KR100823206B1 - Clutch and brake actuator in autotransmission - Google Patents

Abstract

A clutch and a brake actuator of an automatic transmission are provided to reduce the number of elements and to reduce size of the automatic transmission. A clutch and a brake actuator of an automatic transmission comprises an inlet hub(10), an outlet retainer(11), an inner lace(12), and outer lace(13), a ring-clutch(14), a disk set(17), and a disk type piston(18). The inlet hub and the outlet retainer are aligned at inner part and the outer part of concentric circle of the automatic transmission respectively. The inner lace and the outer lace are interposed between the tub and the retainer to transmit power. The ring-clutch is interposed between the inner lace and the outer lace to connect or disconnect the power. One part of the disk set is fixed to a case(15) and the other part of the disk set is engaged with a periphery of the retainer, and selectively strains movement of the retainer by adhering ore separating to the retainer in accordance with motion of a piston(16). One part of the disk type piston is moved with the disk set and the other end is extended to an inner part of the automatic transmission through a groove of the retainer to selectively operate the ring-clutch.

Description

Clutch and brake actuator in autotransmission

1A and 1B are schematic views showing an example of clutch and brake action in an automatic transmission

Figure 2 is a cross-sectional view showing the operation member for the clutch and brake according to an embodiment of the present invention

Figure 3 is a perspective view showing a retainer in the operating member for clutch and brake according to an embodiment of the present invention

Figure 4 is a perspective view showing a disk-shaped piston in the operating member for clutch and brake according to an embodiment of the present invention

5 is a cross-sectional view showing an example of the clutch operation in the clutch and brake operating member according to an embodiment of the present invention.

6 is a cross-sectional view showing an example of the brake operation in the clutch and brake operating member according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 hub 11: retainer

12: inner race 13: outer race

14 ring ring clutch 15 case

16: piston 17: disc set

18: disc type piston 19: clutch body

20: spring 21: spring retainer

22: body 23: groove

24: pin

The present invention relates to an operation member for a clutch and a brake of an automatic transmission. More particularly, by implementing an assembly that performs both a clutch action and a brake action, the number of parts can be reduced, thereby enabling an automatic transmission. It relates to an operating member for the clutch and brake of the.

In general, the transmission of the vehicle is installed between the clutch and the propulsion shaft to increase or decrease the rotational force of the engine according to the change in the driving state of the vehicle and to allow the vehicle to travel backward. It is largely classified into an automatic transmission that automatically controls the gear shift speed using a controller such as a transmission and a TCU.

The automatic transmission includes brakes for controlling the operation of a plurality of clutches and planetary gear units built into the housing for clutch operation and shift operation, and hydraulic controls for controlling the friction elements using hydraulic pressure and torque change during shifting. Suppression and speed of shift

It is made of a one-way clutch and the like to improve the gear shifting feeling such as the shaft.

Here, the brake receives the output of the engine from the torque converter and arranges the gears which are always engaged in order to convert them to the proper rotation speed and torque, and to obtain the predetermined rotation ratio through the gears. Are selectively operated by friction elements such as the clutch and the brake.

In addition, the one-way clutch is characterized in that the rotating body capable of rotating in both directions is possible to rotate in one direction but impossible to rotate in the other direction by a mechanical structure.

That is, the one-way clutch is installed between the inner and outer shafts coupled to the same shaft in the automatic transmission, and the one-way clutch restricts rotation in the opposite direction instead of allowing rotation only in the forward direction with respect to the inner and outer shafts, respectively. do.

The one-way clutch serves as a brake when mounted to the stationary element, and as a clutch when connected to the actuating element.

1A and 1B are schematic views showing an example of clutch and brake action in an automatic transmission.

Mainly used in the sub transmission part of the automatic transmission, it is a structure that transmits by decelerating or transmitting 1: 1 power from the hub.

As shown in FIG. 1A, the multi-plate clutch 100, the band brake 110, and the one-way clutch 120 are configured or the one-way clutch is omitted as illustrated in FIG. 1B.

Here, reference numerals 130 and 140 denote multi-plate brakes and hubs, respectively.

Thus, when the brake is actuated and the clutch is released, the speed is reduced by the ratio of the connected gears, and when the clutch is actuated and the brake is released, an output of the same speed as the input is generated.

However, the conventional configuration for clutch and brake operation as described above, although the clutch and brake two elements operate in correlation with each other, it requires a lot of space as each of the operating elements are configured separately.

As a result, the design freedom is reduced, because of limitations in terms of space related to the arrangement of components inside the transmission.

Accordingly, the present invention has been made in view of the above, and by implementing a new type of clutch and brake assembly that selectively performs both the clutch action and the brake action, the number of components can be reduced, and thus the compact design can be achieved. It is an object of the present invention to provide an operation member for clutch and brake of an automatic transmission that can increase the design freedom associated with the arrangement of parts inside the transmission.

The present invention for achieving the above object is an input side hub and an output side retainer disposed in the inner and outer concentric circles, and the inner race and the outer race to transfer power interposed between the hub and the retainer, the inner race and the outer Ring-shaped clutch interposed between the races to disconnect or connect power, and one side is fixed to the case while the other is bound to the outer circumference of the retainer, and the disk selectively restrains the retainer operation by being closely or spaced according to the movement of the piston And a disc-shaped piston, one of which is operated in combination with the disc set while the other extends inwardly through the groove of the retainer to slidably position the ring-type clutch and selectively activates the ring-type clutch. It is done.

In addition, the ring-shaped clutch has a conical cross section and a clutch body that is wedge-shaped between the inner race and the outer race, a plurality of springs that elastically support one side of the clutch body, and the spring of being supported on the retainer It characterized in that it comprises a spring retainer for supporting one side.

In addition, the disk-type piston is characterized in that it has a ring-shaped body based on a plurality of pins are formed at equal intervals along the inner circumference of the body and one-to-one correspond to the groove of the retainer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view showing the operation member for the clutch and brake of the automatic transmission according to an embodiment of the present invention.

As shown in FIG. 2, the clutch and brake actuating members constitute a single assembly that performs both a clutch function and a brake function, while the input input to the hub is decelerated or transmitted 1: 1 by an operation combination of the clutch and the brake. It consists of a structure in which one element must operate and two elements do not operate at the same time.

As the clutch and brake operating members, a ring-shaped clutch having a conical cross section is used as the clutch element, and a multi-plate clutch is used as the brake element, wherein the clutch element and the brake element are placed in the radial direction.

To this end, the hub 10 corresponding to the input side is arranged in a concentric manner in the form of a retainer 11 connected to the output side such as sun gear, etc., and is disposed between the outer peripheral portion of the hub 10 and the inner peripheral portion of the retainer 11. The inner race 12 and the outer race 13 are arranged concentrically.

At this time, the inner race 12 is fixed by a snap ring or a stop groove while being connected to the hub 10 and a spline, and the outer race 13 is fixed to a snap ring or stop groove while being connected to an inner spline of the retainer 11.

Here, the retainer 11, as shown in Figure 3, is provided with grooves 23 are formed at regular intervals along the circumferential direction, the disc-shaped piston (to be described later through the grooves 23 at this time) 18) is assembled so that the pin 24 can be extended to its inner side.

Moreover, the disk set 17 which has a form in which several plates overlap is arrange | positioned at the outer periphery of the retainer 11 is arrange | positioned.

The set of disks 17 is combined with each other so that the fixing elements and the movable elements are arranged one by one, the fixing elements are fixed to the case 13, and the movable elements are connected with the outer splines of the retainer 11 to operate together. It becomes possible.

In order to operate such a disk set 17, a disk-shaped piston 16 is arranged side by side in concentric circles on the front side of the retainer 11, wherein the piston 16 is operated by a known operating element. By pressurizing the disk set 17 with the protruding portion, the movable element and the fixing element of the disk set 17 are tied together, so that the retainer 11 is fixed by the binding of the disk set 17 and the brake is made. You lose.

In addition, a ring-type clutch 14 as a clutch element is installed between the inner race 12 and the outer race 13 to serve to block or connect power between the two races.

To this end, the ring-shaped clutch 14 is composed of a clutch body 19 and a plurality of springs 20 and spring retainers 21 for supporting the clutch body 19, the clutch body 19 in a ring shape having a conical cross section. It is made between the inner race 12 and the outer race 13 in a wedge shape, the spring 20 is elastically supporting one side of the clutch body 19, that is, the wide side of the conical cross section, On the rear side, a spring retainer 21 fixed to the retainer 11 is disposed in a form supporting one side of the spring 20.

Accordingly, the clutch body 19 is moved forward by the elastic support of the spring 20, and is always in the state capable of transmitting power while being sandwiched between the inner race 12 and the outer race 13, and the external force is When you act, you will be able to back off and cut off power.

A disc-shaped piston 18 is provided as an element for actuating the ring clutch 14.

The disk-shaped piston 18, as shown in FIG. 4, comprises a ring-shaped body 22 and a plurality of pins 24 formed at equal intervals along the circumference of the inner circumferential surface of the body 22. It is formed in the form, the body 22 is fitted in the disk set 17 to be combined together to move together, the pin 24 is formed in a position corresponding to one-to-one to the groove 23 of the retainer 11 At the same time it is located in front of the ring-shaped clutch 14 while extending inwardly through the groove 23 of the retainer 11.

Accordingly, the disc-shaped piston 18 moves together in the engagement of the disc set 17 for the brake action to push out the clutch body 19 of the ring-type clutch 14 using the bent lower end of its pin 24. It becomes possible.

Thus, looking at the operating state of the clutch and brake operating member according to an embodiment of the present invention configured as described above are as follows.

Figure 5 is a cross-sectional view showing an example of the clutch operation in the clutch and brake operating member of the automatic transmission according to an embodiment of the present invention.

As shown in FIG. 5, here the state at 1: 1 power transmission (clutch action) is shown.

In the state where the operating force of the piston 16 is released, the hub 10 may be caught by the inner race 12 and the outer race 13 while the clutch body 19 of the conical section of the ring-type clutch 14 is bitten by the spring 20. Power is transmitted to the retainer 11, power is transmitted to a sun gear (not shown) connected to the retainer 11 to perform 1: 1 power transmission.

6 is a cross-sectional view showing an example of the brake operation in the clutch and brake operating member of the automatic transmission according to an embodiment of the present invention.

As shown in Fig. 6, the deceleration (brake action) state is shown here.

At the time of deceleration, the piston 20 is operated to fix the retainer 11 in close contact with the disc set 17.

At this time, the disc-shaped piston 18 pushes the clutch body 19 of the ring-type clutch 14 through its pins 24, and at the same time the inner race 12 and the outer race 13 are separated and the retainer 11 It acts only as a reaction element of the sun gear connected to).

As described above, the present invention provides a clutch and a brake operating member capable of performing both a clutch function and a brake function in one assembly, thereby reducing the number of parts and thus enabling a more compact design. Design freedom in terms of component placement can be increased, and ultimately, the merchandise improvement can be expected.

Claims (3)

An inner race 12 and an outer race interposed between the input hub 10 and the output retainer 11 disposed concentrically on the inner side and the outer side, and transmitting power between the hub 10 and the retainer 11; 13, a ring-shaped clutch 14 interposed between the inner race 12 and the outer race 13 to cut off or connect power, and one side is fixed to the case 15 and the other retainer 11 And a disk set 17 which is bound to the outer circumference of the head and selectively restrains the retainer operation while being closely or spaced according to the operation of the piston 16, and one side is operated in combination with the disk set 17 and the other side is And a disk-shaped piston 18 extending inwardly through the groove 23 of the retainer 11 and slidably positioned with the ring-type clutch 14 to selectively operate the ring-type clutch. The operation member for clutches and brakes of the automatic transmission. 2. The clutch body 19 according to claim 1, wherein the ring-shaped clutch 14 has a conical cross section and is wedge-shaped between the inner race 12 and the outer race 13 and one side of the clutch body 19. A clutch of the automatic transmission, characterized in that it comprises a plurality of springs 20 to elastically support the surface, and a spring retainer 21 supporting one side of the spring 20 while being supported on the retainer 11. And an actuating member for the brake. The method of claim 1, wherein the disk-shaped piston 18 has a ring-shaped body (22) as a base corresponding to the groove 23 of the retainer 11 one to one while being formed at equal intervals along the circumference of the body inner peripheral surface Clutch and brake operating member of the automatic transmission, characterized in that the form consisting of a pin 24.

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