CN203743412U - Parking braking pawl for automatic transmission - Google Patents
Parking braking pawl for automatic transmission Download PDFInfo
- Publication number
- CN203743412U CN203743412U CN201320850222.3U CN201320850222U CN203743412U CN 203743412 U CN203743412 U CN 203743412U CN 201320850222 U CN201320850222 U CN 201320850222U CN 203743412 U CN203743412 U CN 203743412U
- Authority
- CN
- China
- Prior art keywords
- ratchet
- pawl
- parking braking
- automatic transmission
- cavity
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 abstract 3
- 208000010392 Bone Fractures Diseases 0.000 abstract 1
- 206010017076 Fracture Diseases 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- General Details Of Gearings (AREA)
Abstract
The utility model relates to a parking braking pawl for an automatic transmission. The parking braking pawl comprises a pawl head, a pawl body and a pawl tail. A pin hole is formed in the pawl, a cavity is formed in the portion, at the front end of the pin hole, of the pawl body, a reinforcing rib is arranged in the middle of the cavity, a torsional spring installation hole is formed in the reinforcing rib in a penetrating mode, the center of gravity of the pawl is located at the rear end of the pin hole, and abrasion is reduced. The thickness of the reinforcing rib is 2.54 mm, the stress borne in the weight balancing area of the pawl is small, the safety factor is high, and the fracture risk of the pawl is lowered.
Description
Technical field
The utility model relates to a kind of ratchet, is applicable to automatic transmission, specifically, relates to a kind of automatic transmission parking braking ratchet, belongs to automatic transmission parking braking technical field.
Background technique
In multi-speed automatic transmission, all need to have a parking braking system, in stopping, prevent that the gear of gearbox the inside from rotating, thereby prevent that car load from sliding.
At present, parking braking system adopts click structure, ratchet comprises ratchet head, ratchet tail and pawl body, ratchet is provided with pin-and-hole, pawl body between pin-and-hole and ratchet head is provided with two punchings, after endurance test, there is noticeable wear phenomenon in front end and the ratchet contact surface of finding ratchet head, find that by analysis ratchet center of gravity is positioned at ratchet front portion, be that ratchet center of gravity is between pin-and-hole and ratchet head, due to Action of Gravity Field, ratchet front portion overcomes torsion spring power, in vehicle traveling process, ratchet head constantly knocks ratchet, on uneven road surface, knock phenomenon particularly evident.In the course of time click serious wear.
In order to address this problem, technician improves ratchet, and as shown in Figure 1, described ratchet comprises ratchet head 1, pawl body 2 and ratchet tail 3, and ratchet is provided with pin-and-hole 4, is penetrated with cavity 5 in pawl body 2, makes the center of gravity of ratchet be positioned at pin-and-hole 4 rear ends.
Realizing in process of the present invention, inventor finds at least to have following problem in prior art, because ratchet front portion is by milling sky, in improper parking situation, there is the risk of ratchet fracture, as shown in Figure 2, find through force analysis, in weighted regions, the suffered stress of ratchet is 600-900MPa.
Model utility content
The technical problems to be solved in the utility model is for above deficiency, a kind of automatic transmission parking braking ratchet is provided, overcome the defect of ratchet easy-rupturing in prior art, adopted after ratchet of the present utility model, had advantages of that safety coefficient is high, not easy-rupturing of ratchet.
For solving above technical problem, the utility model by the following technical solutions: a kind of automatic transmission parking braking ratchet, described ratchet is provided with cavity, it is characterized in that: the middle part of described cavity is provided with stiffening rib.
A kind of optimized project, the thickness of described stiffening rib is 2.54mm.
Another kind of optimized project, described stiffening rib is provided with torsion spring mounting hole.
Another optimized project, the ratchet of described cavity rear end is provided with pin-and-hole.
Further optimized project, the center of gravity of described ratchet is positioned at the rear end of pin-and-hole.
Further optimized project, described ratchet comprises ratchet head, pawl body and ratchet tail.
Further optimized project, described cavity is positioned in pawl body.
The utility model adopts after above technological scheme, compared with prior art, has the following advantages: the pawl body of pin-and-hole front end is provided with cavity, cavity middle part is provided with stiffening rib, stiffening rib is provided with torsion spring mounting hole, and the center of gravity of ratchet is positioned at the rear end of pin-and-hole, reduces wear; The thickness of stiffening rib is 2.54mm, and in ratchet weighted regions, suffered stress is less, and safety coefficient is high, has reduced the risk of breakage of ratchet.
Below in conjunction with drawings and Examples, the utility model is elaborated.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of ratchet in prior art;
Accompanying drawing 2 is force analysis schematic diagram of ratchet in prior art;
Accompanying drawing 3 is structural representations of ratchet in the utility model embodiment;
Accompanying drawing 4 is sectional views of A-A face in accompanying drawing 3;
Accompanying drawing 5 is force analysis schematic diagram of ratchet in the utility model embodiment;
In figure,
1-ratchet head, 2-pawl body, 3-ratchet tail, 4-pin-and-hole, 5-cavity, 6-stiffening rib, 7-torsion spring mounting hole.
Embodiment
Embodiment 1, as shown in Figure 3 and Figure 4, a kind of automatic transmission parking braking ratchet, comprise ratchet head 1, pawl body 2 and ratchet tail 3, ratchet is provided with pin-and-hole 4, the pawl body 2 of pin-and-hole 4 front ends is provided with cavity 5, in order to reduce the risk of breakage of ratchet, the middle part of described cavity 5 is provided with stiffening rib 6, the thickness of stiffening rib 6 is 2.54mm, on described stiffening rib 6, be penetrated with torsion spring mounting hole 7, described torsion spring mounting hole 7 is for installing torsion spring, and the center of gravity of described ratchet is positioned at the rear end of pin-and-hole 4.
As shown in Figure 5, stressed, identical in the situation that, in the stress of ratchet head and prior art, the stress of ratchet head is basic identical, but in weighted regions, the stress of described ratchet is lower than 250MPa, and safety coefficient is high, not easy-rupturing.
The above is giving an example of the utility model preferred forms, and the part of wherein not addressing is in detail those of ordinary skill in the art's common practise.Protection domain of the present utility model is as the criterion with the content of claim, and any equivalent transformation carrying out based on technology enlightenment of the present utility model, also within protection domain of the present utility model.
Claims (7)
1. an automatic transmission parking braking ratchet, described ratchet is provided with cavity (5), it is characterized in that: the middle part of described cavity (5) is provided with stiffening rib (6).
2. a kind of automatic transmission parking braking ratchet as claimed in claim 1, is characterized in that: the thickness of described stiffening rib (6) is 2.54mm.
3. a kind of automatic transmission parking braking ratchet as claimed in claim 1, is characterized in that: described stiffening rib (6) is provided with torsion spring mounting hole (7).
4. a kind of automatic transmission parking braking ratchet as claimed in claim 3, is characterized in that: the ratchet of described cavity (5) rear end is provided with pin-and-hole (4).
5. a kind of automatic transmission parking braking ratchet as claimed in claim 4, is characterized in that: the center of gravity of described ratchet is positioned at the rear end of pin-and-hole (4).
6. a kind of automatic transmission parking braking ratchet as claimed in claim 1, is characterized in that: described ratchet comprises ratchet head (1), pawl body (2) and ratchet tail (3).
7. a kind of automatic transmission parking braking ratchet as claimed in claim 6, is characterized in that: described cavity (5) is positioned in pawl body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850222.3U CN203743412U (en) | 2013-12-23 | 2013-12-23 | Parking braking pawl for automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850222.3U CN203743412U (en) | 2013-12-23 | 2013-12-23 | Parking braking pawl for automatic transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743412U true CN203743412U (en) | 2014-07-30 |
Family
ID=51343213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320850222.3U Expired - Lifetime CN203743412U (en) | 2013-12-23 | 2013-12-23 | Parking braking pawl for automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743412U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697157A (en) * | 2013-12-23 | 2014-04-02 | 盛瑞传动股份有限公司 | Parking braking pawl of automatic gearbox |
| CN106884981A (en) * | 2015-11-17 | 2017-06-23 | 本田技研工业株式会社 | Parking locking device |
| CN106969140A (en) * | 2015-10-08 | 2017-07-21 | 本田技研工业株式会社 | The supporting structure of vehicle parking device and parking axle |
-
2013
- 2013-12-23 CN CN201320850222.3U patent/CN203743412U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697157A (en) * | 2013-12-23 | 2014-04-02 | 盛瑞传动股份有限公司 | Parking braking pawl of automatic gearbox |
| CN106969140A (en) * | 2015-10-08 | 2017-07-21 | 本田技研工业株式会社 | The supporting structure of vehicle parking device and parking axle |
| CN106969140B (en) * | 2015-10-08 | 2019-03-01 | 本田技研工业株式会社 | The supporting structure of vehicle parking device and parking axis |
| CN106884981A (en) * | 2015-11-17 | 2017-06-23 | 本田技研工业株式会社 | Parking locking device |
| US10415702B2 (en) | 2015-11-17 | 2019-09-17 | Honda Motor Co., Ltd. | Parking lock system |
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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 |
Granted publication date: 20140730 |
|
| CX01 | Expiry of patent term |