CN112912649B - Parking lock device and method of assembling the same - Google Patents
Parking lock device and method of assembling the same Download PDFInfo
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- CN112912649B CN112912649B CN201980070175.0A CN201980070175A CN112912649B CN 112912649 B CN112912649 B CN 112912649B CN 201980070175 A CN201980070175 A CN 201980070175A CN 112912649 B CN112912649 B CN 112912649B
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- parking lock
- support element
- housing
- pawl
- transmission
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The invention relates to a parking lock (10) having a parking lock housing (20), a locking pawl (12), an actuating unit (24) and a support element (18), the locking pawl (12) having a ratchet tooth (16) which can be locked in a parking lock wheel (56) and a pawl contour (44) arranged on the rear side of the ratchet tooth (16), the actuating unit (24) acting on the pawl contour (44) when engaging the parking lock (10) in order to rotate the locking pawl (12) relative to the parking lock housing (20) about a rotational axis (14), the actuating unit (24) being supported at different positions on the support element (18) in an engaged state (P) and a disengaged state (nP) of the parking lock (10). The support element (18) is connected to the parking lock housing (20) so as to have play. The invention also relates to an assembly method of the parking lock device and a vehicle transmission with the parking lock device.
Description
Technical Field
The invention relates to a parking lock device, an assembling method thereof and a transmission with the parking lock device.
Background
A parking lock is known, for example, from DE 10144063 a 1. It describes a parking lock in an automatic transmission of a motor vehicle, having a locking ring with a locking groove arranged on a drive shaft. When the device is in the locked state, the pawl is engaged with the locking groove via a pivotable selector lever and a link connected thereto. The link has a roller at its end, wherein a second roller guides the link in an L-shaped guide. The guide plate is fixed in a housing of the automatic transmission. When the connecting rod moves longitudinally, the second roller rolls on the guide plate. Thus, the guide plate comprises side walls and horizontally extending walls. The horizontally extending wall of the guide plate has an extending hole. The side wall of the guide plate is a separate component and has serrations on one edge. These projections match in their dimensions the extension holes in the horizontally extending wall and can be engaged in the openings in the horizontal wall by press-fitting.
Further parking locks are known from CN 104534087 a and DE 10144058. The latter shows a generic parking lock. The parking lock device has a locking pawl and an actuating unit, which are fixedly mounted to the transmission housing, so that a parking lock wheel arranged on the drive train can be supported. Different fixed reference points result in tolerances that have to be compensated. In particular, due to the manufacturing process, dimensional fluctuations occur between the centering hole in the housing and the contact surface of the actuating unit moving the locking pawl. Therefore, when installing the parking lock, adjustments must always be made to accurately position the pawl relative to the parking lock wheel. It is conceivable to transfer the adjustment work from the parking lock wheel/pawl interface to the lock pawl actuation mechanism interface of the lock pawl, for example an electric motor, but this results in the disadvantage that the parking lock with the actuator cannot be provided as a prefabricated module, which increases the installation effort.
Disclosure of Invention
The object of the invention is to improve the parking lock and to avoid the disadvantages described above. It is a further object of the invention to provide a transmission with a parking lock of this type and a simpler method of assembling the parking lock.
These objects are achieved by a parking lock device, a transmission, and a method as follows.
The parking lock device according to the present invention has a support member connected to the parking lock housing to have a play. The arrangement of the support element with play makes it possible to transfer the necessary adjustment work from the interface between the locking pawl and the parking lock wheel to the parking lock itself. The play is selected such that the normally occurring manufacturing tolerances can be compensated by the play. The "floating" arrangement of the support element within the limits therefore introduces an additional degree of freedom, enabling internal compensation for manufacturing tolerances. The self-adjusting, self-aligning of the support element enables the entire parking lock to be assembled as a prefabricated unit without the need to compensate for manufacturing tolerances during assembly.
More importantly, by means of this self-adjustment, the parking lock can be mounted in the operating position nP, since tolerance compensation is also possible when the parking lock pawl is actuated.
The concept of the invention can be applied to a support element which is directly or indirectly supported on the parking lock housing, so that the compensation can take place in the parking lock module. This makes the parking lock particularly easy to install and can be preassembled as a module. The module itself can later be mounted on the transmission without compensating for play.
Support of the support element is also provided, either directly or indirectly, by another component on the transmission housing. In the latter case, the parking lock housing is not required. Installation can be done at position P, as well as at position nP and any intermediate positions. Trial engagement of the parking lock device proves the applicability of the required tolerance setting during assembly, and may be omitted, thereby achieving a longer cycle time.
The support element can be designed as a raceway plate. Thus, on the one hand, it is particularly easy to manufacture and, on the other hand, it can be hardened and/or coated. As a steel insert, it provides a reliable force support even in the case where the parking lock or other parts of the transmission housing should be made of aluminum or plastic. The raceway plate can be easily made of a strip-shaped material by cutting it to a certain length, and can be accommodated on the parking lock housing by its edge.
For example, in order to accommodate the support element, an insertion seat is provided, such as an elongated hole, in which the support element is arranged with play. For this purpose, the support element may have its own receiving element, such as a lug, by means of which a guidance in the parking lock housing or the transmission housing is ensured.
The play provided according to the invention can be provided in two or even three degrees of freedom to achieve pivoting, tilting and pitching. The play is preferably only movable in one direction. In particular, provision is made for only play in the radial direction with respect to the parking lock wheel to be compensated for, and for there to be little play in the other directions.
The parking lock device has a parking lock housing. The parking lock housing does not need to surround the parking lock from several sides. Instead, it is sufficient for the parking lock housing to hold the support element. It may also assume other functions. For example, it may guide the actuating unit, store the locking pawl and/or accommodate a return spring of the locking pawl.
The locking pawl is a pawl which is movable about the pivot point and has at its end facing away from the pivot point a ratchet by means of which it can be locked in a form-fitting manner in a tooth profile arranged on the parking lock wheel. On the side facing radially away from the ratchet teeth from the parking lock wheel, the locking pawl has a pawl back having a pawl profile which is acted upon by the actuating unit when the parking lock is engaged. The detent profile may form a narrow profile, i.e. it is designed as a set of profile peaks. In one variation, the detent profile is a flat surface.
An externally introduced force for actuating the parking lock is transmitted to the locking pawl via the actuating unit. Thus, the actuation unit preferably moves linearly in one direction; generally, this direction is substantially parallel to the direction of the locking pawl in the engaged state. This results in a particularly compact parking lock.
In most cases, the actuating unit is spring-loaded, so that the parking lock can be automatically triggered in the event of an electrical fault. Typically, the actuation unit has a carriage holding one or more rollers. They roll off the pawl profile with little friction when engaging or disengaging the parking lock. In the case of a plurality of rollers, the rollers may be arranged in such a way that they roll away from each other when they move. For this purpose, they may be arranged radially one above the other.
The actuating unit is supported on the one hand on the pawl contour and on the other hand by the support element. Preferably, the actuation unit is always supported thereon in the engaged state (P) and the disengaged state (nP). In another embodiment, provision is made for the actuation unit to be supported in different positions on the support element in the engaged state (P) and in the disengaged state (nP). For this reason, when it is actuated, it can roll or slide on the support element, depending on the installation. The support element is arranged with play to ensure that the actuating unit contacts the support element in every state. In another embodiment, the support element is spring loaded such that it is still connected to the parking lock housing or transmission housing to have play, but always in a defined position.
The support element is radially movable. It may also have play in the direction of rotation or tilt.
The support element may have a plurality of lugs by which it is held in a complementary lug insertion seat. The lug insertion seat and the lug may be the same as or different from each other.
The vehicle may be a motor vehicle. The vehicle may be a hybrid vehicle or an electric vehicle. The vehicle may have a driveline with a transmission. The transmission may be mounted in "E-Axle". The transmission may be a dedicated hybrid transmission. The transmission may be an automatic transmission.
The parking lock may limit or prevent the vehicle from moving from the park position. For example, a vehicle on a slope may be prevented from moving. The parking lock may be connected to the transmission. The parking lock may be arranged in the transmission. The parking lock may be connected to a transmission housing of the transmission. The parking lock may be connected (e.g., screwed) to the transmission housing at least by the parking lock housing.
The parking lock may be actuated by an actuator. The actuator may have a motor, in particular a servomotor.
In a special embodiment of the invention, the parking lock housing has a first housing wall with a first lug, and the support element has a first recess, wherein the first lug is accommodated in the first recess. Starting from the first housing wall, a first lug can project in a direction parallel to the first direction. In an advantageous embodiment of the invention, the material thickness of the first lug is smaller than the groove height of the first groove. Instead, the support element may also be provided with lugs and the housing wall with grooves.
In a preferred embodiment of the invention, the parking lock housing has a second housing wall. The two housing walls can be fixed to one another by at least one spacer and enclose the support element.
Further advantages and advantageous embodiments of the invention result from the description of the figures and the drawing.
Drawings
The present invention is described in detail below with reference to the accompanying drawings. Specifically, the method comprises the following steps:
figure 1 shows a three-dimensional view of a parking lock device in a first embodiment of the invention,
figure 2 shows a three-dimensional view of the parking lock of figure 1 from the opposite side,
FIG. 3 shows a three-dimensional view of a cross section of the parking lock of FIG. 1, an
Fig. 4 shows a three-dimensional view of the parking lock device in a second embodiment of the invention.
Detailed Description
Fig. 1 shows a parking lock 10 with a locking pawl 12, which locking pawl 12 can be rotated about an axis of rotation 14. When the locking pawl 12 is rotated, the ratchet teeth 16 integral therewith move substantially in a radial direction 19 relative to the main drive shaft (not shown). The parking lock 10 is intended to be installed in a vehicle transmission of a motor vehicle and to fix a parking lock wheel (not shown) which is connected to a main drive shaft in a rotationally fixed manner. For this purpose, the parking lock wheel has a locking tooth system arranged on its outer circumference, in which locking tooth system the ratchet 16 can be locked in a form-fitting manner.
The locking pawl 12 is held by a return spring 28, which return spring 28 prevents the locking pawl from being inadvertently locked on the parking lock wheel in the unloaded state due to gravity.
The parking lock 10 also has a first housing wall 20 and a second housing wall 22, which are arranged as plate parts parallel to one another. The two housing walls 20, 22 are separated from one another by a plurality of spacer sleeves 32, in this case two spacer sleeves 32. Being a hollow cylinder, the spacer sleeve 32 simultaneously enables the parking lock 10 to be fixed to a transmission (not shown) by means of the screw 30 and thus has a dual function. The two spacer sleeves 32 form together with the shaft 15 supporting the locking pawl 12 a substantially right-angled triangle. For this purpose, one of the spacer sleeves 32 is arranged on the front side of the front face of the locking pawl 12. The parking lock 10 is thus compact and firmly supported.
The shaft 15 is connected to the two housing walls 20, 22 by a spacer member 33. The integral spacer part 33 also separates the two housing halves 20, 22 and also forms a guide sleeve for the actuating element 24 (fig. 3).
As can be seen from fig. 3, the actuating element 24 can be moved linearly in an axial direction 26, the axial direction 26 being substantially tangential to the parking lock wheel. The actuating element 24 can be moved by the actuator in an axial direction 26 extending perpendicular to the axis of rotation 14 and perpendicular to the radial direction 19.
Furthermore, the parking lock 10 comprises a support element 18, which support element 18 is accommodated by a first housing wall 20 and a second housing wall 22. The locking pawl 12 is designated as a pawl contour 44 as a contact surface and the support element 18 is designated as a counter-contact surface 42 as a contact surface, which is opposite to the contact surface with respect to the radial direction 19. The support element 18 is designed as a raceway plate and has four lugs 34, 38. Before the parking lock is installed as a module, one of the housing walls engages into the lug receptacles 36, 38, which are designed as slots. In this way, it can be inserted from above on the housing walls 20, 22 or rotated by 90 °. As a safeguard against loss, the lugs 24, 28 projecting through the support element 18 can easily "flare out" so that the raceway plates do not fall out. The height of the lug insertion seats 36, 38 corresponds at least to the thickness of the plate plus the tolerance to be compensated. The support element is guided axially with little play in the two housing walls 20, 22 designed as side plates. The parking lock produced in this way can be fixed as a module by means of two screws 30 in the transmission housing. As a result of the manufacturing process, dimensional float occurs between the centering hole in the housing and the contact surface of the support element 18, which dimensional float can be compensated for in the parking lock as a result of being arranged with play.
Fig. 2 shows a three-dimensional view of the parking lock 10 of fig. 1, viewed from the opposite side. The parking lock 10 may be connected to the transmission housing by a screw 30. The second housing wall 22 is fixed at a distance from the first housing wall 20 by means of a spacer sleeve 32. The support element 18 has a second lug 38 which is received in a second recess 40 in the second housing wall 22 so as to be movable to a limited extent relative to the radial direction 19. The lugs 34, 38 project in a direction 35 perpendicular to the first direction 19.
Fig. 3 shows an actuating unit 24 arranged between the counter-contact surface 42 of the support element 18 and the pawl profile 44 of the locking pawl 12, which contains a first rolling element 46 and a second rolling element 48 which are rotatable.
The first rolling element 46 and the second rolling element 48 are in contact with each other to transmit a supporting force 50 introduced by the locking pawl 12 and oriented in the first direction 19. The first rolling element 46 is in contact with the pawl profile 44 for transmitting the supporting force, while the second rolling element 48 is in contact with the counter contact surface 42 for transmitting the supporting force. A first rolling element 46 and a second rolling element 48 are arranged in series between the pawl profile 44 and the counter contact surface 42 for transmitting a supporting force 50.
The actuating unit 24 can be moved axially in an axial direction 26 extending perpendicularly to the axis of rotation 14 against the restoring force of the second spring element 52. If the actuating unit 24 is in a left position with respect to the axial direction 26, the locking pawl 12 is in a release position (P), in which the locking pawl 12 is moved by the first spring element 28 with respect to the first direction 19 towards the support element 18.
If the actuating unit 24 is moved to the right from the left position, the locking pawl 12 is moved into a blocking position in which the ratchet 16 is pushed away from the support element 18 relative to the first direction 19 by the first rolling element 46 and the second rolling element 48. When the actuation unit 24 is moved in the axial direction 26, the first rolling element 46 and the second rolling element 48 rotate and in this way roll on the contact surface 44 or the counter-contact surface 42. In this blocking position, the parking lock 10 is locked.
In the alternative parking lock 10 according to fig. 4, the locking pawl 12 is in the locking position, in which the ratchet 16 is positively connected to the parking lock wheel 56.
The actuating unit 24, which is movable in the axial direction 26, transmits the supporting force introduced by the locking pawl 12 to the supporting element 18, which supporting element 18 in turn supports the supporting force on the counter bracket which is assigned to the transmission housing.
The first housing wall 20 limits the movement of the support element 18 in the direction of the locking pawl 12. For this purpose, a projection 53 in the actuating element 24, which is designed as a slider, engages in an extended bore 54 arranged in the first housing wall 20. Here, the movement of the support element 18 in the opposite direction is not restricted, but can be achieved in that the first lug 34 at the outer end is curved, while there is a movement clearance of the support element 18 in the first direction 19 relative to the first holding element 20, and thus the support element 18 is fixed on the first holding element 20.
Description of the reference numerals
10 parking lock device
12 locking pawl
14 axis of rotation
15 shaft
16 ratchet teeth
18 support element
19 radial direction
20 first housing wall
21 parking lock casing
22 second housing wall
24 actuating unit
26 axial direction
28 return spring
30 screw
32 space sleeve
33 spacer member
34 first lug
36 first lug inserting seat
38 second lug
40 second lug insert seat
42 reverse contact surface
44 pawl profile
46 first roller
48 second roller
50 holding power
56 parking lock wheel.
Claims (9)
1. A parking lock (10) has
A parking lock housing (21),
a locking pawl (12) having a ratchet (16) which can be locked in the parking lock wheel (56) and a pawl contour (44) which is arranged on the rear side of the ratchet (16),
an actuating unit (24) which, when the parking lock (10) is engaged, acts on the pawl contour (44) and rotates the locking pawl (12) relative to the parking lock housing (21) about an axis of rotation (14),
a support element (18) on which the actuation unit (24) is supported in the engaged state (P),
it is characterized in that the preparation method is characterized in that,
the support element (18) is connected to the parking lock housing (21) with play, the support element (18) being connected to the parking lock housing (21) by a plurality of lugs (34) arranged in lug insertion seats (36).
2. Parking lock according to claim 1, characterized in that the support element (18) is designed as a raceway plate.
3. Parking lock according to claim 1, characterized in that the support element (18) is angled in the direction of movement of the actuation unit (24).
4. Parking lock according to any of the preceding claims 1-3, characterized in that the support element (18) is connected to the parking lock housing (21) with little axial play but radial play.
5. Parking lock according to any of the preceding claims 1 to 3, characterized in that the actuating unit (24) is designed as a slider with two rollers (46, 48) which roll on the pawl profile (44) or the support element (18).
6. Parking lock according to any of the preceding claims 1 to 3, characterized in that the parking lock housing (21) has an extended bore (54) in which the actuating unit (24) can be guided positively.
7. Parking lock according to any of the preceding claims 1 to 3, characterized in that the parking lock housing (21) has two housing walls (20, 22) which form with the support element (18) a U-shaped profile which laterally frames the actuating unit (24) and the locking pawl (12) and which are separated from one another by a spacer (32) and can be screwed to a transmission through the spacer.
8. Transmission with a transmission housing and a parking lock according to any of the preceding claims, wherein the transmission housing replaces the parking lock housing and the support element (18) is connected to the transmission housing to have play.
9. Method for assembling a parking lock (10) according to one of the preceding claims 1 to 7 on a vehicle transmission housing, characterized in that a parking lock housing (21) with the locking pawl (12) and the support element (18) is first preassembled to form a structural unit, which is then fixed to the transmission housing.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018129317.8 | 2018-11-21 | ||
| DE102018129317 | 2018-11-21 | ||
| DE102018130077 | 2018-11-28 | ||
| DE102018130077.8 | 2018-11-28 | ||
| DE202018006325.8 | 2018-12-07 | ||
| DE202018006325.8U DE202018006325U1 (en) | 2018-11-21 | 2018-12-07 | Parking lock device with a counter-moving element connected to a limited extent |
| PCT/DE2019/100999 WO2020103981A1 (en) | 2018-11-21 | 2019-11-21 | Parking lock and method for the assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112912649A CN112912649A (en) | 2021-06-04 |
| CN112912649B true CN112912649B (en) | 2022-08-09 |
Family
ID=76111295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980070175.0A Active CN112912649B (en) | 2018-11-21 | 2019-11-21 | Parking lock device and method of assembling the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112912649B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10144063A1 (en) * | 2001-09-07 | 2003-03-27 | Ina Schaeffler Kg | Parking lock for automatic gear has locking ring with pawl fitting into holes, selector lever, rollers on end of rods system, guide-plate with horizontal wall and side wall |
| CN103930319A (en) * | 2011-08-05 | 2014-07-16 | 舍弗勒技术有限两合公司 | Parking lock |
| DE102017127358A1 (en) * | 2016-11-25 | 2018-05-30 | Schaeffler Technologies AG & Co. KG | Parking lock for a motor vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2410214B1 (en) * | 2010-07-23 | 2013-09-04 | Magna Powertrain AG & Co. KG | Blocking mechanism |
-
2019
- 2019-11-21 CN CN201980070175.0A patent/CN112912649B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10144063A1 (en) * | 2001-09-07 | 2003-03-27 | Ina Schaeffler Kg | Parking lock for automatic gear has locking ring with pawl fitting into holes, selector lever, rollers on end of rods system, guide-plate with horizontal wall and side wall |
| CN103930319A (en) * | 2011-08-05 | 2014-07-16 | 舍弗勒技术有限两合公司 | Parking lock |
| DE102017127358A1 (en) * | 2016-11-25 | 2018-05-30 | Schaeffler Technologies AG & Co. KG | Parking lock for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112912649A (en) | 2021-06-04 |
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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 |
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