. That is, since the outer periphery of the parking gear 60 is formed in a circular shape, the first projection member 30 coupled to the parking gear 60 and the second projection member 40 connected to the body portion 22 Are also formed in a cylindrical shape.

The first projection member 30 and the second projection member 40 are provided along the circumference so that the first projection member 30 and the second projection member 40 are simultaneously coupled to the outside of the parking gear 60 The braking force of the automatic transmission parking device 1 can be improved.

Hereinafter, the operating state of the parking device 1 for an automatic transmission according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, when the select lever of the vehicle is converted into the "P" range in a state where the parking rod 10 is spaced apart from the sprag 20, , The parking rod 10 is moved to rotate the sprag 20 in a direction in contact with the parking gear 60.

The contact protrusion 24 moves downward along the inclined surface of the cap member 14 when the cap member 14 provided on the parking rod 10 moves while pushing the contact protrusion 24 of the sprag 20.

The first projection member 30 connected to the sprags 20 and the second projection member 40 connected to the sprags 20 are also rotated with the sprags 20 rotated about the sprag shaft 52 to the lower side in contact with the parking gear 60 And is inserted into the mounting groove 64 provided on the outside of the parking gear 60 to restrain the rotation of the parking gear 60.

The first projection member 30 and the second projection member 40 constrain the rotation of the parking gear 60 at the same time so that even if any one of the first projection member 30 and the second projection member 40 is broken, The rotation of the gear 60 can be restrained. Therefore, the operation reliability of the parking device 1 for an automatic transmission is improved.

In contrast to the prior art, the shape of the toothed portion connected to the parking rod 10 is changed without changing the basic operation principle of the parking device 1 for an automatic transmission, so that the braking capacity of the parking device 1 for an automatic transmission The production cost can be reduced.

The first projection member 30 and the second projection member 40 are engaged with the parking rod 10 in the parking (parking) position in cooperation with the movement of the parking rod 10, Since the braking force of the automatic transmission is increased by engaging with the gear 60, the braking force change due to the increase in the weight of the vehicle can be easily accommodated, and the operational reliability of the automatic transmission is also improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

In addition, although a parking apparatus for an automatic transmission installed in an automobile has been described as an example, the present invention is merely an example, and a parking apparatus for an automatic transmission according to the present invention may be used for other mechanical apparatuses equipped with automatic transmissions.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

1: Parking device for automatic transmission
10: parking rod 12: rod body
14: cap member 20: sprags
22: body portion 24: contact projection
30: first projection member 40: second projection member
50: Transmission housing 52: Spragg shaft
54: guide portion 60: parking gear
62: retaining tooth 64: mounting groove

Claims (6)

A parking rod linearly moved in conjunction with the change of the select lever;
A sprocket rotatably installed in the transmission housing and rotated in a direction in which the parking gear is installed by being pushed by the parking rod;
A first projection member protruding from a side surface of the sprag facing the parking gear and engaged with the parking gear; And
And a second projection member protruding from a side surface of the sprag member spaced apart from the first projection member and engaged with the parking gear.
The method according to claim 1,
Wherein the parking rod has a rod body that is linearly moved toward a direction in which the sprag is installed; And
And a cap member having a wedge-shaped inclined surface and mounted on a front end of the rod body.
3. The method of claim 2,
The sprag includes a body portion hinged to the transmission housing by a sprag shaft; And
And a contact protrusion extending from the body portion and positioned in a path along which the cap member is moved.
The method of claim 3,
Wherein the first protrusion member and the second protrusion member protrude from a side surface of the body portion facing the parking gear.
5. The method of claim 4,
And the distance between the first projection member and the second projection member corresponds to the width of the engagement tooth provided on the outside of the parking gear.
6. The method of claim 5,
Wherein the first protrusion member and the second protrusion member are installed along the same circumferential shape as the outer circumference of the parking gear.
KR1020120155279A 2012-12-27 2012-12-27 Parking apparatus for automatic transmission KR20140085090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120155279A KR20140085090A (en) 2012-12-27 2012-12-27 Parking apparatus for automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120155279A KR20140085090A (en) 2012-12-27 2012-12-27 Parking apparatus for automatic transmission

Publications (1)

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KR20140085090A true KR20140085090A (en) 2014-07-07

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KR1020120155279A KR20140085090A (en) 2012-12-27 2012-12-27 Parking apparatus for automatic transmission

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180075978A (en) * 2016-12-27 2018-07-05 현대 파워텍 주식회사 Parking system for vehicle and parking rod assembly thereof
CN109944939A (en) * 2017-12-20 2019-06-28 韩虎产业株式会社 Electric automobile gear device parking apparatus and its method for diagnosing faults
CN111350819A (en) * 2020-03-17 2020-06-30 浩夫尔动力总成（上海）有限公司 Parking mechanism of automobile transmission
CN113734118A (en) * 2021-11-08 2021-12-03 杭州非古科技有限公司 New energy automobile parking structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180075978A (en) * 2016-12-27 2018-07-05 현대 파워텍 주식회사 Parking system for vehicle and parking rod assembly thereof
CN109944939A (en) * 2017-12-20 2019-06-28 韩虎产业株式会社 Electric automobile gear device parking apparatus and its method for diagnosing faults
KR20190074645A (en) * 2017-12-20 2019-06-28 한호산업(주) Parking apparatus for transmission apparatus of electric vehicle and method for fault detecting thereof
CN111350819A (en) * 2020-03-17 2020-06-30 浩夫尔动力总成（上海）有限公司 Parking mechanism of automobile transmission
CN113734118A (en) * 2021-11-08 2021-12-03 杭州非古科技有限公司 New energy automobile parking structure

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