CN208845705U - A kind of novel speed changer parking cam mechanism - Google Patents
A kind of novel speed changer parking cam mechanism Download PDFInfo
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- CN208845705U CN208845705U CN201820889262.1U CN201820889262U CN208845705U CN 208845705 U CN208845705 U CN 208845705U CN 201820889262 U CN201820889262 U CN 201820889262U CN 208845705 U CN208845705 U CN 208845705U
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- parking
- park pawl
- spring
- axis
- parking cam
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Abstract
A kind of novel speed changer parking cam mechanism, it includes parking Cam set assembly (1), park pawl assembly (2), park pawl axis (3), park pawl return torsional spring (4), parking gear (5), positioning spring pin (6) and steel are by composite bush (7), steel is fitted in transmission case body opening by composite bush (7) interference, parking Cam set assembly (1) can rotate in it, positioning spring pin (6) interference is mounted in transmission case body opening, spin (601) same to fanning strip (102) groove cooperation on positioning spring pin (6) realizes that P gear sets the conversion set with non-P gear.The characteristics of relative motion of idler wheel and park pawl in park pawl assembly is changed to roll by the utility model by sliding, and is greatly reduced slope road and is plucked gear torque, while having that structure is simple, easy for installation, low in cost and reliable operation.
Description
Technical field
The utility model belongs to the transmission technology field of auto manufacturing, in particular to a kind of novel speed changer parking
Cam mechanism.
Background technique
To make vehicle realize parking function when slope road is stopped, vehicle car slipping is prevented.In automatic transmission and retarder
It usually will be installed halting mechanism, realize secure ratcs function of the vehicle on level road and slope road.Halting mechanism by speed changer outside
Parking actuator and internal mechanical halting mechanism two parts composition, parking actuator can be Purely mechanical, manual by driver
Operation；It can also be motor or fluid pressure type, substitute conventional pull wires and handle.No matter which kind of driving method is external actuator use, interior
The mechanical halting mechanism in portion has almost no change in principle, is all ratchet and pawl structure, only pushes the machine of pawl movement
Structure is not quite similar, and is divided into cam-type, pull rod pin type and double rollers relative rolling type.The utility model is some with regard to cam-type halting mechanism
Problem is innovated and is improved.
When P, which is kept off, to be engaged, parking actuator drives the rotation of parking Cam set assembly, and parking Cam set assembly pushes park pawl total
At, push it into the tooth socket of parking gear, realize P keep off parked state；When P, which is kept off, to be separated, parking actuator drives parking convex
Wheel assembly rotates in reverse direction, guarantees that park pawl assembly is detached from from the tooth socket of parking gear, realizes and release parking function.
Parking cam mechanism spaces compact, manufacturing cost is low, but because its principle limits, deposits between multiple movement parts when plucking gear
In sliding friction, it is bigger than normal to pluck gear torque when Po Lu plucks gear, plucks gear torque to reduce slope road, multiple patents propose corresponding schemes:
Parking gear is arranged in jackshaft by patent " 2009/0193931 A1 of US " (Parking Lock Arrangement), is reduced
The load of parking gear uses minor radius cam, reduces slope road and plucks gear torque, but cam and pawl are sliding friction, in vehicle
Gear power will be plucked in the increased situation of weight increased dramatically；" CN201120089293.7 " (a kind of halting mechanism of electric car) uses
Motor is shifted gears, cam and pawl are still sliding friction, are wanted to the torque of actuator as gear actuator is plucked although not having to manpower
Ask higher；Patent " CN 207093744U " (a kind of double-clutch automatic transmission halting mechanism) is arranged due to parking gear
On differential mechanism, parking gear slope road load is very big, thus propose various ways reduction pluck gear torque: take eccentric cam,
Parking axis increases antifriction bush, park pawl and cam with housing into rotation rubbing surface and is contacted by idler wheel.But idler wheel and parking pin
Axis is still sliding friction, and frictional force is very big on gear torque influence is plucked herein.The utility model is by the phase of idler wheel and park pawl
Movement is changed to roll by sliding, slope road is greatly reduced and plucks gear torque；Furthermore the utility model proposes new cams to pluck
Gear mode.
Summary of the invention
The purpose of this utility model is that providing parking brake mechanism for automatic transmission or retarder, solve general convex
The big problem of gear torque is plucked on wheel halting mechanism slope road, specifically provides a kind of novel speed changer parking cam mechanism.
A kind of novel speed changer parking cam mechanism, it includes parking Cam set assembly 1, park pawl assembly 2, parking spine
Pawl axis 3, park pawl return torsional spring 4, parking gear 5, positioning spring pin 6 and steel are by composite bush 7, and steel is by composite bush 7
Interference is fitted in transmission case body opening, and positioning spring pin 6 is fitted in transmission case body opening, parking Cam set assembly 1 and steel quilt
Composite bush 7 is movably arranged on together, and park pawl axis 3 is mounted in speed changer hole, park pawl assembly 2 and park pawl axis
3 are movably arranged on together, parking gear 5 be rigidly connected to on axis of the wheel at a constant-speed ratio, parking Cam set assembly 1 with
2 Matching installation of park pawl assembly is together；
The parking Cam set assembly 1 is by parking cam 101, fanning strip 102, cam return torsional spring 103, limit sleeve 104,
Parking axis 105 forms, and parking axis 105 and fanning strip 102 weld together, and 104 interference of limit sleeve is mounted on parking axis 105,
Parking cam 101 is mounted among shaft shoulder 105a and limit sleeve 104 on parking axis 105, fanning strip 102 and parking camming rim
101a contact, the park pawl assembly 2 by park pawl 201, idler wheel 202, park pawl pin 203, rolling wheel support 204,
Stand spring 205 and spring supporting pin 206 form, and park pawl pin 203 and 202 elastic conjunction of idler wheel are installed along with parking
In the groove 201c of pawl 201,205 one end of stand spring is mounted on spring supporting pin 206, and one end is squeezed and pushes away rolling wheel support 204,
Park pawl 201 is contacted by idler wheel 202 with parking cam 101, and 204a encases idler wheel side 202a, spring on the inside of rolling wheel support
206 one end of supporting pin is fitted in park pawl 201, other end housing stand spring 205.
Further the parking axis 105 and fanning strip 102 weld together；
Spin 601 on the positioning spring pin 6 cooperate with 102 groove of fanning strip realize P gear set and
The conversion that non-P gear is set；
The further steel is had PTFE coating inside composite bush 7, be can effectively reduce friction, is avoided parking axis
105 and transmission case body opening directly contact, occur glued phenomenon under stress condition.
The utility model relates to a kind of novel speed changer parking cam mechanisms, by idler wheel and parking in park pawl assembly
The relative motion of pawl is changed to roll by sliding, and greatly reduces slope road and plucks gear torque.The utility model has structure simple,
It is easy for installation, the characteristics of low in cost and reliable operation.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the position view of each component of the utility model under P gear state；
Fig. 3 is the position view of each component of the utility model during plucking P gear；
Fig. 4 is the position view of each component of the utility model under non-P gear state；
Fig. 5 is the structural schematic diagram of the utility model park pawl assembly.
Fig. 6 is the side structure schematic view of the utility model park pawl assembly.
Fig. 7 is the structural schematic diagram of the utility model parking Cam set assembly.
Appended drawing reference: park pawl assembly (2), park pawl (201), park pawl groove floor (201a), parking spine
Pawl side is slotted (201b), park pawl groove side (201c), idler wheel (202), idler wheel side (202a), park pawl pin
(203), rolling wheel support (204), rolling wheel support inside (204a), stand spring (205), spring supporting pin (206)；Parking cam
Assembly (1), parking cam (101), parking camming rim (101a), fanning strip (102), cam return torsional spring (103), limit sleeve
(104), parking axis (105), parking crown of roll platform (105a), park pawl axis (3), park pawl return torsional spring (4), parking gear
(5), positioning spring pin (6), spin (601), steel is by composite bush (7).
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
As shown in Figure 1, Figure 2 and Figure 7, a kind of novel speed changer parking cam mechanism, it include parking Cam set assembly 1,
Park pawl assembly 2, park pawl axis 3, park pawl return torsional spring 4, parking gear 5, positioning spring pin 6 and steel are compound
Bushing 7, it is characterized in that: parking Cam set assembly 1 is by parking cam 101, fanning strip 102, cam return torsional spring 103, limit sleeve
104, parking axis 105 forms, and parking axis 105 and fanning strip 102 weld together, and 104 interference of limit sleeve is mounted on parking axis 105
On, the axial movement of shaft shoulder 105a on parking axis 105 and limit sleeve 104 limitation parking cam 101 jointly, fanning strip 102 with
Parking camming rim 101a contact, rotary spacing as parking cam 101 and plucks gear, further park pawl assembly 2 by
Park pawl 201, idler wheel 202, park pawl pin 203, rolling wheel support 204, stand spring 205 and spring supporting pin 206 form,
Park pawl pin 203 and 202 elastic conjunction of idler wheel, are installed along in the groove 201c of park pawl 201, stand spring 205
One end is mounted on spring supporting pin 206, and one end, which is squeezed, pushes away rolling wheel support 204, and park pawl 201 is convex by idler wheel 202 and parking
101 contact of wheel, idler wheel 202 can be rolled in park pawl groove floor 201a, and park pawl pin 203 is in park pawl side
The interior movement of the 201b that slots, in the mounted state, 205 pushing rolling wheels bracket 204 of stand spring, rolling wheel support 204 is also stayed simultaneously
The fluting 201b limitation of vehicle pawl side, and then be pressed on park pawl pin 203, the position of park pawl pin 203 is then defined,
Idler wheel side 202a is parked detent recess side 201c limitation, and the motion profile of idler wheel 202 is restrained, on the inside of rolling wheel support
204a encases idler wheel side 202a, and such rolling wheel support 204 cannot be deviate from from park pawl groove at side surface 201b, spring
206 one end of supporting pin is fitted in park pawl 201, other end housing stand spring 205, and steel is pressed by 7 interference of composite bush
In transmission case body opening, parking axis 105 can rotate in it, and 6 interference of positioning spring pin is mounted in transmission case body opening, fixed
Spin 601 on the spring catch 6 of position cooperates with 102 groove of fanning strip realizes that P gear sets the conversion set with non-P gear.
The utility model devises parking cam in the limit sleeve 104 in parking Cam set assembly, the shaft shoulder on parking axis 105
105a location structure plucks gear structure including fanning strip 102, parking camming rim 101a, and idler wheel is pure in park pawl assembly
Rolling structure, and steel is installed by composite bush 7 at parking axis.
As shown in Figure 2 and Figure 4, when P, which is kept off, to be combined, parking actuator drives parking axis 105 by spline and is welded on it
On fanning strip 102 rotate, fanning strip 102 by cam return torsional spring 103 drive parking cam 101 (at this point, cam return turn round
Spring 103 plays the role of power transmission), pushing rolling wheels 202 and park pawl 201 move downward realization and stay after parking cam 101 rotates
Vehicle function, at this point, due to idler wheel 202 and park pawl pin 203 be parked under the action of stand spring 205 pawl side fluting
201b limitation, therefore when P keep off combine when idler wheel 202 relative to park pawl 201 do not have relative motion；If parking cam
Park pawl 201 cannot be depressed and be fallen into the tooth socket of parking gear 5 by 101, and parking cam 101 will bear against on idler wheel 202,
At this moment, not in the position of combination, cam return torsional spring 103 deforms parking cam 101, plays the role of energy storage, fanning strip 102 with
Parking camming rim 101a separation；After vehicle car slipping, park pawl 201 is pressed into parking gear 5 by the rotation of parking cam 101
In tooth socket, realize that P gear combines, fanning strip 102 contacts again with parking camming rim 101a.
As shown in figure 3, parking actuator is by spline drive parking axis 105 and its is welded thereon when P keeps off and separating
Fanning strip 102 rotates backward, and 102 power transmission of fanning strip rotates parking cam 101 to parking camming rim 101a.
Further, if vehicle resides on level road, parking gear 5 is zero load, idler wheel 202 and parking cam 101
Normal pressure very little, the normal pressure of idler wheel 202 and park pawl groove floor 201a also very little, idler wheel 202 and parking cam 101 and
The sum of frictional force of park pawl groove floor 201a is less than stand spring 205 to the spring force of idler wheel 202, and idler wheel 202 will not
It can be rolled along park pawl groove floor 201a.
Further, if vehicle is resident on the slope, there are larger load, idler wheel 202 and parking cams for parking gear 5
101 normal pressure is very big, and the normal pressure of idler wheel 202 and park pawl groove floor 201a are also very big, and idler wheel 202 and parking are convex
Take turns spring force of the sum of the frictional force of 101 and park pawl groove floor 201a much larger than stand spring 205 to idler wheel 202, rolling
Wheel 202 will roll simultaneously along park pawl groove floor 201a and parking cam 101, and stand spring 205 is compressed；It is kept off in P
Parking position, park pawl groove floor 201a should design camber, and concentric with parking axis 105.
Later, park pawl 201 pops up, and park pawl 201 is deviate from from the tooth socket of parking gear 5, realizes P gear point
From function.At this point, the arc surface of park pawl idler wheel 202 and parking cam 101 is in contact.Park pawl return torsional spring 4 is always
It is pressed in park pawl idler wheel 202 on parking cam 101, the return torque of park pawl return torsional spring 4 is park pawl
6~7 times of 201 gravity prevent it from causing park pawl 201 accidentally to fall into the tooth socket of parking gear 5 due to vehicle vibration.This
When, 205 pushing rolling wheels of stand spring, 202 return.
Gear torque is plucked for reduction cam halting mechanism, this patent is realized in terms of following two.
As shown in Figure 1, interference is equipped with steel by composite bush 7 on case of transmission, steel is had inside composite bush
The rotation friction of parking axis 105 can effectively drop in PTFE coating, and parking axis 105 and transmission case body opening is avoided directly to contact,
Occurs glued phenomenon under stress condition.
As shown in figure 3, idler wheel 202 will be along park pawl groove floor 201a and parking cam when P gear in slope road plucks gear
101 roll simultaneously, and change sliding friction greatly reduces rubbing between parking cam 101 and park pawl 201 into rolling friction
Power is wiped, very big reduce plucks gear torque.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with retouching.
Claims (5)
1. a kind of novel speed changer parking cam mechanism, it includes parking Cam set assembly (1), park pawl assembly (2), parking
Pawl shaft (3), park pawl return torsional spring (4), parking gear (5), positioning spring pin (6) and steel are by composite bush (7), steel
It is fitted in transmission case body opening by composite bush (7) interference, positioning spring pin (6) is fitted in transmission case body opening, parking
Cam set assembly (1) and steel are movably arranged on together by composite bush (7), and park pawl axis (3) is mounted in speed changer hole, parking
Pawl assembly (2) and park pawl axis (3) are movably arranged on together, and parking gear (5) is rigidly connected to wheel at certain
On the axis of speed ratio, parking Cam set assembly (1) together with park pawl assembly (2) Matching installation, it is characterized in that: the parking
Cam set assembly (1) is by parking cam (101), fanning strip (102), cam return torsional spring (103), limit sleeve (104), parking axis
(105) it forms, parking axis (105) and fanning strip (102) weld together, and limit sleeve (104) interference is mounted on parking axis (105)
On, parking cam (101) is mounted among the shaft shoulder (105a) on parking axis (105) and limit sleeve (104), fanning strip (102)
It is contacted with parking camming rim (101a), the park pawl assembly (2) is by park pawl (201), idler wheel (202), parking
Detent pin (203), rolling wheel support (204), stand spring (205) and spring supporting pin (206) composition, park pawl pin (203)
It with idler wheel (202) elastic conjunction, is installed along in the groove (201c) of park pawl (201), stand spring (205) one end peace
On spring supporting pin (206), one end is squeezed and is pushed away rolling wheel support (204), and park pawl (201) passes through idler wheel (202) and parking
Cam (101) contact, rolling wheel support inside (204a) encase idler wheel side (202a), and spring supporting pin (206) one end is fitted in
In park pawl (201), other end housing stand spring (205).
2. the novel speed changer parking cam mechanism of one kind according to claim 1, it is characterized in that: the retaining spring
Sell spin (601) same to fanning strip (102) groove cooperation on (6).
3. the novel speed changer parking cam mechanism of one kind according to claim 1, it is characterized in that: the steel is compound
There is PTFE coating inside bushing (7).
4. the novel speed changer parking cam mechanism of one kind according to claim 1, it is characterized in that: the park pawl
Camber is designed in the bottom surface (201a) of groove (201c), and concentric with parking axis (105).
5. the novel speed changer parking cam mechanism of one kind according to claim 1, it is characterized in that: the park pawl
The return torque of return torsional spring (4) is 6~7 times of park pawl (201) gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820889262.1U CN208845705U (en) | 2018-06-08 | 2018-06-08 | A kind of novel speed changer parking cam mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820889262.1U CN208845705U (en) | 2018-06-08 | 2018-06-08 | A kind of novel speed changer parking cam mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845705U true CN208845705U (en) | 2019-05-10 |
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ID=66352015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820889262.1U Active CN208845705U (en) | 2018-06-08 | 2018-06-08 | A kind of novel speed changer parking cam mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN208845705U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425277A (en) * | 2019-06-26 | 2019-11-08 | 南昌大学 | A kind of P gear parking mechanical system |
| CN112032299A (en) * | 2019-06-03 | 2020-12-04 | 沃尔沃汽车公司 | Parking lock device |
| CN114439937A (en) * | 2020-11-06 | 2022-05-06 | 上海汽车集团股份有限公司 | Parking mechanism |
-
2018
- 2018-06-08 CN CN201820889262.1U patent/CN208845705U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032299A (en) * | 2019-06-03 | 2020-12-04 | 沃尔沃汽车公司 | Parking lock device |
| US11371608B2 (en) | 2019-06-03 | 2022-06-28 | Volvo Car Corporation | Park lock arrangement |
| CN110425277A (en) * | 2019-06-26 | 2019-11-08 | 南昌大学 | A kind of P gear parking mechanical system |
| CN110425277B (en) * | 2019-06-26 | 2020-08-28 | 南昌大学 | P keeps off parking mechanical system |
| CN114439937A (en) * | 2020-11-06 | 2022-05-06 | 上海汽车集团股份有限公司 | Parking mechanism |
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