CN108930789B - Simple electronic parking mechanism - Google Patents
Simple electronic parking mechanism Download PDFInfo
- Publication number
- CN108930789B CN108930789B CN201810856918.4A CN201810856918A CN108930789B CN 108930789 B CN108930789 B CN 108930789B CN 201810856918 A CN201810856918 A CN 201810856918A CN 108930789 B CN108930789 B CN 108930789B
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- CN
- China
- Prior art keywords
- pawl
- worm
- tooth
- ratchet wheel
- wheel
- 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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Classifications
-
- 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
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
-
- 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/08—Range selector apparatus
-
- 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
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3466—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using electric motors
Abstract
The invention relates to a simple electronic parking mechanism which comprises a worm wheel and a worm which are meshed, wherein the worm is connected with an output shaft of a P-gear driving motor, a rotatable pin shaft is arranged in the center of the worm wheel, a pawl is arranged on the pin shaft, the worm wheel is connected with the pawl through a torsion spring, a ratchet wheel is arranged below the pawl, the ratchet wheel is fixed on a gear shaft of a speed reducer, and a top tooth corresponding to the tooth groove shape of the ratchet wheel is arranged on the pawl. Compared with the prior art, the invention realizes the reliable locking of the P-gear mechanism by the self-locking characteristic of the worm and gear mechanism, avoids the dead point locking defect, and has the advantages of simple structure and the like.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a simple electronic parking mechanism.
Background
The P-gear parking mechanism is an essential safety mechanism matched with an AT box of an automobile or a pure electric automobile, is mainly used for preventing the automobile from sliding after parking, and also ensures that the automobile can be parked on a slope for a long time. The P-range parking mechanism generally prevents rotation of the drive axle shafts by mechanically locking the gearbox input/output shafts when the vehicle speed is low (typically less than 3 km/h) or stationary, thereby preventing the wheels from rolling for parking purposes. The P-gear parking mechanism is divided into mechanical parking and electronic parking according to a driving mode, and the mechanical electronic parking is gradually replaced by electronic parking along with continuous improvement of the electronic degree of the automobile.
Although the electronic P-gear parking mechanism is widely applied to various AT boxes and gear boxes of pure electric vehicles AT present, the following problems still exist in the existing structure:
1. the structure is comparatively bloated, and current electron P keeps off the part that the mechanism contains generally more, has taken great gear box inner space, has taken difficulty simultaneously for installation and maintenance. In addition, the number of parts is large, and higher requirements are also put on the reliability of the P-gear mechanism.
2. The existing electronic P-gear mechanism generally limits the rotation of the pawl through the dead point position of the cam mechanism, and the locking performance of the existing electronic P-gear mechanism is reduced along with the abrasion deformation of the cam or the contact part of the cam and the pawl in the use process.
3. When the existing electronic P-gear mechanism is unlocked, power is usually only provided by a torsion spring, and the unlocking force and the unlocking speed are easy to be insufficient, so that the parking performance is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a simple electronic parking mechanism.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a simple and easy electron formula parking mechanism, includes worm wheel and the worm of meshing, the output shaft of P fender driving motor is connected to the worm, the center of worm wheel is equipped with rotatable round pin axle, epaxial pawl that is equipped with, the worm wheel passes through torsion spring and connects the pawl, the below of pawl is equipped with the ratchet, the ratchet is fixed on the gear shaft of reduction gear, be equipped with on the pawl with the tooth top tooth that the tooth's socket shape of ratchet corresponds.
Preferably, a sliding bearing is arranged between the worm wheel and the pin shaft, and the sliding bearing is in interference fit with the worm wheel.
Preferably, a shaft sleeve for axial limiting is arranged between the worm wheel and the pawl.
Preferably, when the P-gear driving motor rotates clockwise, the worm wheel and the torsion spring drive the pawl to rotate clockwise in sequence, and if the top tooth of the pawl is opposite to the tooth groove of the ratchet wheel, the top tooth of the pawl is clamped into the tooth groove of the ratchet wheel.
Preferably, when the P-gear driving motor rotates clockwise, the worm wheel and the torsion spring drive the pawl to rotate clockwise in sequence, if the top tooth of the pawl is opposite to the tooth top of the ratchet wheel, the worm wheel continuously applies clockwise torque to the pawl through the compression torsion spring, and when the ratchet wheel rotates to the state that the tooth groove is opposite to the top tooth of the pawl, the top tooth of the pawl is clamped into the tooth groove of the ratchet wheel.
Preferably, when the top tooth of the pawl is clamped into the tooth groove of the ratchet wheel, the P-gear driving motor rotates anticlockwise to drive the pawl to rotate anticlockwise, so that the top tooth of the pawl is separated from the ratchet wheel.
Compared with the prior art, the invention has the following advantages:
1. the reliable locking of the P-gear mechanism is realized through the self-locking characteristic of the worm gear mechanism, and the dead point locking defect is avoided.
2. The pawl is directly driven by the torsion spring, so that the unlocking moment is increased compared with the traditional design, the possibility that the unlocking failure cannot occur to the P gear mechanism is reduced, and the quick and reliable unlocking process is realized.
3. The function of the P-gear parking mechanism is realized by using fewer parts, and the structure is simple.
Drawings
FIG. 1 is a schematic view of a pawl locked in a ratchet wheel according to the present invention;
FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of the pawl top teeth and ratchet teeth in the positive alignment during the P-stop locking process of the present invention;
fig. 4 is a schematic structural view of the torsion spring in a natural state according to the present invention.
The drawing is marked: 1. the worm, 2, the worm wheel, 3, the pawl, 4, the ratchet, 5, the gear shaft, 6, the round pin axle, 7, slide bearing, 8, torsion spring, 9, axle sleeve.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
Examples
As shown in fig. 1, the simple electronic parking mechanism comprises an engaged worm wheel 2 and a worm 1, wherein the worm 1 is connected with an output shaft of a P-gear driving motor, the worm 1 and the worm wheel 2 are engaged with each other to have a self-locking characteristic, the worm 1 can drive the worm wheel 2 to rotate, and the worm wheel 2 cannot drive the worm 1 to rotate. The center of the worm wheel 2 is provided with a rotatable pin shaft 6, the pin shaft 6 is provided with a pawl 3, the worm wheel 2 is connected with the pawl 3 through a high-rigidity torsion spring 8, and the torsion spring 8 restrains the worm wheel 2 and the pawl 3 from rotating relatively. A ratchet wheel 4 is arranged below the pawl 3, the ratchet wheel 4 is fixed on a gear shaft 5 of the speed reducer, and the pawl 3 is provided with top teeth corresponding to the tooth groove shape of the ratchet wheel 4.
As shown in fig. 2, a sliding bearing 7 is arranged between the worm wheel 2 and the pin shaft 6, and the sliding bearing 7 is in interference fit with the worm wheel 2, so that the worm wheel 2 can rotate around the pin shaft 6 smoothly. A shaft sleeve 9 for axial limiting is arranged between the worm wheel 2 and the pawl 3.
The pawl 3 and the ratchet wheel 4 have two motion states of engagement and disengagement, which correspond to a locking state and an unlocking state respectively. The specific working process of the device is as follows.
1. P-block lock
The P keeps off driving motor clockwise rotation, and worm 1 drives worm wheel 2, and worm wheel 2 drives torsion spring 8, and torsion spring 8 drives pawl 3 clockwise rotation, to the difference of the top tooth of pawl 3 and the tooth's socket relative position of ratchet 4, there are following two kinds of situations:
1) If the top teeth of the pawl 3 are opposite to the tooth grooves of the ratchet wheel 4, as shown in fig. 1, the top teeth of the pawl 3 are smoothly clamped into the tooth grooves of the ratchet wheel 4;
2) If the top teeth of the pawl 3 are opposite to the tooth tops of the ratchet wheel 4, as shown in fig. 3, the worm wheel 2 continuously applies clockwise torque to the pawl 3 by compressing the torsion spring 8, and when the ratchet wheel 4 rotates until the tooth grooves are opposite to the top teeth of the pawl 3, the top teeth of the pawl 3 are smoothly clamped into the tooth grooves of the ratchet wheel 4.
After the top teeth of the pawl 3 are inserted into the tooth grooves of the ratchet wheel 4, the gear shaft 5 which is in linkage with the ratchet wheel 4 is locked, and at the moment, the motor shaft of the P-gear drive motor stops rotating. The worm wheel 2 and the worm 1 form self-locking, and the pawl 3 cannot drive the worm wheel 2 to rotate anticlockwise through the torsion spring 8.
When the vehicle is parked on a slope or the vehicle vibrates, the pawl 3 receives counterclockwise torque, but the pawl 3 cannot move due to the self-locking characteristic of the worm wheel 2 and the worm 1, so that the vehicle can be reliably parked on the slope for a long time.
2. P-block release lock
The P-gear driving motor rotates anticlockwise, the worm 1 drives the worm wheel 2 to rotate anticlockwise, the worm wheel 2 drives the pawl 3 to rotate anticlockwise through the torsion spring 8, and top teeth of the pawl 3 are separated from the ratchet wheel 4, as shown in fig. 4.
Unlike the common electronic type P gear parking unlocking force which is completely driven by the rebound of the torsion spring 8, when the device is unlocked, the motor directly drives the torsion spring 8 to drive the pawl 3 to rotate anticlockwise through the transmission system, so that the device has larger unlocking moment compared with the traditional design, and the quick and reliable unlocking is realized.
When the design is unlocked, the pawl 3 is not limited to swing under the action of the torsion spring 8, and when the pawl is unlocked, the worm wheel 2 drives the torsion spring 8 to rotate anticlockwise together, so that the swing of the pawl 3 can not influence the operation of the P-gear mechanism.
Claims (4)
1. The simple electronic parking mechanism is characterized by comprising a worm wheel and a worm which are meshed, wherein the worm is connected with an output shaft of a P-gear driving motor, a rotatable pin shaft is arranged in the center of the worm wheel, a pawl is arranged on the pin shaft, the worm wheel is connected with the pawl through a torsion spring, a ratchet wheel is arranged below the pawl, the ratchet wheel is fixed on a gear shaft of a speed reducer, and a top tooth corresponding to the tooth groove shape of the ratchet wheel is arranged on the pawl;
when the P-gear driving motor rotates clockwise, the worm wheel and the torsion spring drive the pawl to rotate clockwise in sequence, and if the top tooth of the pawl is opposite to the tooth groove of the ratchet wheel, the top tooth of the pawl is clamped into the tooth groove of the ratchet wheel; when the P-gear driving motor rotates clockwise, the worm wheel and the torsion spring drive the pawl to rotate clockwise in sequence, if the top tooth of the pawl is opposite to the tooth top of the ratchet wheel, the worm wheel continuously applies clockwise torque to the pawl through the compression torsion spring, and when the ratchet wheel rotates until the tooth groove is opposite to the top tooth of the pawl, the top tooth of the pawl is clamped into the tooth groove of the ratchet wheel.
2. The simple electronic parking mechanism according to claim 1, wherein a sliding bearing is arranged between the worm wheel and the pin shaft, and the sliding bearing is in interference fit with the worm wheel.
3. The simple electronic parking mechanism according to claim 1, wherein a shaft sleeve for axial limiting is arranged between the worm wheel and the pawl.
4. The simple electronic parking mechanism according to claim 1, wherein when the top tooth of the pawl is clamped into the tooth slot of the ratchet wheel, the P-gear driving motor rotates anticlockwise to drive the pawl to rotate anticlockwise, so that the top tooth of the pawl is separated from the ratchet wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856918.4A CN108930789B (en) | 2018-07-31 | 2018-07-31 | Simple electronic parking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856918.4A CN108930789B (en) | 2018-07-31 | 2018-07-31 | Simple electronic parking mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108930789A CN108930789A (en) | 2018-12-04 |
| CN108930789B true CN108930789B (en) | 2023-09-29 |
Family
ID=64444406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810856918.4A Active CN108930789B (en) | 2018-07-31 | 2018-07-31 | Simple electronic parking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108930789B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113330237B (en) * | 2019-03-13 | 2022-11-08 | 舍弗勒技术股份两合公司 | P-gear locking mechanism of in-wheel driving system, in-wheel driving system and motor vehicle |
| CN112128370A (en) * | 2019-06-25 | 2020-12-25 | 浙江吉智新能源汽车科技有限公司 | Reduction gear parking mechanism and vehicle |
| CN111011023B (en) * | 2019-12-26 | 2022-03-01 | 山东金博祥园林工程有限公司 | Convenient gardens of removing are pruned high bench |
| CN112024725A (en) * | 2020-08-27 | 2020-12-04 | 天津泰正机械有限公司 | Stamping device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745822A (en) * | 1985-04-19 | 1988-05-24 | Rockwell International Corporation | Two speed axle |
| CN102135176A (en) * | 2011-03-30 | 2011-07-27 | 重庆青山工业有限责任公司 | Parking mechanism of electric automobile |
| 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 |
| CN202280828U (en) * | 2011-10-14 | 2012-06-20 | 钱潮轴承有限公司 | Automatic transmission box parking mechanism |
| CN202349192U (en) * | 2011-10-31 | 2012-07-25 | 长城汽车股份有限公司 | Actuating mechanism for electric parking brake |
| CN205401687U (en) * | 2016-02-29 | 2016-07-27 | 浙江万里扬股份有限公司 | Commercial car parking device |
-
2018
- 2018-07-31 CN CN201810856918.4A patent/CN108930789B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745822A (en) * | 1985-04-19 | 1988-05-24 | Rockwell International Corporation | Two speed axle |
| CN102135176A (en) * | 2011-03-30 | 2011-07-27 | 重庆青山工业有限责任公司 | Parking mechanism of electric automobile |
| 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 |
| CN202280828U (en) * | 2011-10-14 | 2012-06-20 | 钱潮轴承有限公司 | Automatic transmission box parking mechanism |
| CN202349192U (en) * | 2011-10-31 | 2012-07-25 | 长城汽车股份有限公司 | Actuating mechanism for electric parking brake |
| CN205401687U (en) * | 2016-02-29 | 2016-07-27 | 浙江万里扬股份有限公司 | Commercial car parking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108930789A (en) | 2018-12-04 |
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