CN202065461U - P-gear actuating mechanism of automotive transmission - Google Patents
P-gear actuating mechanism of automotive transmission Download PDFInfo
- Publication number
- CN202065461U CN202065461U CN 201120174470 CN201120174470U CN202065461U CN 202065461 U CN202065461 U CN 202065461U CN 201120174470 CN201120174470 CN 201120174470 CN 201120174470 U CN201120174470 U CN 201120174470U CN 202065461 U CN202065461 U CN 202065461U
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- Prior art keywords
- parking
- gear
- worm
- park pawl
- rack
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Abstract
The utility model discloses a P-gear actuating mechanism of an automotive transmission, which comprises a parking motor, a worm gear component, a rack component, a parking ratchet, a parking pawl and the like. The parking motor is arranged outside a transmission box, and the worm gear component, the rack component, the parking ratchet, the parking pawl and the like are arranged in the transmission box; the rack component comprises a rack shaft, a parking cam limiting sleeve, a parking cam and a parking spring; the worm wheel component comprises a worm gear arranged on a worm gear shaft and a gear, and one end of the worm gear shaft extends out of the transmission box and is connected with the P-gear sensor; the gear of the worm gear component is engaged with the rack part on the rack shaft of the rack component; the output end of the parking motor is connected with a worm, and the worm is engaged with the worm gear on the worm gear component; and the parking cam props against one end of the parking pawl, and ratchets at the other end of the parking pawl are correspondingly matched with tooth slots of the parking ratchet connected with the input shaft of the transmission in a matching way. The utility model has the beneficial effects that: the P-gear actuating mechanism has a simple and compact structure and good overall performance, and the automobile parking reliability is improved; and the P-gear actuating mechanism is easy to manufacture and control and the production cost is low.
Description
Technical field
The utility model relates to a kind of automotive transmission halting mechanism, and particularly a kind of being applicable to prevents the unexpected system for halting autocar that moves of automobile when stopping on the ramp.
Background technique
Automobile stop is on normal level road the time, and the driver only need pull on parking brake just can play braking action to car load; Yet, if automobile stop on steeper ramp the time, only depends on parking brake just can not work fully, the phenomenon that may occur moving.Common manual transmission can guarantee the unlikely slip of vehicle by hanging gear, but for automatic transmission or by motor-driven speed changer, just must take measures to prevent the generation of fortuitous event, so need halting mechanism to realize wheel braking.
Halting mechanism is a kind of safety installations that prevents that vehicle from sliding, and it acts on automotive transmission, and the transmission shaft of speed changer is locked, is anchored on certain position or even the slope with making the reliable and no time limit of automobile, and it also helps automobile to start to walk on sloping road.Therefore, halting mechanism is widely used in automatic transmission and by in the motor-driven speed changer.
At present, in the automotive transmission halting mechanism that has used, have following problem: the Parking motor speed is generally higher, can not directly give the Parking cam with transmission of power, so need arrange a small retarder between Parking cam and motor, this just makes Parking electric machine structure complexity, required precision height, control difficulty big; Some then adopts cam structure to drive park pawl, has problems such as installing and locating difficulty, Parking be unreliable; In addition, the Parking ratchet of most halting mechanisms all is mounted on the differential mechanism semiaxis, and the resisting moment that halting mechanism is subjected to is bigger, makes that halting mechanism is had relatively high expectations etc. aspect intensity.In sum, there is the requirement of strength height in existing halting mechanism, the installing and locating difficulty, and the control difficulty is big, Parking electric machine structure complexity, the high deficiency of required precision.
Summary of the invention
The utility model is at the deficiency of existing halting mechanism, model utility a kind of automotive transmission P retaining actuator, this mechanism structure is simple and clear, easy to use, good braking effect, can increase the reliability of automobile parking, suitable large-scale promotion is used.
For achieving the above object, automotive transmission P retaining actuator of the present utility model and control mode are as follows:
A kind of automotive transmission P retaining described in the utility model actuator comprises the Parking motor that is located at the mission case outside, is located at Worm-gear assembly, tooth bar assembly, Parking ratchet and park pawl in the mission case, it is characterized in that:
Described tooth bar assembly by rack shaft and the Parking cam stop collar, Parking cam and the Parking spring that are located at successively on the rack shaft polished rod part forms, the step in the middle part of an end of Parking spring and the rack shaft near, the other end and Parking cam near;
Described Worm-gear assembly is made up of the worm gear and the gear that are located on the worm-wheel shaft, one end of worm-wheel shaft stretches out mission case and is connected with P retaining sensor, this P retaining sensor is electrically connected with gear controller, P retaining sensor is judged the Parking cam position by detecting the Worm-gear assembly angle of swing, and voltage signal passed to gear controller, gear controller is judged the Parking cam position by the voltage signal that receives the output of P retaining sensor, thereby when decision sends working signal to the Parking motor, realizes control to P retaining with this; Section of rack engagement on the rack shaft of the wheel and rack assembly of Worm-gear assembly; The output terminal of Parking motor is connected with a worm screw, the worm gear engagement on this worm and wheel assembly;
The Parking cam of described tooth bar assembly and an end of park pawl are near the teeth groove corresponding matching on, the ratchet of the park pawl the other end and the Parking ratchet excircle that is connected on transmission input shaft.
Described a kind of automotive transmission P retaining actuator, its described park pawl is connected with mission case by the park pawl pin, and places in the mission case, and park pawl pin two ends cooperate with pin-and-hole on the casing; On detent pin, be with a park pawl return spring, in this cylindrical hole that park pawl return spring one end is located by connecting on the park pawl, the other end is located by connecting on mission case.
Described a kind of automotive transmission P keeps off actuator, and its described Parking motor is the DC brush magneto.Can realize rotating and reverse.Clockwise and anticlockwise by the control motor realizes the function of traditional drag-line halting mechanism, thereby (the not static P retaining of promptly hanging of car) damages the gearbox or the possibility in minimizing gearbox life-span after effectively avoiding occurring misoperation.
Described a kind of automotive transmission P keeps off actuator, and its described P retaining sensor is an angular displacement sensor.
Described a kind of automotive transmission P keeps off actuator, and its described Parking spring is a cylindrically coiled spring.
Described a kind of automotive transmission P keeps off actuator, its described park pawl return spring is a torsion spring, be installed on the park pawl pin, be used for park pawl return when withdrawing from the P retaining, can prevent also that simultaneously park pawl from freely not rotating when hanging the P retaining, clash into the gear or the cabinet wall of speed changer inside.
The utility model is compared with prior art and is had the following advantages: because Parking motor, P retaining sensor and gear controller are all outside mission case, other mechanical components are in mission case, so, simple and compact for structure, overall performance good, improved the reliability height of automobile parking; And be easy to make and control, it is low to produce cost, can be applicable on a large scale.
Description of drawings
Fig. 1 is schematic representation of the present utility model (having omitted mission case, transmission input shaft and gear controller among the figure);
Fig. 2 is the schematic representation of the halting mechanism of automobile shown in Figure 1 from another angle;
Fig. 3 is the schematic representation of rack shaft.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 2 and shown in Figure 3 a kind of automotive transmission P retaining actuator, comprise the Parking motor 13 that is located at the mission case outside, be located at Worm-gear assembly, tooth bar assembly, Parking ratchet 1 and park pawl 2 in the mission case;
Described tooth bar assembly is made up of rack shaft 8 and the Parking cam stop collar 5, Parking cam 6 and the Parking spring 7 that are located at successively on the rack shaft polished rod part, the step in the middle part of an end of Parking spring 7 and the rack shaft near, the other end and Parking cam near;
Described Worm-gear assembly is made up of the worm gear 10 and the gear 9 that are located on the worm-wheel shaft, and an end of worm-wheel shaft stretches out mission case and is connected with P retaining sensor 11, and this P retaining sensor is electrically connected with gear controller; P retaining sensor is judged the Parking cam position by detecting the Worm-gear assembly angle of swing, and voltage signal passed to gear controller, gear controller is judged the Parking cam position by the voltage signal that receives the output of P retaining sensor, thereby when decision sends working signal to the Parking motor, realizes control to P retaining with this; Section of rack engagement on the gear 9 of Worm-gear assembly and the rack shaft 8 of tooth bar assembly; The output terminal of Parking motor 13 is connected with a worm screw 12, worm gear 10 engagements on this worm and wheel assembly;
The Parking cam 6 of described tooth bar assembly and an end of park pawl 2 are near the teeth groove corresponding matching on, the ratchet of the park pawl the other end and Parking ratchet 1 excircle that is connected on transmission input shaft.
Further, described park pawl 2 is connected with mission case by park pawl pin 4, and places in the mission case, and park pawl pin 4 two ends cooperate with pin-and-hole on the casing; Be with a park pawl return spring 3 on detent pin 4, this park pawl return spring one end is located by connecting on the park pawl 2, the other end is located by connecting in the cylindrical hole of mission case.After the driver hangs gear on the P retaining, the Parking machine operation, the tooth bar assembly travels forward, the rotation of Parking cam extruding park pawl, the ratchet on the park pawl enters in the teeth groove of Parking ratchet, and this moment, the park pawl return spring was by torsional deflection; When the driver withdraws from gear from the P retaining, the counter-rotating of Parking motor, Parking cam disengages park pawl, park pawl break away from the engagement with the Parking ratchet under the effect of park pawl return spring.
Further, described Parking motor 13 is DC brush magnetoes.Can realize rotating and reverse.Clockwise and anticlockwise by the control motor realizes the function of traditional drag-line halting mechanism, thereby (the not static P retaining of promptly hanging of car) damages the gearbox or the possibility in minimizing gearbox life-span after effectively avoiding occurring misoperation.
Further, described P retaining sensor 11 is the Hall-type angular displacement sensor.
Further, described Parking spring 7 is a cylindrically coiled spring.The Parking spring has certain pretightening force after being installed on the tooth bar assembly, when hanging the P retaining, if park pawl does not snap in the teeth groove of Parking ratchet, the Parking cam can not advance, and motor will work on, rack shaft moves forward continuing, and Parking this moment spring is further compression on the basis of original pretightening force.When wheel rotated to an angle, park pawl hung the P retaining in Parking hook tooth groove is glided in the effect of Parking spring, realize latch functions.So design, the damage of motor or other component when having avoided delaying Parking.
Further, described park pawl return spring 3 is a torsion spring, is installed on the park pawl pin, is used for park pawl return when withdrawing from the P retaining, can prevent also that simultaneously park pawl from freely not rotating when hanging the P retaining, clash into the gear or the cabinet wall of speed changer inside.
The utility model is the input shaft of locking automotive transmission, the Parking ratchet is installed on the input shaft of automotive transmission, the Parking motor slows down through worm and gear, gear and tooth bar will rotatablely move and be converted into the straight line motion of Parking cam afterwards, and then promote park pawl and enter or withdraw from the Parking ratchet, thereby realize the parking function of P retaining.The halting mechanism working principle is as follows:
(1) Parking immediately;
After gear was hung the P retaining, the park pawl 2 in the halting mechanism was without realizing in the teeth groove of stagnating that directly falls into Parking ratchet 1 that parking function is referred to as Parking immediately.
After automobile comes to a complete stop, gear is hung the retaining into P, 13 startings of gear controller control Parking motor, Parking motor 13 drives worm screw 12 rotations, worm screw 12 rotations drive worm gear 10 and rotatablely move, and gear 9 and rack shaft 8 are converted into straight line motion with rotatablely moving of worm gear 10 afterwards.Parking spring 7 promotes Parking cam 6 and travels forward, and 6 pairs of park pawl 2 of Parking cam are pushed, and makes park pawl 2 around 4 rotations of park pawl pin, and park pawl 2 enters in the teeth groove of Parking ratchet 1.P retaining sensor 11 on Worm-gear assembly detects the angle that worm gear turns over, and its signal is passed to gear controller, and gear controller sends control command, and the Parking motor is stopped operating.The park pawl rotation makes 3 torsional deflections of park pawl return spring.When car on the slope because gravity or other external force are done the time spent, wheel can roll by nature slowly, Parking ratchet 1 rotates and contacts with park pawl 2, when the moment of rotation of wheel in opposing torque that 2 pairs of Parking ratchets of park pawl 1 produce and the car traveling process balances each other, wheel is through stop motion after the deceleration of moment, realization is finished the Parking action to the locking of input shaft.
(2) delay Parking;
After gear was hung P retaining, park pawl 2 stopped at earlier that the realization parking function is referred to as to delay Parking in the teeth groove that just falls into Parking ratchet 1 after tooth top position a period of time of Parking ratchet 1.
After automobile comes to a complete stop, gear is hung the retaining into P, 13 startings of gear controller control Parking motor, Parking motor 13 drives worm screw 12 rotations, the worm gear 10 that worm screw 12 rotations drive Worm-gear assembly rotatablely moves, and gear 9 and rack shaft 8 are converted into straight line motion with rotatablely moving of worm gear 10 afterwards.Parking spring 7 promotes Parking cam 6 and travels forward, and 6 pairs of park pawl 2 of Parking cam are pushed, and makes park pawl 2 around 4 rotations of park pawl pin, stop motion when park pawl 2 is run into Parking ratchet 1 tooth top.And meanwhile tooth bar 8 moves on, and compression Parking spring 7 detects Worm-gear assembly until P retaining sensor 11 and turns to specific angle, and signal is passed to gear controller, and gear controller sends control command, and the Parking motor is stopped operating immediately.When car on the slope because gravity or other external force are done the time spent, wheel can roll by nature slowly, when Parking ratchet 1 tooth top left park pawl 2, park pawl 2 was subjected to the extruding of Parking cam 6, made it enter in the sour jujube groove of Parking ratchet 1.When the moment of rotation of wheel in opposing torque that 2 pairs of Parking ratchets of park pawl 1 produce and the car traveling process balanced each other, wheel was through the deceleration stop motion of moment, and the Parking action is finished, the realization parking function.
(3) withdraw from the P retaining;
Automobile withdraws from gear from the P retaining before startup.13 counter-rotatings of gear controller control Parking motor, this hour rack assembly retreats, and around 4 rotations of park pawl pin, park pawl 2 withdraws from Parking ratchet 1 groove park pawl 2 under the effect of park pawl return spring 3.Turn to specific angle when P retaining sensor 11 detects worm gear, signal is passed to gear controller, gear controller control Parking motor 13 stops operating, thereby realizes withdrawing from parking function.
Claims (6)
1. automotive transmission P retaining actuator comprises the Parking motor (13) that is located at the mission case outside, is located at Worm-gear assembly, tooth bar assembly, Parking ratchet (1) and park pawl (2) in the mission case, it is characterized in that:
Described tooth bar assembly is made up of rack shaft (8) and the Parking cam stop collar (5), Parking cam (6) and the Parking spring (7) that are located at successively on the rack shaft polished rod part, the step in the middle part of an end of Parking spring (7) and the rack shaft near, the other end and Parking cam near;
Described Worm-gear assembly is made up of the worm gear (10) and the gear (9) that are located on the worm-wheel shaft, one end of worm-wheel shaft stretches out mission case and is connected with P retaining sensor (11), this P retaining sensor (11) is electrically connected with gear controller, the section of rack engagement on the rack shaft (8) of gear of Worm-gear assembly (9) and tooth bar assembly; The output terminal of Parking motor (13) is connected with a worm screw (12), worm gear (10) engagement on this worm and wheel assembly;
The Parking cam (6) of described tooth bar assembly and an end of park pawl (2) are near the teeth groove corresponding matching on, the ratchet of the park pawl the other end and Parking ratchet (1) excircle that is connected on transmission input shaft.
2. a kind of automotive transmission P according to claim 1 keeps off actuator, it is characterized in that: described park pawl (2) is connected with mission case by park pawl pin (4), and place in the mission case, park pawl pin (4) two ends cooperate with pin-and-hole on the casing; Be with a park pawl return spring (3) on detent pin (4), this park pawl return spring one end is located by connecting on the park pawl (2), the other end is located by connecting in the cylindrical hole of mission case.
3. a kind of automotive transmission P according to claim 1 and 2 keeps off actuator, and it is characterized in that: described Parking motor (13) is the DC brush magneto.
4. a kind of automotive transmission P according to claim 1 and 2 keeps off actuator, it is characterized in that: described P retaining sensor (11) is angular displacement sensor.
5. a kind of automotive transmission P according to claim 1 and 2 keeps off actuator, and it is characterized in that: described Parking spring (7) is a cylindrically coiled spring.
6. a kind of automotive transmission P according to claim 2 keeps off actuator, and it is characterized in that: described park pawl return spring (3) is a torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120174470 CN202065461U (en) | 2011-05-27 | 2011-05-27 | P-gear actuating mechanism of automotive transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120174470 CN202065461U (en) | 2011-05-27 | 2011-05-27 | P-gear actuating mechanism of automotive transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202065461U true CN202065461U (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120174470 Expired - Lifetime CN202065461U (en) | 2011-05-27 | 2011-05-27 | P-gear actuating mechanism of automotive transmission |
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| Country | Link |
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| CN (1) | CN202065461U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278467A (en) * | 2011-05-27 | 2011-12-14 | 重庆青山工业有限责任公司 | P-gear executing mechanism of automotive transmission |
| CN103759001A (en) * | 2014-02-06 | 2014-04-30 | 北京阳铭诚科技有限责任公司 | Electric vehicle parking device |
| CN104832637A (en) * | 2014-02-06 | 2015-08-12 | 福特全球技术公司 | Transmission and method of engagement |
| CN104943666A (en) * | 2014-03-31 | 2015-09-30 | 比亚迪股份有限公司 | Automatic parking control system for vehicle and control method thereof and vehicle |
| CN105822733A (en) * | 2016-05-30 | 2016-08-03 | 重庆青山工业有限责任公司 | Dual-clutch type two-gear pure electric transmission |
-
2011
- 2011-05-27 CN CN 201120174470 patent/CN202065461U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278467A (en) * | 2011-05-27 | 2011-12-14 | 重庆青山工业有限责任公司 | P-gear executing mechanism of automotive transmission |
| CN103759001A (en) * | 2014-02-06 | 2014-04-30 | 北京阳铭诚科技有限责任公司 | Electric vehicle parking device |
| CN104832637A (en) * | 2014-02-06 | 2015-08-12 | 福特全球技术公司 | Transmission and method of engagement |
| CN104832637B (en) * | 2014-02-06 | 2019-08-23 | 福特全球技术公司 | Speed changer and its operating method |
| CN104943666A (en) * | 2014-03-31 | 2015-09-30 | 比亚迪股份有限公司 | Automatic parking control system for vehicle and control method thereof and vehicle |
| CN105822733A (en) * | 2016-05-30 | 2016-08-03 | 重庆青山工业有限责任公司 | Dual-clutch type two-gear pure electric transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111207 |