CN202646459U - Automatic transmission clutch and resetting mechanism of piston thereof - Google Patents
Automatic transmission clutch and resetting mechanism of piston thereof Download PDFInfo
- Publication number
- CN202646459U CN202646459U CN 201220332263 CN201220332263U CN202646459U CN 202646459 U CN202646459 U CN 202646459U CN 201220332263 CN201220332263 CN 201220332263 CN 201220332263 U CN201220332263 U CN 201220332263U CN 202646459 U CN202646459 U CN 202646459U
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- China
- Prior art keywords
- piston
- automatic transmission
- clutch
- gear box
- box casing
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- 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
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Abstract
The utility model provides an automatic transmission clutch and a resetting mechanism of a piston thereof. The automatic transmission clutch comprises a gearbox shell, a resetting elastic component fixedly arranged on the gearbox shell, a piston arranged between the gearbox shell and the resetting elastic component, a clutch sheet group arranged between the gearbox shell and the piston, and a friction sheet holding frame arranged between the clutch sheet group and the gearbox shell. When hydraulic oil enters a cavity at one side of the piston through an oil path of the gearbox shell, the piston moves to a first direction under the action of the hydraulic oil, and the clutch sheet group is tightly pressed, and the resetting elastic component is compressed, so that the friction sheet holding frame and the gearbox sheet are fixedly connected together due to a friction force generated by the clutch sheet group. Therefore, an axial size of an entire resetting mechanism is reduced, so that the clutch assembly is more compact. With the adoption of the technical scheme provided by the utility model, the hydraulic pressure of the clutch can be reduced, and the entire efficiency of the clutch is improved.
Description
Technical field
The utility model relates to the automotive transmission field, refers to especially the return mechanism of a kind of automatic transmission clutch and piston thereof.
Background technique
The at present development of automobile is that the structure of requirement speed changer is more and more compacter, and correspondingly, clutch also needs compacter and compact in size.As shown in Figure 1, automatic transmission clutch piston return mechanism mainly by helical spring control, is determined by helical spring structure and elasticity coefficient at present, causes the axial dimension of piston return mechanism larger.And because helical spring power and deformation curve are linear relationships, so the spring force that need overcome when piston does work is larger, increased hydraulic pressure.
The model utility content
The technical problems to be solved in the utility model provides the return mechanism of a kind of automatic transmission clutch and piston thereof, can reduce the axial dimension of the return mechanism of automatic transmission clutch piston, thereby so that the automatic transmission clutch assembly structure is compacter.
For solving the problems of the technologies described above, embodiment of the present utility model provides technological scheme as follows:
On the one hand, provide a kind of return mechanism of automatic transmission clutch piston, comprising:
Gear box casing;
Be fixed on the return elastic member on the described gear box casing;
Be arranged on the piston between described gear box casing and the described return elastic member;
Be arranged on the clutch plate group between described gear box casing and the described piston;
Be arranged on the friction plate retainer between described clutch plate group and the described gear box casing;
When the oil duct of hydraulic oil by described gear box casing enters the cavity of described piston one side, described piston moves to first direction under the effect of described hydraulic oil, compress described clutch plate group and compress described return elastic member, the frictional force that produces by the clutch plate group is fixed together described friction plate retainer and described gear box casing.
Further, the return mechanism of described automatic transmission clutch piston also comprises:
Be fixed on the return elastic member snap ring on the described gear box casing;
Described return elastic member is fixed on the described gear box casing by described return elastic member snap ring.
Further, described return elastic member is belleville spring.
Further, the axial dimension sum of described belleville spring and described return elastic member snap ring is not more than 9mm.
Further, the axial dimension sum of belleville spring and described return elastic member snap ring is 8.7mm.
Further, the return mechanism of described automatic transmission clutch piston also comprises:
Be fixed on the clutch plate snap ring on the described gear box casing;
Described clutch plate group is fixed on the described gear box casing by described clutch plate snap ring.
The utility model also provides a kind of automatic transmission clutch, comprises the return mechanism of aforesaid automatic transmission clutch piston.
Embodiment of the present utility model has following beneficial effect:
The return mechanism of automatic transmission clutch piston of the present utility model adopts said structure can effectively reduce the axial dimension of clutch plunger return mechanism, thereby makes the automatic transmission clutch assembly structure compacter.
Description of drawings
Fig. 1 is the structural representation of automatic transmission clutch piston return mechanism of the prior art;
Fig. 2 is the structural representation of the return mechanism of automatic transmission clutch piston of the present utility model;
Fig. 3 is the schematic representation that concerns between the power of belleville spring and the spring deformation.
Reference character
1 belleville spring
2 pistons
3 clutch plate groups
4 return spring snap rings
5 clutch plate snap rings
6 friction plate retainers
7 gear box casings
Embodiment
For technical problem, technological scheme and advantage that embodiment of the present utility model will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment of the present utility model is for the larger problem of axial dimension of piston return mechanism in the prior art, the return mechanism of a kind of automatic transmission clutch and piston thereof is provided, can reduce the axial dimension of the return mechanism of automatic transmission clutch piston, thereby so that the automatic transmission clutch assembly structure is compacter.
Figure 2 shows that the structural representation of the return mechanism of automatic transmission clutch piston of the present utility model, as shown in Figure 2, the return mechanism of the automatic transmission clutch piston of present embodiment comprises:
Gear box casing 7;
Be fixed on the return elastic member 1 on the gear box casing 7;
Be arranged on the piston 2 between gear box casing 7 and the return elastic member 1;
Be arranged on the clutch plate group 3 between gear box casing 7 and the piston 2;
Be arranged on the friction plate retainer 6 between clutch plate group 3 and the gear box casing 7;
When the oil duct of hydraulic oil by gear box casing 7 enters the cavity of piston 2 one sides, piston 2 moves to first direction under the effect of hydraulic oil, compress clutch plate group 3 and compression return elastic member 1, the frictional force that produces by clutch plate group 3 is fixed together friction plate retainer 6 and gear box casing 7.
Further, return elastic member 1 can be selected belleville spring.
Further, the return mechanism of automatic transmission clutch piston also comprises:
Be fixed on the return elastic member snap ring 4 on the gear box casing 7;
Return elastic member 1 is fixed on the gear box casing 7 by return elastic member snap ring 4, and particularly, return elastic member snap ring 4 can be the return spring snap ring.
Further, the return mechanism of automatic transmission clutch piston also comprises:
Be fixed on the clutch plate snap ring 5 on the gear box casing 7;
Clutch plate group 3 is fixed on the gear box casing 7 by clutch plate snap ring 5.
Further, the axial dimension sum of belleville spring and return elastic member snap ring is not more than 9mm, and particularly, the axial dimension sum of belleville spring and return elastic member snap ring is 8.7mm.So largely reduced the axial dimension of the return mechanism of whole automatic transmission clutch piston, thereby made the automatic transmission clutch assembly structure compacter.
The utility model also provides a kind of automatic transmission clutch, comprises the return mechanism of aforesaid automatic transmission clutch piston.
Below in conjunction with Fig. 2 the working procedure of the return mechanism of automatic transmission clutch piston of the present utility model is further introduced:
At first hydraulic oil enters piston 2 right side cavitys by the oil duct of gear box casing 7, thereby piston 2 is moved to the left the acting state that enters, position-limiting action by return spring snap ring 4 and clutch plate snap ring 5, along with increasing of hydraulic oil, the pressure that hydraulic oil produces increases, piston 2 compresses clutch plate group 3 and compression belleville spring 1, by the interior external tooth of clutch plate group 3, friction plate retainer 6 and gear box casing 7 is fixed together by the frictional force that clutch plate group 3 produces; When friction plate retainer 6 need to separate with gear box casing 7, unloading hydraulic oil, minimizing along with hydraulic oil, the pressure that hydraulic oil produces reduces, the spring force acting pushing piston 2 that this moment, piston 2 compression belleville springs 1 produced is got back to initial position, clutch plate group 3 is separated, and friction plate retainer 6 separates with gear box casing 7.
Figure 3 shows that the schematic representation that concerns between the power of belleville spring and the spring deformation, as seen in Figure 3, it is nonlinear curve that the power of belleville spring and spring deformation close, (in the space that namely piston does work to clutch friction plate under the pressure control that hydraulic oil produces) spring force curve is almost level in belleville spring begins compressed one section space, and the power value of the spring force of belleville spring does not significantly increase; In the next just significantly increase of power value of the compression volume inner spring power of belleville spring, play the effect that piston 2 is produced returning place forces.
Because it is nonlinear curve that the power of belleville spring and spring deformation close, the spring force that need overcome in the time of can reducing like this piston acting, thus can reduce the hydraulic pressure of clutch, improve the clutch whole efficiency.
And because the power of belleville spring and spring deformation pass are this characteristic of nonlinear curve, adopt belleville spring as return spring, so that the axial dimension of return spring can be less as return spring than adopting helical spring, in the present embodiment, belleville spring 1 can only be 8.7mm together with the axial dimension sum of return spring snap ring 4, reduced significantly the axial dimension of the return mechanism of automatic transmission clutch piston, made clutch assembly compacter.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. the return mechanism of an automatic transmission clutch piston is characterized in that, comprising:
Gear box casing;
Be fixed on the return elastic member on the described gear box casing;
Be arranged on the piston between described gear box casing and the described return elastic member;
Be arranged on the clutch plate group between described gear box casing and the described piston;
Be arranged on the friction plate retainer between described clutch plate group and the described gear box casing;
When the oil duct of hydraulic oil by described gear box casing enters the cavity of described piston one side, described piston moves to first direction under the effect of described hydraulic oil, compress described clutch plate group and compress described return elastic member, the frictional force that produces by the clutch plate group is fixed together described friction plate retainer and described gear box casing.
2. the return mechanism of automatic transmission clutch piston according to claim 1 is characterized in that, the return mechanism of described automatic transmission clutch piston also comprises:
Be fixed on the return elastic member snap ring on the described gear box casing;
Described return elastic member is fixed on the described gear box casing by described return elastic member snap ring.
3. the return mechanism of automatic transmission clutch piston according to claim 2 is characterized in that, described return elastic member is belleville spring.
4. the return mechanism of automatic transmission clutch piston according to claim 3 is characterized in that, the axial dimension sum of described belleville spring and described return elastic member snap ring is not more than 9mm.
5. the return mechanism of automatic transmission clutch piston according to claim 4 is characterized in that, the axial dimension sum of described belleville spring and described return elastic member snap ring is 8.7mm.
6. the return mechanism of automatic transmission clutch piston according to claim 2 is characterized in that, the return mechanism of described automatic transmission clutch piston also comprises:
Be fixed on the clutch plate snap ring on the described gear box casing;
Described clutch plate group is fixed on the described gear box casing by described clutch plate snap ring.
7. an automatic transmission clutch is characterized in that, comprises the return mechanism such as each described automatic transmission clutch piston among the claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332263 CN202646459U (en) | 2012-07-09 | 2012-07-09 | Automatic transmission clutch and resetting mechanism of piston thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332263 CN202646459U (en) | 2012-07-09 | 2012-07-09 | Automatic transmission clutch and resetting mechanism of piston thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646459U true CN202646459U (en) | 2013-01-02 |
Family
ID=47415571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332263 Expired - Lifetime CN202646459U (en) | 2012-07-09 | 2012-07-09 | Automatic transmission clutch and resetting mechanism of piston thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646459U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587786A (en) * | 2014-11-11 | 2016-05-18 | 现代自动车株式会社 | Return Spring Common Structure Of Automatic Transmission |
| CN110431327A (en) * | 2016-12-22 | 2019-11-08 | 达纳比利时股份有限公司 | Wet clutch assembly |
-
2012
- 2012-07-09 CN CN 201220332263 patent/CN202646459U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587786A (en) * | 2014-11-11 | 2016-05-18 | 现代自动车株式会社 | Return Spring Common Structure Of Automatic Transmission |
| CN110431327A (en) * | 2016-12-22 | 2019-11-08 | 达纳比利时股份有限公司 | Wet clutch assembly |
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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: 20130102 |
|
| CX01 | Expiry of patent term |