CN111550553B - Locking device for a parking lock of a motor vehicle - Google Patents
Locking device for a parking lock of a motor vehicle Download PDFInfo
- Publication number
- CN111550553B CN111550553B CN202010079667.0A CN202010079667A CN111550553B CN 111550553 B CN111550553 B CN 111550553B CN 202010079667 A CN202010079667 A CN 202010079667A CN 111550553 B CN111550553 B CN 111550553B
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- China
- Prior art keywords
- locking
- recess
- switching element
- bolt
- release
- 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.)
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- 239000012530 fluid Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
Images
Classifications
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- 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
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- 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
- F16H63/3441—Parking locks engaging axially
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- 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
- F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a locking device for a parking lock of a motor vehicle, comprising: a switching element for locking at least one operating state of the parking brake is provided, which has at least one locking recess; a locking body which is arranged in a hole provided for this purpose in a housing of the locking device; and a locking bolt having a release recess, wherein the locking body is movable in the bore between a locking position and a release position, wherein the locking body is partially accommodated in the release recess on the locking bolt in the release position, and wherein the locking body is partially accommodated in at least one locking recess on the switching element in the locking position, wherein furthermore the spring bears at least indirectly against the locking bolt and acts on the locking bolt by means of a spring force, wherein the locking bolt is hydraulically actuatable against the spring force in order to move the locking body in the housing.
Description
Technical Field
The invention relates to a locking device for a parking lock of a motor vehicle. The parking brake is designed for this purpose to engage, by means of a locking claw, into a toothing of a parking brake gear of the motor vehicle transmission when actuated by the driver of the motor vehicle, in order to prevent the rotation of a driven shaft of the transmission, which is operatively connected to the parking brake gear, by means of this engagement of the locking claw, and thus to prevent the motor vehicle from slipping off. The locking device is designed to lock an operating state of the parking brake, for example to lock an engaged (parking position) or disengaged (driving position) of the parking brake.
Background
A locking mechanism for a parking lock is known, for example, from DE 10 2012 215 418 A1. The locking mechanism comprises a support member, a switching member movable into and out of at least one locking position relative to the support member and lockable in the locking position, a stop device having at least one locking body and at least one control body formed separately from the locking body. The locking device is movable into and out of a locking position relative to the support member at least when the switching member is in the locking position, wherein the locking device locks the switching member in the locking position and the movement of the switching member out of the locking position is released by the movement of the locking device out of the locking position. Furthermore, the actuating element, which is formed separately from the locking device, can be moved into and out of the active position relative to the support member at least when the switching member is in the locking position, wherein the locking device is moved into the locking position by the movement of the actuating element into the active position.
Disclosure of Invention
The object of the present invention is to provide an alternative locking device. This object is achieved by the subject matter of the present invention. Preferred embodiments are available below.
The locking device for a parking lock of a motor vehicle according to the present invention includes: a switching element for locking at least one operating state of the parking brake is provided, which has at least one locking recess; a locking body which is arranged in a hole provided for this purpose in a housing of the locking device; and a locking bolt having a release recess, wherein the locking body is movable in the bore between a locking position and a release position, wherein the locking body is partially accommodated in the release recess on the locking bolt in the release position, and wherein the locking body is partially accommodated in at least one locking recess on the switching element in the locking position, wherein furthermore the spring bears at least indirectly against the locking bolt and acts on the locking bolt by means of a spring force, wherein the locking bolt is hydraulically actuatable against the spring force in order to move the locking body in the housing.
In other words, by hydraulically actuating the locking bolt, a hydraulic pressure is built up on the locking bolt, wherein the locking bolt is moved in the housing and consequently the locking body is switched between the release position and the locking position. The locking body is moved from a release recess on the locking bolt through a hole in the housing into at least one locking recess on the switching element. For this purpose, the switching element is in a lockable position, i.e. at least one locking recess on the switching element is positioned at the level of the bore in the housing, and thus a partial accommodation of the locking body is possible. The return of the locking bolt into the release position is achieved by eliminating the hydraulic pressure on the locking bolt and the spring force on the locking bolt. As soon as the locking bolt has been returned to the release position by means of the spring force, the locking of the switching element is released, so that a movement of the switching element causes the locking body to move from the at least one locking recess on the switching element through the hole in the housing into the release recess on the locking bolt. The release recess on the locking bolt is positioned at the level of the hole in the housing and thereby enables a partial accommodation of the locking body.
Preferably, the spring pretensions the locking bolt into the release position, wherein the locking bolt can be moved into the locking position against the spring force by feeding hydraulic fluid into a chamber formed in the housing.
In particular, the switching element is configured as a shaft and is guided in the housing so as to be movable in the longitudinal direction. The locking body is thus movable in the bore of the housing transversely to the longitudinal direction of the switching element. Preferably, the locking bolt is arranged parallel to the switching element. Alternatively, the locking bolt can also be perpendicular to the shift element or have another arrangement.
The invention comprises the following technical teachings: the locking body is configured as a ball and rolls in a bore in the housing between the release recess and the at least one locking recess when the locking bolt is actuated. The diameter of the hole corresponds at least to the diameter of the locking body. The hole length is likewise, as well as the at least one locking recess on the switching element and the release recess on the locking bolt, smaller than the diameter of the locking body, so that the locking body is always held in the hole and protrudes either partly into the at least one locking recess on the switching element or partly into the release recess on the locking bolt and thereby locks or releases the switching element.
Preferably, the at least one locking recess on the switching element and the release recess on the locking bolt have at least one bevel. In particular, at least one locking recess on the switching element and a release recess on the locking bolt have a first and a second bevel, respectively. The locking body can be moved into and out of the locking recess or the release recess by means of a corresponding ramp, when the switching element or the locking bolt is moved, wherein the locking body is always guided in the bore of the housing during this movement.
Furthermore preferably, the switching element comprises: a first locking recess in which the locking body is partially accommodated in the parking position of the parking lock; and a second recess axially offset from the first recess, in which the lock body is accommodated in the running position of the parking lock.
Preferably, the release recess is formed as a circumferential groove on the locking bolt. In particular, the at least one locking recess is formed as a circumferential groove on the shift element. Preferably, the spring is designed as a compression spring. Furthermore, the spring is preferably a helical spring, which is arranged coaxially with the switching element and extends helically around the switching element.
Advantageously, a disk is arranged between the locking bolt and the spring, wherein the disk is arranged coaxially to the switching element. The disk is provided for axially receiving the spring and transmitting the spring force to the locking bolt.
In particular, the use of the locking device according to the invention in combination with a parking lock of a motor vehicle transmission is proposed. The locking device is preferably integrated in a motor vehicle transmission.
Drawings
The measures for further improving the invention are described in detail below together with a description of a preferred embodiment of the invention according to the figures. Here, it is shown that:
fig. 1 shows a schematic cross-section for illustrating a locking device according to the invention in a release position;
fig. 2 shows a schematic cross-section for illustrating the locking device according to fig. 1 in a locked position; and
fig. 3 shows a schematic perspective view of the locking device according to fig. 1 and 2.
Detailed Description
Fig. 1, 2 and 3 show a locking device 1 according to the invention for a parking lock, not shown here, of a motor vehicle. Fig. 1 shows the locking device 1 in a release position, wherein fig. 2 shows the locking position of the locking device 1. According to fig. 3, the state of the locking device 1 is not visible due to the illustration of the housing 6 of the locking device 1. It should be noted that not all reference numerals are labeled in all figures for reasons of perspective or cut-away.
According to fig. 1, 2 and 3, the locking device 1 according to the invention comprises: a switching element 2 having first and second locking recesses 3a, 3b; a locking body 4 which is arranged in a hole 5 provided for this purpose in a housing 6 of the locking device 1; and a locking bolt 7 having a release recess 8. The switching element 2 is configured as a shaft and is guided in the housing 6 in the release position so as to be movable in the longitudinal direction. The locking bolt 7 is arranged parallel to the switching element 2 and is guided in the housing 6 so as to be movable in the longitudinal direction in the locked position. The release recess 8 is likewise formed as a circumferential groove as is the case with the two locking recesses 3a,3 b.
The locking device 1 is provided for this purpose for locking the two operating states of the parking brake. The parking position of the parking lock is locked when the locking body 4 is partially accommodated in the first locking recess 3a, wherein the locking body 4 is partially accommodated in the second locking recess 3b locking the driving position of the parking lock.
The locking body 4 is movable in the bore 5 between a locking position and a release position, wherein the locking body 4 is partially accommodated in a release recess 8 on the locking bolt 7 in the release position. In contrast, the locking body 4 is partially accommodated in one of the two locking recesses 3a,3b on the switching element 2 in the locking position. The locking body 4 is designed as a ball and rolls in the opening 5 in the housing 6 between the release recess and the corresponding locking recess 3a,3b when the locking bolt 7 is actuated. The two latching recesses 3a,3b on the switching element 2 and the release recess 8 on the latching bolt 7 each have two inclined surfaces 10a,10b,11a,11 b. The inclined surfaces 10a,10b,11a,11b enable the locking body 4 to easily roll into the corresponding locking recess 3a,3b or release recess 8.
The spring 9 indirectly rests against the locking bolt 7 via a disk 12. In the present case, a disk 12 is arranged between the locking bolt 7 and the spring 9, wherein the disk 12 is arranged coaxially to the switching element 2. The spring 9 acts on the locking bolt 7 with its spring force via the disk 12, wherein the locking bolt 7 can be hydraulically actuated against the spring force of the spring 9 in order to move the locking body 4 in the housing 6.
According to fig. 1, the locking body 4 is partially accommodated in a release recess 8 on the locking bolt 7 and partially in the hole 5 on the housing 6. This position is defined as the release position of the locking device 1, since the switching element 2 is axially movable in this position, and thus the movement of the switching element 2 is released. In the release position, the locking body 4 is fixed in the bore 5 radially between the circumferential surface of the shift element 2 and the release recess 8 on the locking bolt 7 and parallel to the longitudinal direction of the shift element 2. The spring 9 is preloaded and presses or holds the locking bolt 7 in this release position. The radial distance between the circumferential surface of the locking bolt 7 and the circumferential surface of the switching element 2 is smaller than the diameter of the locking body 4. The diameter of the bore 5 corresponds substantially to the diameter of the locking body 4 and enables the locking body 4 to roll in the bore 5 with low friction between the locking position and the release position.
In fig. 2, the locking body 4 is partially accommodated in the second locking recess 3b on the locking bolt 7 and partially in the hole 5 on the housing 6. This position is defined as the locking position of the locking device 1, since the switching element 2 is axially immovable in this position, and thus the movement of the switching element 2 is locked. In the locking position, the locking body 4 is fixed in the bore 5 radially between the circumferential surface of the locking bolt 7 and the second locking recess 3b on the shift element 2 and parallel to the longitudinal direction of the shift element 2. The spring 9 is preloaded and presses or holds the locking bolt 7 in this release position. The two locking recesses 3a,3b on the switching element 2 are identically formed and are offset from one another in the longitudinal direction of the switching element 2. Therefore, the description of the locking position of the locking body 4 in the second locking recess 3b applies to the description of the locking position of the locking body 4 in the first locking recess 3a, which is not shown in the present case.
The change from the release position to the locking position is effected by the switching element 2 being moved axially into the parking or driving position and by hydraulic fluid being fed into a chamber 13 formed in the housing 6, whereby the locking bolt 7 is moved into the locking position against the spring force via the hydraulic fluid. At the same time, the locking body 4 is thereby moved into one of the two locking recesses 3a,3b on the switching element 2 and thereby locks the parking position or the driving position. In order to return the locking bolt 7 from the locking position into the release position, hydraulic fluid is discharged from the chamber 13, wherein the locking bolt 7 is thereby returned into the release position due to the spring force. Thereafter, the shift element 2 is moved axially and thereby the locking body 4 is moved into the release recess 8 on the shift element 2.
According to fig. 3, the locking device 1 does not show the switching element 2 for simplicity. A mounting opening 14 for the passage of the locking body 4 into the bore 5 for feeding hydraulic fluid into the chamber 13 is formed in the housing 6 of the locking device 1. The housing 6 is in the present case cylindrical and has a central bore 16 for receiving and guiding the switching element 2.
List of reference numerals
1. Locking device
2. Switching element
3a,3b locking recesses
4. Locking body
5. Hole(s)
6. Shell body
7. Locking bolt
8. Release recess
9. Spring
10a,10b inclined surfaces on the locking recesses
11a,11b release recesses
12. Disk
13. Cavity(s)
14. Mounting opening
15. Passage opening
16. Center hole
Claims (8)
1. A locking device (1) for a parking lock of a motor vehicle, comprising: a switching element (2) for locking at least one operating state of the parking lock is provided, said switching element having at least one locking recess (3 a,3 b); a locking body (4) which is arranged in a hole (5) provided for this purpose in a housing (6) of the locking device (1); and a locking bolt (7) having a release recess (8), wherein the locking body (4) is movable in the bore (5) between a locking position and a release position, wherein the locking body (4) is partially accommodated in the release recess (8) on the locking bolt (7) in the release position, and wherein the locking body (4) is partially accommodated in the at least one locking recess (3 a,3 b) on the switching element (2) in the locking position, wherein furthermore a spring (9) is at least indirectly applied to the locking bolt (7) and acts on the locking bolt (7) by means of a spring force, wherein the locking bolt (7) can be hydraulically actuated against the spring force in order to move the locking body (4) in the housing (6), the locking bolt (7) being arranged parallel to the switching element (2), and a disk (12) being arranged between the locking bolt (7) and the spring (9), wherein the disk (12) is arranged coaxially to the switching element (2).
2. Locking device (1) according to claim 1,
characterized in that the switching element (2) is designed as a shaft and is guided in the housing (6) so as to be movable in the longitudinal direction.
3. Locking device (1) according to claim 1,
characterized in that the at least one locking recess (3 a,3 b) on the switching element (2) and the release recess (8) on the locking bolt (7) have at least one bevel (10 a,10b,11a,11 b).
4. A locking device (1) according to claim 3,
characterized in that the release recess (8) is formed as a circumferential groove on the locking bolt (7).
5. A locking device (1) according to claim 3,
characterized in that the at least one locking recess (3 a,3 b) is formed as a circumferential groove on the switching element (2).
6. Locking device (1) according to claim 1,
the spring (9) is designed as a compression spring.
7. Locking device (1) according to claim 1,
characterized in that the locking body (4) is designed as a ball and rolls between the release recess (8) and the at least one locking recess (3 a,3 b) in the bore (5) in the housing (6) when the locking bolt (7) is actuated.
8. Locking device (1) according to any of the preceding claims,
the spring (9) pretensions the locking bolt (7) into the release position, wherein the locking bolt (7) can be moved into the locking position against the spring force by feeding hydraulic fluid into a chamber (13) formed in the housing (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019103105.2 | 2019-02-08 | ||
| DE102019103105.2A DE102019103105B3 (en) | 2019-02-08 | 2019-02-08 | Locking device for a parking lock of a motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111550553A CN111550553A (en) | 2020-08-18 |
| CN111550553B true CN111550553B (en) | 2023-06-02 |
Family
ID=71615822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010079667.0A Active CN111550553B (en) | 2019-02-08 | 2020-02-04 | Locking device for a parking lock of a motor vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111550553B (en) |
| DE (1) | DE102019103105B3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022118135A1 (en) | 2022-07-20 | 2024-01-25 | Jopp Holding GmbH | Parking lock for a motor vehicle with a locking mechanism |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004012952A1 (en) | 2004-03-17 | 2005-12-01 | Robert Bosch Gmbh | Spring-operated parking brake device |
| US8053691B2 (en) | 2007-12-21 | 2011-11-08 | GM Global Technology Operations LLC | Park inhibition solenoid assembly |
| JP2009275797A (en) * | 2008-05-14 | 2009-11-26 | Toyota Motor Corp | Controller of vehicle |
| DE102011009831A1 (en) | 2011-01-31 | 2012-08-02 | Schaeffler Technologies Gmbh & Co. Kg | Device for locking e.g. switching shaft of automatic or automated gear box of motor car, has locking element connected with switching element for locking or releasing element and releasably fixed with interposition of ball by plunger |
| DE102012210571A1 (en) * | 2012-06-22 | 2013-12-24 | Zf Friedrichshafen Ag | Device for actuating a locking mechanism |
| DE102012215418B4 (en) | 2012-08-30 | 2015-04-30 | Jopp Holding GmbH | locking mechanism |
| US9145113B2 (en) * | 2013-05-24 | 2015-09-29 | GM Global Technology Operations LLC | Transmission parking pawl actuation assembly |
| CN104763803A (en) * | 2015-04-23 | 2015-07-08 | 中国重汽集团大同齿轮有限公司 | Transmission fork shaft base control mechanism |
-
2019
- 2019-02-08 DE DE102019103105.2A patent/DE102019103105B3/en active Active
-
2020
- 2020-02-04 CN CN202010079667.0A patent/CN111550553B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111550553A (en) | 2020-08-18 |
| DE102019103105B3 (en) | 2020-08-06 |
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Effective date of registration: 20240320 Address after: 1st Floor, Building 2, No. 1 Antuo Road, Anting Town, Jiading District, Shanghai Patentee after: SCHAEFFLER HOLDING(CHINA) Co.,Ltd. Country or region after: China Address before: German Herzogenaurach Patentee before: SCHAEFFLER TECHNOLOGIES AG & CO. KG Country or region before: Germany |