CN109296675B

CN109296675B - Double clutch

Info

Publication number: CN109296675B
Application number: CN201811508444.0A
Authority: CN
Inventors: 夏乐春; 蔡有建
Original assignee: Fujian Zhongqing Automobile Technology Co ltd
Current assignee: Fujian Zhongqing Automobile Technology Co ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-12-22
Anticipated expiration: 2038-12-11
Also published as: CN112815019A; CN112815018B; CN112815019B; CN112815018A; CN109296675A

Abstract

The invention belongs to the technical field of clutches, and particularly relates to a double clutch which is sleeved on a power shaft and comprises a first clutch, a second clutch and a control mechanism; the first clutch and the second clutch are sequentially sleeved on the power shaft; the control mechanism comprises a guide rail, an actuating element and a driving element, the guide rail is parallel to the power shaft, the actuating element comprises a sleeve, a first connecting rod and a second connecting rod, the sleeve is sleeved on the guide rail, one end of the first connecting rod is connected with the sleeve, the other end of the first connecting rod is connected with the first clutch, one end of the second connecting rod is connected with the sleeve, and the other end of the second connecting rod is connected with the second clutch; the driving element is used for driving the actuating element to axially move on the guide rail. The double clutch provided by the invention can realize linkage switching between the two clutches by operating one control mechanism, and avoids complex hydraulic execution and control mechanisms.

Description

Double clutch

Technical Field

The invention belongs to the technical field of clutches, and particularly relates to a double clutch.

Background

The automatic transmission is taken as a core component of automobiles and other mechanical transmission devices, and AT present, four main types of AMT, AT, DCT and CVT are mainly provided. DCT is the abbreviation of Dual Clutch Transmission in English, and Chinese is directly translated into a Dual Clutch Transmission. The operating principle of a DCT gearbox can be simply understood as one clutch corresponding to odd gears and the other clutch corresponding to even gears. When the vehicle is engaged in one gear, the other clutch and the corresponding next gear are already in the ready state and the next gear can be engaged immediately as long as the current gear is disengaged. The double-clutch gearbox cancels components such as a hydraulic torque converter and the like, and has the advantages of high transmission efficiency, low cost and the like compared with other types of automatic transmissions such as AT and the like; compared with AMT, it has the advantages of fast shift speed and smooth shift process.

The DCT core is a dual clutch. The separation and combination actions of the double clutches of most of the existing DCT are executed by two sets of independent control mechanisms and are controlled by an automatic hydraulic system. The invention of the present domestic publication No. CN103133558B discloses a dual clutch having a single clutch, a friction clutch, a clutch housing and two piston-cylinder units, the clutch housing is connected to or integrated with an input friction plate carrier arranged externally with respect to the friction clutch, the clutch housing can be connected to a first transmission input shaft via an inner output friction plate carrier of a first friction clutch and can be connected to a second transmission input shaft via an inner output friction plate carrier of a second friction clutch, the piston-cylinder units of the two friction clutches are arranged between the friction clutches in the axial direction of the dual clutch and in the radial direction of the friction clutches in the diameter region of the friction plates or friction plate sets of the single clutch, such that the actuating force direction of one of the piston-cylinder units is in the direction of the drive and the actuating force direction of the other piston-cylinder unit is in the direction of the transmission The line of action of the actuating force is arranged in the diameter region of the friction disk or friction disk pack of the single clutch.

The hydraulic mechanism of the invention has complex control and high component cost, and needs to consume partial power; and the clutch is normally open, and the during operation just need compress tightly when transmitting power promptly to the packing force needs accurate control, and the condition that the friction disc warp appears easily too big, and not enough then can lead to skidding, and the adjustment is very difficult after the friction disc wearing and tearing.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the double clutches are provided, linkage switching between the two clutches can be realized only by one clutch control mechanism, and complex hydraulic execution and control mechanisms are avoided.

In order to solve the technical problems, the invention adopts the technical scheme that: a double clutch is sleeved on a power shaft and comprises a first clutch, a second clutch and a control mechanism;

the first clutch and the second clutch are sequentially sleeved on the power shaft;

the control mechanism comprises a guide rail, an actuating element and a driving element, the guide rail is parallel to the power shaft, the actuating element comprises a sleeve, a first connecting rod and a second connecting rod, the sleeve is sleeved on the guide rail, one end of the first connecting rod is connected with the sleeve, the other end of the first connecting rod is connected with the first clutch, one end of the second connecting rod is connected with the sleeve, and the other end of the second connecting rod is connected with the second clutch;

the driving element is used for driving the actuating element to axially move on the guide rail.

The first clutch comprises a clutch shell and a central disc, a first output gear and a driven friction plate are arranged on the clutch shell, the first output gear is fixedly connected with the clutch shell and is sleeved on the power shaft in a hollow mode, and the driven friction plate is arranged on the inner circumferential surface of the clutch shell; the center plate is fixedly connected with the power shaft, an active friction plate is arranged on the outer circumferential surface of the center plate, the second clutch is the same as the first clutch in structure, a second output gear is fixedly connected to a clutch shell of the second clutch, and the second output gear is sleeved on the power shaft in a hollow mode.

Wherein, be equipped with pressure disk, pressure spring, release bearing and liter board on the center disk, the pressure disk is worn to locate on the center disk, the one end of pressure spring with the pressure disk is connected, the other end with the center disk is connected, release bearing empty cover is in on the power shaft, the release bearing of first clutch with the one end of first connecting rod is connected, the release bearing of second clutch with the one end of second connecting rod is connected, the one end of liter board with pressure disk fixed connection, the other end with release bearing fixed connection.

The power shaft is connected with the central discs of the first clutch and the second clutch through splines and used as power input of the clutches.

Wherein, the driving element is a cylinder or an electric screw rod.

The driving friction plate and the driven friction plate are multiple and alternately arranged.

One end of the pressure plate is provided with a threaded hole, and the pressure plate is fixedly connected with the lifting plate through a screw.

The first output gear and the second output gear are respectively connected with the power shaft in a rotating mode through rolling bearings.

The double clutch is characterized in that an outer box body is further arranged outside the double clutch, two ends of the guide rail are fixedly connected with the outer box body, and one end of the power shaft extends out of a shaft hole in the outer box body.

The power shaft is connected with the outer box body through a bearing, and an annular sealing ring is arranged on a shaft hole of the outer box body.

The invention has the beneficial effects that: the double clutch provided by the invention can realize linkage switching between the two clutches by operating one control mechanism, and avoids complex hydraulic execution and control mechanisms, thereby realizing the advantages of low manufacturing cost, high reliability, light weight, small number of parts, simple maintenance and the like, greatly enhancing the application range of the double clutches, and being suitable for being carried on mechanical devices with strict weight and cost control, such as electric vehicles, small-sized automobiles, motorcycles and the like.

Drawings

Fig. 1 is a schematic structural view of a dual clutch according to an embodiment of the present invention;

FIG. 2 is a side view of the guide rails and actuators of the dual clutch of the present embodiment of the invention in cooperation;

description of reference numerals:

1. a power shaft;

2. a first clutch; 21. a clutch housing; 211. a first output gear; 212. a driven friction plate; 22. a central disk; 221. an active friction plate; 222. a platen; 223. a pressure spring; 224. separating the bearing;

225. lifting the plate;

3. a second clutch; 31. a second output gear;

4. a control mechanism; 41. a guide rail; 42. an actuator; 421. a sleeve; 422. a first link;

423. a second link;

5. an outer case; 51. an annular seal ring.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The most key concept of the invention is as follows: the linkage switching between the two clutches can be realized by operating one control mechanism, and the complex hydraulic execution and control mechanism is avoided.

Referring to fig. 1 and 2, the dual clutch of the present invention is sleeved on a power shaft 1, and includes a first clutch 2, a second clutch 3 and a control mechanism 4;

the first clutch 2 and the second clutch 3 are sequentially sleeved on the power shaft 1;

the control mechanism 4 comprises a guide rail 41, an actuating element 42 and a driving element, the guide rail 41 is parallel to the power shaft 1, the actuating element 42 comprises a sleeve 421, a first connecting rod 422 and a second connecting rod 423, the sleeve 421 is sleeved on the guide rail 41, one end of the first connecting rod 422 is connected with the sleeve 421, the other end of the first connecting rod 422 is connected with the first clutch 2, one end of the second connecting rod 423 is connected with the sleeve 421, and the other end of the second connecting rod 423 is connected with the second clutch 3;

the drive element is used to drive the actuator 42 axially on the guide rail 41.

Preferably, the free ends of the first connecting rod and the second connecting rod are both provided with a U-shaped groove, and the width of the U-shaped groove is larger than the diameter of the power shaft.

Preferably, the first clutch 2 and the second clutch 3 may adopt all-existing clutch structures, including wet and dry clutches;

preferably, by changing the stroke of the pressure plate, the stroke of the clutch for separating and combining is set, and various modes of non-power interruption output or intermediate neutral output can be realized;

the working process of the double clutch is as follows: when the clutch is operated, the actuating element 42 is controlled by the driving element, so that the actuating element 42 axially moves on the guide rail 41, when the sleeve 421 of the actuating element 42 moves on the guide rail 41, the first connecting rod 422 and the second connecting rod 423 which are connected with the sleeve 421 drive the first clutch 2 and the second clutch 3 to alternately engage or disengage on the power shaft 1, and when the first clutch 2 is engaged, the second clutch 3 is disengaged, and at the moment, power is transmitted by the first clutch 2; when the second clutch 3 is engaged, the first clutch 2 is disengaged, and power is transmitted by the second clutch 3.

As can be seen from the above description, the beneficial effects of the present invention are: the double clutch provided by the invention can realize linkage switching between the two clutches by operating one control mechanism, and avoids complex hydraulic execution and control mechanisms, thereby realizing the advantages of low manufacturing cost, high reliability, light weight, small number of parts, simple maintenance and the like, greatly enhancing the application range of the double clutches, and being suitable for being carried on mechanical devices with strict weight and cost control, such as electric vehicles, small-sized automobiles, motorcycles and the like.

Further, the first clutch 2 includes a clutch housing 21 and a central disc 22, the clutch housing 21 is provided with a first output gear 211 and a driven friction plate, the first output gear 211 is fixedly connected with the clutch housing 21 and is sleeved on the power shaft 1, and the driven friction plate is arranged on the inner circumferential surface of the clutch housing 21; the central disc 22 is fixedly connected with the power shaft 1, an active friction plate 221 is arranged on the outer circumferential surface of the central disc 22, the second clutch 3 and the first clutch 2 are identical in structure, a second output gear 31 is fixedly connected to a clutch shell of the second clutch 3, and the second output gear 31 is sleeved on the power shaft 1 in a hollow mode.

From the above description, it can be known that, through the arrangement of the clutch housing and the central disk, the power input and output of the clutch are all completed on one shaft, the structure of the clutch is simplified to the maximum extent, and the volume of the clutch is further reduced.

Further, be equipped with pressure disk 222, pressure spring 223, release bearing 224 and liter board 225 on the center disk 22, pressure disk 222 wears to locate on the center disk 22, the one end of pressure spring 223 with pressure disk 222 is connected, the other end with center disk 22 is connected, release bearing 224 empty cover in on the power shaft 1, the release bearing of first clutch 2 with the one end of first connecting rod 422 is connected, the release bearing of second clutch 3 with the one end of second connecting rod 423 is connected, the one end of liter board 225 with pressure disk 222 fixed connection, the other end with release bearing 224 fixed connection.

From the above description, through the design of the central disc containing the compression spring, the clutch has a normally closed structure, the working pressing force between the friction plates is generated by the compression spring, the requirement on the operation precision of the control mechanism is low, and the phenomenon that the friction plates deform or slip due to the fact that the pressing force is too large or too small is avoided.

Further, the power shaft 1 is spline-connected to the center plates 22 of the first clutch 2 and the second clutch 3, and is used as a power input of the clutches.

Further, the driving element is a cylinder or an electric screw rod.

Preferably, the drive mechanism may be a hydraulic cylinder, a cable, or the like.

According to the above description, the cylinder and the electric screw rod are selected as the executing element, so that the maintenance and the curing are convenient, the cylinder and the electric screw rod are common, the structure is simple, and the cost is low.

Further, the driving friction plate 221 and the driven friction plate are multiple and alternately arranged.

As can be seen from the above description, the friction plates alternately arranged have more stable transmission performance than the friction plates in single contact.

Further, one end of the pressure plate 222 is provided with a threaded hole, and the pressure plate 222 is fixedly connected with the lifting plate 225 through a screw.

As can be seen from the above description, by using screws to connect the lifting plate and the pressure plate, the axial movement of the pressure plate and the adjustment of the pressing force of the pressure spring can be realized.

Further, the first output gear 211 and the second output gear 31 are respectively connected with the power shaft 1 through rolling bearings in a rotating manner.

According to the description, the output gear is ensured not to generate friction with the power shaft in the rotating process through the rolling bearing, and the rolling bearing is high in precision, large in load, small in abrasion and long in service life.

Further, the outer part of the double clutch is further provided with an outer box body 5, two ends of the guide rail 41 are fixedly connected with the outer box body 5, and one end of the power shaft 1 extends out of a shaft hole in the outer box body 5.

As can be seen from the above description, the arrangement of the outer box body can play a good role in protecting the clutch and the control mechanism inside.

Further, the power shaft 1 is connected with the outer box 5 through a bearing, and an annular sealing ring 51 is arranged on a shaft hole of the outer box 5.

As can be seen from the above description, through the arrangement of the ring-shaped sealing ring, a sealed space is formed inside the outer box body, and impurities in the external environment are prevented from entering.

The first embodiment is as follows:

a double clutch is sleeved on a power shaft 1 and comprises a first clutch 2, a second clutch 3 and a control mechanism 4; the first clutch 2 and the second clutch 3 are sequentially sleeved on the power shaft 1; the control mechanism 4 comprises a guide rail 41, an actuating element 42 and a driving element, the guide rail 41 is parallel to the power shaft 1, the actuating element 42 comprises a sleeve 421, a first connecting rod 422 and a second connecting rod 423, the sleeve 421 is sleeved on the guide rail 41, one end of the first connecting rod 422 is connected with the sleeve 421, the other end of the first connecting rod 422 is connected with the first clutch 2, one end of the second connecting rod 423 is connected with the sleeve 421, and the other end of the second connecting rod 423 is connected with the second clutch 3; the driving element is used for driving the actuating element 42 to axially move on the guide rail 41;

the first clutch 2 comprises a clutch outer shell 21 and a central disc 22, a first output gear 211 and a driven friction plate are arranged on the clutch outer shell 21, the first output gear 211 is fixedly connected with the clutch outer shell 21 and is sleeved on the power shaft 1 in a hollow mode, and the driven friction plate is arranged on the inner circumferential surface of the clutch outer shell 21; the central disc 22 is fixedly connected with the power shaft 1, an active friction plate 221 is arranged on the outer circumferential surface of the central disc 22, the second clutch 3 and the first clutch 2 have the same structure, a second output gear 31 is fixedly connected to a clutch shell of the second clutch 3, and the second output gear 31 is sleeved on the power shaft 1 in a hollow manner; a pressure plate 222, a pressure spring 223, a release bearing 224 and a lifting plate 225 are arranged on the central disc 22, the pressure plate 222 is arranged on the central disc 22 in a penetrating manner, one end of the pressure spring 223 is connected with the pressure plate 222, the other end of the pressure spring 223 is connected with the central disc 22, the release bearing 224 is sleeved on the power shaft 1 in a hollow manner, the release bearing of the first clutch 2 is connected with one end of the first connecting rod 422, the release bearing of the second clutch 3 is connected with one end of the second connecting rod 423, one end of the lifting plate 225 is fixedly connected with the pressure plate 222, and the other end of the lifting plate 225 is fixedly connected with the release bearing 224;

the power shaft 1 is connected with the center plates 22 of the first clutch 2 and the second clutch 3 through splines and used as power input of the clutches. The driving element is a cylinder. The driving friction plates 221 and the driven friction plates are seven and are alternately arranged. One end of the pressure plate 222 is provided with a threaded hole, and the pressure plate 222 is fixedly connected with the lifting plate 225 through a screw. The first output gear 211 and the second output gear 31 are respectively connected with the power shaft 1 in a rotating manner through rolling bearings. The outside of double clutch still is equipped with outer box 5, the both ends of guide rail 41 with outer box 5 fixed connection, the one end of power shaft 1 by shaft hole on the outer box 5 stretches out. The power shaft 1 is connected with the outer box body 5 through a bearing, and an annular sealing ring 51 is arranged on a shaft hole of the outer box body 5.

When power is transmitted, the power shaft drives the central disc of the clutch and the driving friction plate on the central disc to rotate; when one of the clutches is in a combined state, the driving friction plate and the driven friction plate are combined into a whole through pressing force of a pressure spring acting on the pressure plate, so that power is transmitted to the clutch shell from the central plate, and the output gear fixedly connected with the clutch shell outputs power outwards;

in the gear shifting process, the cylinder pushes the sleeve to move axially along the guide rail, so that a lifting plate of one clutch is pushed through the connecting rod and the release bearing, the lifting plate overcomes the resistance of the pressure spring to push away the pressure plate, so that the driving friction plate and the driven friction plate are separated, and the clutch is separated; meanwhile, the other clutch release bearing is separated from the lifting plate under the pushing of the other connecting rod, so that the pressure spring is loosened, the pressure spring pushes the pressure plate to press the driving friction plate and the driven friction plate, and the clutch is combined to realize power output. The two clutches alternately output power in the process of moving the clutch control mechanism left and right.

In conclusion, the double clutch provided by the invention can realize linkage switching between the two clutches by operating one control mechanism, and avoids complex hydraulic execution and control mechanisms, thereby realizing the advantages of low manufacturing cost, high reliability, light weight, small number of parts, simple maintenance and the like, greatly enhancing the application range of the double clutches, and being suitable for being carried on mechanical devices with strict weight and cost control, such as electric vehicles, small-sized automobiles, motorcycles and the like; through the arrangement of the clutch shell and the central disc, the power input and output of the clutch are completed on one shaft, so that the structure of the clutch is simplified to the maximum extent, and the volume of the clutch is further reduced; through the design of the central disc containing the pressure spring, the clutch has a normally closed structure, the working pressing force between the friction plates is generated by the pressure spring, the requirement on the operation precision of a control mechanism is low, and therefore the phenomenon that the friction plates deform or slip due to overlarge or undersize pressing force is avoided; the air cylinder and the electric screw rod are selected as the executing elements, so that the maintenance and the curing are convenient, the air cylinder and the electric screw rod are common, the structure is simple, and the cost is low; through the friction plates which are alternately arranged, compared with the friction plates which are in single contact, the transmission performance is more stable; the screw is adopted to connect the lifting plate and the pressure plate, so that the axial movement of the pressure plate and the adjustment of the pressing force of the pressure spring can be realized; by using the rolling bearing, the output gear is ensured not to generate friction with the power shaft in the rotating process, and the rolling bearing has high precision, large load, small abrasion and long service life; the arrangement of the outer box body can play a good role in protecting the clutch and the control mechanism inside; through the setting of ring type seal, the inside confined space that forms of outer box prevents external environment's impurity entering.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. A double clutch is sleeved on a power shaft and is characterized by comprising a first clutch, a second clutch and a control mechanism;

2. The dual clutch of claim 1, wherein the first clutch comprises a clutch housing and a central disc, the clutch housing is provided with a first output gear and a driven friction plate, the first output gear is fixedly connected with the clutch housing and is sleeved on the power shaft, and the driven friction plate is arranged on the inner circumferential surface of the clutch housing; the center plate is fixedly connected with the power shaft, an active friction plate is arranged on the outer circumferential surface of the center plate, the second clutch is the same as the first clutch in structure, a second output gear is fixedly connected to a clutch shell of the second clutch, and the second output gear is sleeved on the power shaft in a hollow mode.

3. The double clutch of claim 2, wherein a pressure plate, a pressure spring, a release bearing and a lifting plate are disposed on the center plate, the pressure plate is disposed on the center plate, one end of the pressure spring is connected to the pressure plate, the other end of the pressure spring is connected to the center plate, the release bearing is sleeved on the power shaft, the release bearing of the first clutch is connected to one end of the first connecting rod, the release bearing of the second clutch is connected to one end of the second connecting rod, one end of the lifting plate is fixedly connected to the pressure plate, and the other end of the lifting plate is fixedly connected to the release bearing.

4. The dual clutch of claim 1, wherein the power shaft is splined to the center plates of the first and second clutches as a power input to the clutches.

5. The dual clutch according to claim 1, wherein the driving element is a cylinder or an electric screw.

6. The dual clutch as claimed in claim 2, wherein the driving friction plate and the driven friction plate are a plurality of plates and are alternately arranged.

7. The dual clutch as claimed in claim 3, wherein one end of the pressure plate is provided with a threaded hole, and the pressure plate is fixedly connected with the lifting plate through a screw.

8. The dual clutch as claimed in claim 2, wherein the first output gear and the second output gear are each rotationally connected to the power shaft by a rolling bearing.

9. The double clutch of claim 1, wherein an outer box is further disposed outside the double clutch, two ends of the guide rail are fixedly connected with the outer box, and one end of the power shaft extends out of a shaft hole in the outer box.

10. The dual clutch of claim 9, wherein the power shaft is connected to the outer housing through a bearing, and an annular seal ring is disposed in a shaft hole of the outer housing.