CN109139906B - Parking mechanism and car - Google Patents
Parking mechanism and car Download PDFInfo
- Publication number
- CN109139906B CN109139906B CN201811286108.6A CN201811286108A CN109139906B CN 109139906 B CN109139906 B CN 109139906B CN 201811286108 A CN201811286108 A CN 201811286108A CN 109139906 B CN109139906 B CN 109139906B
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- pawl
- hole
- limiting
- connecting rod
- rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 51
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 210000003781 tooth socket Anatomy 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
Abstract
The invention discloses a parking mechanism and an automobile, and belongs to the technical field of automobile parts. This parking mechanism includes: the power source, the pawl, the ratchet wheel, the driving rod and the elastic element; a first through hole is formed in the center of the pawl along the axial direction, one end of the driving rod, which penetrates through the first through hole, is connected with the power source, and the other end of the driving rod is connected with the transmission shell; the driving rod comprises a first connecting rod and a second connecting rod which are connected in sequence, the first connecting rod is connected with the power source, and the second connecting rod is connected with the transmission shell; the elastic element is sleeved on the second connecting rod, one end of the elastic element is abutted against the pawl, and the other end of the elastic element is abutted against the transmission shell; the ratchet wheel is provided with a tooth groove meshed with the pawl; be provided with position sensor on the power supply, position sensor and pawl electric connection. According to the invention, the pawl moves along the axial direction of the ratchet wheel, gear engagement is realized, the pawl with a longer length is avoided being adopted when the pawl moves along the radial direction of the ratchet wheel, the structure of the parking mechanism is simplified, and the spatial arrangement of the parking mechanism is simplified.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a parking mechanism and an automobile.
Background
The parking mechanism is a safety device for preventing the vehicle from sliding in the automobile transmission, and is an indispensable key mechanism in the transmission for enabling the automobile to be parked at a certain position even on a slope reliably without time limitation. The parking mechanism can realize safe parking of the automobile at a certain speed, and after the automobile is parked, any abnormal condition occurs, the parking mechanism cannot automatically shift, and when the automobile needs to run, the parking mechanism can smoothly shift the automobile.
The parking mechanism adopted by the related art includes: the ratchet wheel is positioned on the rotating shaft, one end of the driving rod is connected with the power source, the other end of the driving rod is connected with the pawl, and the ratchet wheel adopts one-way gear teeth, so that the ratchet wheel can only move along the radial direction of the rotating shaft. The pawl is contacted with the one-way gear teeth of the ratchet wheel, and the power is provided by the power source, so that the driving rod drives the pawl to rotate along the rotating shaft and to radially displace relative to the ratchet wheel. When the driving rod rotates along the radial direction of the ratchet wheel in the anticlockwise direction, the pawl is inserted into the teeth of the ratchet wheel, and the ratchet wheel stops rotating, so that the automobile is put into gear; when the driving rod rotates clockwise along the radial direction of the ratchet wheel, the pawl slides on the one-way gear teeth of the ratchet wheel, and the automobile is shifted.
The inventors found that the related art has at least the following technical problems:
the actuating lever drives the pawl and rotates around the gyration axle center after receiving the power of power supply, and the pawl of this kind of condition all generally needs certain gyration length, consequently need reserve great space in the derailleur and dodge the rotary motion of pawl, leads to parking mechanism to occupy the derailleur space big, makes and has the limitation in the gearbox box design.
Disclosure of Invention
The embodiment of the invention provides a parking mechanism and an automobile, and can solve the technical problems. The specific technical scheme is as follows:
in one aspect, an embodiment of the present invention provides a parking mechanism, including: the power source, the pawl, the ratchet wheel and the driving rod;
the driving rod comprises a first connecting rod and a second connecting rod which are connected in sequence;
the first connecting rod is connected with the power source, a first through hole is formed in the center of the pawl along the axial direction, the pawl is sleeved at one end of the second connecting rod through the first through hole and is fixed with the second connecting rod, and the other end of the second connecting rod is in sliding connection with a connecting cylinder arranged on the transmission shell;
the pawl and the ratchet wheel are arranged in parallel relatively, and a tooth socket matched with teeth of the pawl is arranged on the ratchet wheel;
and a position sensor is arranged on the power source and electrically connected with the pawl.
Optionally, the parking mechanism further includes an elastic element, the elastic element is sleeved on the second connecting rod, one end of the elastic element abuts against the pawl, and the other end of the elastic element abuts against the connecting cylinder on the transmission housing.
Optionally, a second through hole is radially formed in the outer wall of the pawl, and a third through hole matched with the second through hole is formed in one end, connected with the first connecting rod, of the second connecting rod;
pins are arranged in the second through hole and the third through hole;
the second connecting rod is connected with the pawl through the pin.
Optionally, the parking mechanism further comprises a limiting bracket;
the limiting bracket is provided with a first limiting hole and a second limiting hole, the first limiting hole is opposite to the position before the pawl and the ratchet wheel are meshed, the second limiting hole is opposite to the position after the pawl and the ratchet wheel are meshed, and the pawl is positioned between the first limiting hole and the second limiting hole on the limiting bracket and is in sliding connection with the limiting bracket;
the first limiting hole is internally provided with a first limiting part, the second limiting hole is internally provided with a second limiting part, and the limiting support is detachably connected with the transmission shell through the first limiting part and the second limiting part.
Optionally, a U-shaped groove is formed in the limiting support, the U-shaped groove is located between the first limiting member and the second limiting member, and the tooth corresponding to the pawl is slidably connected to the U-shaped groove.
Optionally, a sliding rod is arranged on the limiting support, the sliding rod is located between the first limiting part and the second limiting part, and the pawl is connected with the sliding rod in a sliding manner.
Optionally, the second connecting rod comprises a first annular rod and a second annular rod which are integrally connected in sequence, and the diameter of the first annular rod is smaller than that of the second annular rod;
the first connecting rod is provided with a connecting hole matched with the first annular rod, the aperture of the connecting hole is larger than the diameter of the first annular rod, and the first annular rod is sleeved in the connecting hole;
the third through hole is formed in the second annular rod, and the elastic element is sleeved on the second annular rod.
Optionally, the power source is rigidly connected to the first connecting rod.
Optionally, the pawl has a plurality of teeth, and the ratchet wheel has a plurality of tooth spaces matching the teeth.
On the other hand, the embodiment of the invention also provides an automobile which comprises the parking mechanism.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the pawl moves along the axial direction of the ratchet wheel, gear engagement is realized, the pawl with a longer rotation length is prevented from being adopted when the pawl moves along the radial direction of the ratchet wheel, the length of the pawl is simplified, the spatial arrangement of the parking mechanism is simplified, and the occupied space of the parking mechanism in a transmission shell is further reduced; meanwhile, the components are compounded in a synergistic manner, so that the overall utilization efficiency of the vehicle body is improved, and the production cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a parking mechanism provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a parking mechanism provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the parking mechanism according to the embodiment of the present invention when the parking mechanism is not in gear;
FIG. 4 is a schematic structural diagram of the parking mechanism according to the embodiment of the present invention when in gear;
FIG. 5 is a side schematic view of a parking mechanism provided by an embodiment of the present invention;
fig. 6 is a schematic view of an assembling structure of the parking mechanism according to the embodiment of the present invention.
The reference numerals denote:
1-power source, 2-pawl, 21-second through hole,
3-ratchet wheel, 4-driving rod, 41-first connecting rod, 42-second connecting rod, 43-third through hole,
5-elastic element, 6-transmission shell, 7-pin and 8-limit bracket.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In one aspect, an embodiment of the present invention provides a parking mechanism, as shown in fig. 1 and 2, including: power source 1, pawl 2, ratchet 3 and actuating lever 4.
The drive lever 4 includes a first connecting rod 41 and a second connecting rod 42 connected in series.
The first connecting rod 41 is connected with the power source 1, a first through hole is formed in the center of the pawl 2 along the axial direction, the pawl 2 is sleeved at one end of the second connecting rod 42 through the first through hole and is fixed with the second connecting rod 42, and the other end of the second connecting rod 42 is connected with the connecting cylinder arranged on the transmission shell 6 in a sliding mode.
The pawl 2 and the ratchet wheel 3 are arranged in parallel relatively, and the ratchet wheel 3 is provided with a tooth socket matched with teeth on the pawl 2.
The power source 1 is provided with a position sensor which is electrically connected with the pawl 2.
As shown in fig. 1, in the parking mechanism provided by the embodiment of the invention, in the gear shifting process, the power source 1 drives the first connecting rod 41, the pawl 2 and the second connecting rod 42 to axially move in the direction toward the ratchet wheel 3, and the second connecting rod 42 is in sliding connection with the connecting cylinder on the transmission housing 6, so that the second connecting rod 42 can extend into the connecting cylinder until the pawl 2 reaches the position meshed with the tooth socket of the ratchet wheel 3; the position sensor senses the position information of the pawl 2, and when teeth on the pawl 2 are positioned in tooth grooves of the ratchet wheel 3 and are meshed with the tooth grooves, gear engagement is completed; when the automobile is unlocked, the power source 1 controls the first connecting rod 41, the pawl 2 and the second connecting rod 42 to axially move along the direction far away from the ratchet wheel 3 and return to the original position, and teeth on the pawl 2 are far away from the groove on the ratchet wheel 3, so that gear picking is realized.
The device provided by the embodiment of the invention at least has the following technical effects:
according to the parking mechanism provided by the embodiment of the invention, the pawl 2 is arranged to move axially along the ratchet wheel 3, so that teeth on the pawl 2 are meshed with tooth grooves of the ratchet wheel 3, gear engagement is realized, the pawl 2 with a longer length is avoided being adopted when the pawl 2 moves radially along the ratchet wheel 3, the length of the pawl 2 is simplified, the spatial arrangement of the parking mechanism is simplified, and the occupied space of the parking mechanism in the transmission shell 6 is further reduced; meanwhile, by means of synergistic compounding of the components, the overall utilization efficiency of the vehicle body is improved, and the production cost is reduced.
Optionally, the power source 1 can be a hydraulic cylinder, the driving rod 4 is pushed and stretched through the reciprocating motion of the hydraulic cylinder, the occupied area of the parking mechanism can be reduced by adopting the hydraulic cylinder, and the space utilization efficiency of the transmission is improved.
Through set up first through-hole on pawl 2 to cup joint pawl 2 on second connecting rod 42 through first through-hole, and fixed with second connecting rod 42, make pawl 2 not take place the skew when 3 axial motion to the ratchet, guarantee the stability and the security of putting into gear.
The pawl 2 and the second connecting rod 42 can be detachably connected, such as threaded connection, and can be internal threads arranged in the first through hole of the pawl 2 and external threads arranged on the second connecting rod 42; or may be an external thread provided in the first through hole and an internal thread provided in the second connecting rod 42.
It can be understood that the depth of the connecting cylinder arranged on the transmission housing 6 can be calculated in advance according to the specific required distance when the pawl 2 is meshed with the ratchet wheel 3, and when the pawl 2 is meshed with the ratchet wheel 3, the other end of the second connecting rod 42 is just propped against the bottom of the connecting cylinder, so that the limiting of the pawl 2 is further realized. The second connecting rod 42 is slidably connected with the connecting cylinder, for example, the diameter of the second connecting rod 42 is smaller than the inner diameter of the connecting cylinder, and the second connecting rod 42 is sleeved in the connecting cylinder; the diameter of the second connecting rod 42 may be larger than the inner diameter of the connecting cylinder, and the second connecting rod 42 is sleeved on the connecting cylinder. The connecting cylinder may be a cylindrical cylinder provided on the transmission case 6, and the connecting cylinder and the transmission case 6 may be integrally connected, for example, the connecting cylinder with a designed depth is welded to the transmission case 6, or detachably connected, for example, the connecting cylinder with a designed depth is screwed to the transmission case 6.
Optionally, as shown in fig. 2, fig. 3, fig. 4, and fig. 6, the parking mechanism further includes an elastic element 5, the elastic element 5 is sleeved on the second connecting rod 42, one end of the elastic element 5 abuts against the pawl 2, and the other end of the elastic element abuts against a connecting cylinder on the transmission housing 6.
Optionally, the elastic element 5 may be a leaf spring, a coil spring, a torsion bar spring, a rubber spring, and the like, and when the elastic element 5 is the leaf spring, the leaf spring may be an annular leaf spring with a through hole in the middle, and the diameter of the annular leaf spring is greater than that of the first through hole, and the annular leaf spring passes through the second connecting rod 42 and abuts against the pawl 2. When the elastic element 5 is a coil spring, the coil spring is sleeved on the second connecting rod 42, and the diameter of the coil spring is larger than that of the first through hole, so as to abut against the pawl 2. When the elastic member 5 is a rubber spring, it may be a rubber spring bonded to the second connecting rod 42.
Optionally, when the power source 1 is a hydraulic cylinder, the position sensor is integrated on the hydraulic cylinder, and the position sensor senses a position signal of the pawl 2 to control the axial movement distance of the pawl 2 to the ratchet 3.
Alternatively, as shown in fig. 2, the outer wall of the pawl 2 has a second through hole 21 along the radial direction, and the end of the second connecting rod 42 connected to the first connecting rod 41 has a third through hole 43 adapted to the second through hole 21.
The second connecting rod 42 is connected to the pawl 2 by a pin 7.
The outer wall of the pawl 2 is provided with a second through hole 21 along the radial direction, the second connecting rod 42 is provided with a third through hole 43 matched with the second through hole 21, so that the pin 7 can penetrate through the second through hole 21 and the third through hole 43 to connect the second connecting rod 42 with the pawl 2, the pawl 2 is not separated from the second connecting rod 42, and the stability of the pawl 2 is kept. By connecting the pawl 2 with the second connecting rod 42 by means of the pin 7 it is ensured that the power source 1 pushes the pawl 2 axially in the direction towards the ratchet wheel 3 without deflection when engaging gear.
The pin 7 may be an elastic pin having a certain elastic force. It will be appreciated that the diameter of the pin 7 is sized to fit the diameter of the second and third bores 21, 43. That is, the diameter of the pin 7 is not larger than the diameters of the second through hole 21 and the third through hole 43, so that the pin 7 can pass through the second through hole 21 and the third through hole 43 to realize the connection of the pawl 2 and the second connecting rod 42.
The second through hole 21 and the third through hole 43 may be cylindrical through holes, or may also be irregular through holes such as square and triangle, for example, when the second through hole 21 and the third through hole 43 are cylindrical through holes, the pin 7 is a cylindrical pin 7, and the diameter of the pin is smaller than that of the cylindrical through hole; when the second through hole 21 and the third through hole 43 are irregularly-shaped through holes, the pin 7 may be a cylindrical pin 7, or may be an irregularly-shaped pin 7, as long as the diameter of the pin 7 is smaller than the size of the irregularly-shaped through hole, and the pin can extend into the irregularly-shaped through hole.
Optionally, the number of the pins 7 may be multiple, for example, 2, 3, 4, 5, 6, 7, etc. It is understood that when there are a plurality of pins 7, there may be a plurality of matching second through holes 21 and third through holes 43, and as an example, when there are 3 pins 7, there are 3 second through holes 21 and third through holes 43. It should be understood that, when there are a plurality of pins 7, second through holes 21 and third through holes 43, the sizes of the other groups may be different from the size of the previous group as long as the sizes of the group of the second through holes 21 and third through holes 43 corresponding to the pins 7 are matched.
Optionally, as shown in fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the parking mechanism further includes a limit bracket 8;
the limiting bracket 8 is provided with a first limiting hole and a second limiting hole, the first limiting hole is opposite to the position before the pawl 2 and the ratchet wheel 3 are meshed, the second limiting hole is opposite to the position after the pawl 2 and the ratchet wheel 3 are meshed, and the pawl 2 is positioned between the first limiting hole and the second limiting hole on the limiting bracket 8 and is connected with the limiting bracket 8 in a sliding manner;
the first limiting hole is internally provided with a first limiting part, the second limiting hole is internally provided with a second limiting part, and the limiting support 8 is detachably connected with the transmission shell 6 through the first limiting part and the second limiting part.
The limiting support 8 is provided with a first limiting hole and a second limiting hole, the first limiting hole is opposite to the position before the pawl 2 and the ratchet wheel 3 are meshed, and the second limiting hole is opposite to the position after the pawl 2 and the ratchet wheel 3 are meshed. The pawl 2 is positioned between the first limit hole and the second limit hole on the limit bracket 8 and is connected with the limit bracket 8 in a sliding way.
The first limiting hole is internally provided with a first limiting part, the second limiting hole is internally provided with a second limiting part, and the limiting support 8 is detachably connected with the transmission shell 6 through the first limiting part and the second limiting part.
The limiting support 8 and the transmission housing 6 are detachably connected through a first limiting part and a second limiting part, for example, the first limiting hole and the second limiting hole may be bolt holes, the first limiting part and the second limiting part may be bolts, and the limiting support 8 is connected with the transmission housing 6 through bolts. It can be understood that, when the first position-limiting member is a bolt, the aperture of the first position-limiting hole is adapted to the diameter of the bolt connected thereto, and when the second position-limiting member is a bolt, the aperture of the second position-limiting hole should also be adapted to the diameter of the bolt connected thereto.
Optionally, a slide way is provided on the limiting support 8, the slide way is located between the first limiting part and the second limiting part, and the pawl 2 is slidably connected with the limiting support 8 through the slide way.
The limiting support 8 can be a limiting block of a cuboid, a first limiting hole and a second limiting hole are formed in two ends of the limiting block, the first limiting part and the second limiting part penetrate through the first limiting hole and the second limiting hole to be connected with the transmission shell 6, and therefore limiting of the pawl 2 is achieved through the first limiting part and the second limiting part. Or a slide way is arranged on the limiting block, and the pawl 2 is positioned in the slide way and is connected with the limiting bracket 8 in a sliding way.
For example, one of the claws of the pawl 2 may be located in the slide way and slidably connected to the slide way, when the gear is engaged, the pawl 2 moves to one end of the second limiting member in the slide way and is engaged with the tooth groove of the ratchet 3, so as to achieve the gear engagement, and when the gear is removed, the pawl 2 moves to one end of the first limiting member in the slide way, so as to achieve the gear removal.
In order to reduce the friction between the pawl 2 and the slide way, the size of the slide way is matched with that of the claw of the pawl 2, and meanwhile, lubricating oil can be added into the slide way, so that the friction between the pawl 2 and the slide way is reduced, and further the abrasion between parts is reduced.
Optionally, a U-shaped groove is formed in the limiting support 8, the U-shaped groove is located between the first limiting member and the second limiting member, and the tooth corresponding to the pawl 2 abuts against and is slidably connected with the U-shaped groove.
The U-shaped groove is abutted against the tooth part of the pawl 2, so that the pawl 2 is limited to generate angular displacement around the center of the driving rod 4, smooth gear engagement is realized, and the radial position of the pawl 2 is opposite to that of the ratchet wheel 3 after gear disengagement.
Optionally, a sliding rod is arranged on the limiting support 8, the sliding rod is located between the first limiting part and the second limiting part, and the pawl 2 is slidably connected with the limiting support 8 through the sliding rod.
The pawl 2 is slidably connected with the sliding rod, for example, a hole is formed in the pawl 2, the sliding rod penetrates through the hole, the pawl 2 is connected with the sliding rod, or a sliding groove matched with the sliding rod is formed in the pawl 2, the sliding rod is located in the sliding groove, and the pawl 2 slides along the sliding rod. Considering that the pawl 2 can generate corresponding friction when sliding along the sliding rod, the size of the sliding groove formed in the pawl 2 is matched with that of the sliding rod, so that the pawl 2 does not separate from the sliding rod when moving, and the friction is reduced as much as possible. It is also possible to wipe the pawl 2 with lubricating oil, reducing the friction between the parts.
It will be appreciated that the longitudinal distance between the tooth spaces of the pawl 2 and the ratchet wheel 3 should be maintained constant when connecting the pawl 2 to the spacing bracket 8, without affecting the engagement between the tooth spaces of the pawl 2 and the ratchet wheel 3.
It can be understood that the limiting support 8 can further ensure that the pawl 2 can be accurately meshed with a tooth groove of the ratchet wheel 3 when moving towards the ratchet wheel 3 while fixing the pawl 2, and the safety and the stability of the operation of the parking mechanism are ensured through the cooperation of the limiting support 8 and the position sensor.
Alternatively, the second connecting rod 42 includes a first annular rod and a second annular rod integrally connected in sequence, and the diameter of the first annular rod is smaller than that of the second annular rod.
The first connecting rod 41 is provided with a connecting hole matched with the first annular rod, the aperture of the connecting hole is larger than the diameter of the first annular rod, and the first annular rod is sleeved in the connecting hole.
The third through hole 43 is located on the second annular rod, and the elastic element 5 is sleeved on the second annular rod.
The first connecting rod 41 and the first annular rod may be detachably connected, and may be, for example, an internal thread formed in the connecting hole, and an external thread formed on the first annular rod, and the internal thread is connected with the external thread; or an external thread is arranged in the connecting hole, an internal thread is arranged on the first annular rod, and the internal thread is connected with the external thread.
The elastic element 5 is sleeved on the second annular rod, and the third through hole 43 is positioned on the second annular rod and is communicated with the second through hole 21 formed in the outer wall of the pawl 2 along the radial direction. The outer diameter of the second annular rod is smaller than the inner diameter of the elastic element 5, so that the elastic element 5 is conveniently sleeved on the second annular rod.
Alternatively, the power source 1 is rigidly connected to the first connecting rod 41.
In an example, the power source 1 and the first connecting rod 41 are welded, or integrally connected in a stamping manner, and the stamping processing manner is adopted, so that the processing manner of parts of the parking mechanism is improved, the parts of the automobile are simplified, and the spatial arrangement and the light-weight design of the parking mechanism are facilitated.
Alternatively, as shown in fig. 5 and 6, the pawl 2 has a plurality of teeth, and the ratchet wheel 3 has a plurality of tooth spaces corresponding to the plurality of teeth.
Under the same parking condition, the multi-tooth matching structure can reduce the bearing torque of a single tooth compared with the single-tooth matching, so that the sizes of the ratchet wheel 3 and the pawl 2 are reasonably reduced, the parts of the parking mechanism provided by the embodiment of the invention are simplified in size, the space arrangement and the light weight are facilitated, the part processing mode is improved, for example, a casting is changed into a stamping part, and the cost is also reduced. The teeth of the pawl 2 described above are referred to in the embodiments of the present invention. For example, the number of teeth on the pawl 2 may be 2, 3, 4, etc., and when there are a plurality of teeth on the pawl 2, the ratchet wheel 3 is provided with a tooth socket adapted to the teeth on the pawl 2.
The embodiment of the invention also provides an automobile which comprises any one of the parking mechanisms mentioned above.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A parking mechanism, characterized by comprising: the power source (1), the pawl (2), the ratchet wheel (3) and the driving rod (4);
the driving rod (4) comprises a first connecting rod (41) and a second connecting rod (42) which are connected in sequence;
the first connecting rod (41) is connected with the power source (1), a first through hole is formed in the center of the pawl (2) along the axial direction, the pawl (2) is sleeved at one end of the second connecting rod (42) through the first through hole and is fixed with the second connecting rod (42), and the other end of the second connecting rod (42) is in sliding connection with a connecting cylinder on the transmission shell (6);
the pawl (2) is arranged in parallel relative to the ratchet wheel (3), the ratchet wheel (3) is provided with a tooth socket matched with teeth of the pawl (2), and the pawl (2) is configured to move axially along the ratchet wheel (3) so as to enable the pawl (2) to be meshed with the ratchet wheel (3) or separated from the ratchet wheel (3);
a position sensor is arranged on the power source (1) and is electrically connected with the pawl (2);
the parking mechanism further comprises a limiting bracket (8);
a first limiting hole and a second limiting hole are formed in the limiting support (8), the first limiting hole is opposite to the position of the pawl (2) before meshing with the ratchet wheel (3), the second limiting hole is opposite to the position of the pawl (2) after meshing with the ratchet wheel (3), and the pawl (2) is located between the first limiting hole and the second limiting hole in the limiting support (8) and is in sliding connection with the limiting support (8);
the first limiting hole is internally provided with a first limiting part, the second limiting hole is internally provided with a second limiting part, and the limiting support (8) is detachably connected with the transmission shell (6) through the first limiting part and the second limiting part.
2. The parking mechanism according to claim 1, further comprising an elastic element (5), wherein the elastic element (5) is sleeved on the second connecting rod (42), one end of the elastic element (5) abuts against the pawl (2), and the other end of the elastic element abuts against the connecting cylinder on the transmission housing (6).
3. Parking mechanism according to claim 2, characterized in that the pawl (2) has a second through hole (21) in the radial direction on the outer wall, the end of the second connecting rod (42) connected to the first connecting rod (41) having a third through hole (43) adapted to the second through hole (21); pins (7) are arranged in the second through hole (21) and the third through hole (43); the second connecting rod (42) is connected with the pawl (2) through the pin (7).
4. The parking mechanism according to claim 1, wherein the limiting bracket (8) is provided with a U-shaped groove, the U-shaped groove is located between the first limiting member and the second limiting member, and the corresponding tooth of the pawl (2) is slidably connected with the U-shaped groove.
5. Parking mechanism according to claim 1, wherein a sliding rod is arranged on the limit bracket (8), the sliding rod is located between the first limit piece and the second limit piece, and the pawl (2) is connected with the sliding rod in a sliding manner.
6. Parking mechanism according to claim 3, characterized in that said second connecting rod (42) comprises a first annular rod and a second annular rod integrally connected in sequence, the diameter of said first annular rod being smaller than the diameter of said second annular rod; the first connecting rod (41) is provided with a connecting hole matched with the first annular rod, the aperture of the connecting hole is larger than the diameter of the first annular rod, and the first annular rod is sleeved in the connecting hole; the third through hole (43) is located on the second annular rod, and the elastic element (5) is sleeved on the second annular rod.
7. Parking mechanism according to claim 1, characterized in that the power source (1) is rigidly connected with the first connecting rod (41).
8. Parking mechanism according to any of claims 1-7, wherein said teeth on said pawl (2) are plural and said ratchet wheel (3) has a plurality of said teeth slots adapted to said plural teeth.
9. A vehicle, characterized in that it comprises a parking mechanism according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286108.6A CN109139906B (en) | 2018-10-31 | 2018-10-31 | Parking mechanism and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286108.6A CN109139906B (en) | 2018-10-31 | 2018-10-31 | Parking mechanism and car |
Publications (2)
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| DE102020121495B4 (en) * | 2020-08-17 | 2022-05-25 | Schaeffler Technologies AG & Co. KG | parking lock |
| DE102020121494A1 (en) * | 2020-08-17 | 2022-02-17 | Schaeffler Technologies AG & Co. KG | parking lock |
| CN112555407B (en) * | 2020-12-29 | 2022-06-10 | 南京朗禾智能控制研究院有限公司 | Vehicle parking mechanism |
| CN114610118A (en) * | 2022-03-21 | 2022-06-10 | 广东长盈精密技术有限公司 | Intelligent foldable electronic equipment |
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| CN102168755A (en) * | 2011-03-30 | 2011-08-31 | 李金东 | Electronic control P step mechanism for electric vehicle |
| DE102011006748A1 (en) * | 2011-04-05 | 2012-10-11 | Schaeffler Technologies Gmbh & Co. Kg | Drive unit for a vehicle with an electric motor and a method for operating such a drive unit |
| CN205101548U (en) * | 2015-11-04 | 2016-03-23 | 科力远混合动力技术有限公司 | Degree of depth hybrid gearbox parking mechanism |
| CN105333140B (en) * | 2015-11-26 | 2017-12-15 | 合肥工业大学 | A kind of automotive transmission parking locking mechanism |
| CN206918227U (en) * | 2017-03-22 | 2018-01-23 | 广州汽车集团股份有限公司 | A kind of parking motor and its anti-reverse mechanism |
| CN108468801B (en) * | 2018-03-21 | 2020-10-16 | 北京新能源汽车股份有限公司 | Parking mechanism |
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