JPH0533833A - Clutch structure for automatic transmission - Google Patents

Abstract

PURPOSE:To attain compactness and light weight in the axial direction as an automatic transmission total unit by providing constitution such as arranging two clutches, by which two rotary members can be respectively connected to a single rotary member, in the diametric direction, in an automatic transmission. CONSTITUTION:A clutch 10, comprising a drum 13 spline-fitted to an input shaft 1, clutch plate 14 connected to the drum 13, clutch plate 16 connected to a rotary member 15 corresponding to the clutch plate 14, piston 17 for pressing these clutch plates to connect the clutch, etc., is arranged to aside the periphery. A clutch 11, comprising a drum 20 spline-fitted to the internal periphery of the drum 13, clutch plate 21 connected to the drum 20, clutch plate 23 connected to a rotary member 22 corresponding to the clutch plate 21, piston 24 for pressing these clutch plates to connect the clutch, etc., is arranged to the inside of the clutch 10 to constitute an automatic transmission formed in compactness and light weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a clutch structure capable of compactly accommodating a plurality of clutches that couple between one rotary member and a plurality of rotary members to be drivingly coupled thereto.

[0002]

2. Description of the Related Art As a conventional clutch structure of this type,
For example, there is one shown in FIG. Figure 4 is from Chrysler
This figure shows a part of an A604 type automatic transmission, which corresponds to the portion of the clutch disposed near the right end of the input shaft in Fig. 1B of US Pat. No. 4,935,872. In this A604 type automatic transmission, a rotating member 53 is connected to the input shaft 50 at the outermost periphery via members 51 and 52, and rotating members 54 and 55 are arranged near the inner periphery of the rotating member 53. Rotating members 54 and 55 can be connected to 50 by clutches 56 and 57, respectively. Further, the constituent elements of the planetary gear set 58 can be connected to the rotating member 53 by the clutch 59, the shaft 60 is connected to the inner peripheral end of the rotating member 54, and the constituent elements of the planetary gear set 58 are further connected to the rotating member 55. I am doing it. In this A604 type automatic transmission, a clutch 56 is engaged with the stroke of the piston 61 to the right in the figure to drive-couple the input shaft 50 and the rotary member 54, and the member 52 is slidably supported and functions as a piston. A clutch 57 is engaged with a selective stroke of the rotary member 53 in the leftward direction in the drawing to drive-couple the input shaft 50 and the rotary member 55, and a clutch 59 is engaged with a selective stroke of the rotary member 53 in the rightward direction in the drawing. Drive coupling between the input shaft 50 and the components of the planetary gear set 58.

[0003]

In the above-mentioned conventional example, since the clutches 56 and 57 for connecting the rotating members 54 and 55 to the input shaft 50 are arranged side by side in the axial direction, the shaft of the automatic transmission is formed. There is a problem that the directional dimension becomes long and it becomes difficult to make it compact.

An object of the present invention is to solve the above-mentioned problems by arranging two clutches, which allow two rotary members to be connected to one rotary member, side by side in the radial direction.

[0005]

To this end, a clutch structure for an automatic transmission according to the present invention is provided with a first rotating member and an inner peripheral side of the first rotating member. The rotating member further includes second and third rotating members drivingly connected to the rotating member, and first and second clutches capable of connecting the second and third rotating members to the first rotating member, respectively. In a clutch structure for an automatic transmission, the first and second
The clutch is arranged in the radial direction.

[0006]

According to the present invention, for example, the automatic transmission has an input shaft and an output shaft that are coaxial with each other, and is arranged concentrically with the input shaft and the output shaft so that the first, second, and third sun gears are sequentially arranged from the input shaft side. 1,
First, second, and third planetary gear sets having second and third ring gears and first, second, and third carriers are provided, and the first sun gear is an input shaft and the third carrier is an output shaft. Combined with each other,
The first ring gear can be fixed by the first brake, the first carrier can be coupled to the second ring gear and can be fixed by the second brake, and the second and third sun gears can be the first
The clutch can be coupled to the input shaft, the second carrier can be coupled to the input shaft by the second clutch on the one hand, and can be coupled to the third ring gear on the other hand and can be fixed by the third brake. Is a clutch drum of a first clutch, the second rotating member is a rotating member located between the first clutch and the second and third sun gears, and the third rotating member is a second clutch. A clutch structure in which first and second clutches that allow the first rotating member to be coupled to the second and third rotating members, respectively, are arranged in a radial direction in a configuration that is a rotating member located between the second carriers. (In that case, for example, the first and second clutches are arranged in parallel in the radial direction so that the first clutch is located on the outer peripheral side, and the pistons of these clutches are arranged. The piston of the first clutch is arranged axially inward of the piston of the second clutch), and the axial space for accommodating these clutches can be greatly reduced compared to the case of the clutch structure of the conventional example. Therefore, it is possible to reduce the axial size and weight of the automatic transmission as a whole.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a partial sectional view showing a first embodiment of a clutch structure for an automatic transmission according to the present invention, FIG. 2 is a skeleton diagram of a gear transmission mechanism of an automatic transmission using the same example, and FIG. 3 is using the same example. It is a figure showing the whole automatic transmission composition. First, FIG.
The entire automatic transmission of this example will be described below. The input shaft 1, the output shaft 2, and the intermediate shaft 3 located therebetween are provided in a coaxial butting relationship, and a planetary gear transmission mechanism is concentrically provided between these input and output shafts. Deploy. The planetary gear transmission is the first
The planetary gear set 4, the second planetary gear set 5, and the third planetary gear set 6 are provided, and the first planetary gear set 4 includes the first sun gear 4
_A simple planetary gear set consisting of _S , a first ring gear 4 _R , a pinion 4 _P meshing with the sun gear and the ring gear, and a first carrier 4 _C rotatably supporting the pinion 4 _P , and similarly a second planetary gear set. And the third planetary gear sets 5, 6
Respectively, second and third sun gears 5 _S and 6 _S , second and third ring gears 5 _R and 6 _R , pinions 5 _P and 6 _P meshing with these sun gears and ring gears, and these pinions being rotatable. It is a simple planetary gear set consisting of supporting second and third carriers 5 _C and 6 _C.

[0008] as well as connected to the input shaft 1 to the sun gear 4 _S, the input shaft sun gear 5 _S, 6 _S by the clutch C ₁ 1
Allowing binding to further the carrier 5 _C to allow binding to the input shaft 1 by a clutch C _2. Further, the ring gear 4 _R can be fixed by the first brake (band brake) B ₁ , and the carrier 4 _C and the ring gear 5 _R can be fixed by the second brake B _2.
C and the ring gear 6 _R can be fixed by the third brake B ₃ , and the carrier 6 _C is connected to the output shaft 2.

In this gear transmission mechanism, the clutches, brakes and the like are selectively operated by the combinations shown in the following table (operating states are indicated by circles) to the forward first speed to fifth speed.
Fast and reverse (R) gears can be obtained.

[0010]

Next, the overall structure of the automatic transmission of this embodiment will be described with reference to FIG. In FIG. 3, reference numerals 1, 2 and 3 denote an input shaft, an output shaft and an intermediate shaft, respectively, and these shafts penetrate the transmission central portion in the axial direction. A torque converter 7 (only part of which is shown in FIG. 3) is arranged on the left side of the input shaft 1 in the drawing, and an oil pump 8 is provided in the middle of the input shaft 1.
Are arranged. In the vicinity of the right end of the input shaft 1, a clutch pack composed of clutches 10 and 11 corresponding to the clutches C ₁ and C ₂ in FIG. 2 and a first brake (band brake) B ₁ are arranged. The right end of 1 supports the intermediate shaft 3 rotatably. The first planetary gear set 4, the second planetary gear set 5, and the third planetary gear set 4 from the left side in the figure over the entire intermediate shaft 3.
The planetary gear sets 6 are arranged in that order, and the second and third brakes B ₂ , B _{3 and the} like are arranged on the outer periphery of the planetary gear sets. The output shaft 2 is arranged to the right of the intermediate shaft 3, and the left end of the output shaft 2 rotatably supports the intermediate shaft 3. The output shaft 2 is provided with a piston portion of the brake B _3, a support wall, and the like, and a transmission case 9 is provided at the outermost periphery thereof.
Is provided. In this automatic transmission, a control valve 12 that supplies oil to the illustrated oil passages is arranged on the outer periphery of the first brake B ₁ .

Next, the clutch structure of the automatic transmission of this embodiment will be described with reference to FIG. FIG. 1 shows only the essential part of the clutch structure of this example, and the illustration of other components is omitted. In the figure, 10 and 11 respectively indicate clutches, which correspond to the clutches C ₁ and C ₂ in FIG. The clutch 10 is the input shaft 1
A clutch drum 13 spline-fitted to the clutch drum 13, a plurality of clutch plates 14 coupled to the clutch drum 13, a plurality of clutch plates 16 corresponding to the clutch plates and coupled to a rotating member 15, and a hydraulic pressure Piston 17 that engages the clutch by pressing these clutch plates to the right in the figure during operation
A spring 18 for urging the piston 17 in the releasing direction (left direction in the drawing), and a retainer 19 for supporting the spring 18. Further, the clutch 11 includes a clutch drum 20 that is spline-fitted to the inner circumference of the clutch drum 13, a plurality of clutch plates 21 that are coupled to the clutch drum 20, and a rotating member 22 that is arranged corresponding to these clutch plates. A plurality of clutch plates 23 that are coupled, a piston 24 that presses these clutch plates to the left in the drawing when hydraulically operated to close the clutch, and a spring 25 that biases the piston 24 in the releasing direction (to the right in the drawing).
And a member 26 that supports the spring 25 and cancels the centrifugal hydraulic pressure. In this part, in addition to the clutches 10 and 11, there is a bearing 28 on the input shaft support wall 27.
A brake drum 29 whose one end is supported via the brake drum 29 is also arranged.The brake drum 29 has a brake band 30 attached to a maximum diameter portion located closer to the outer circumference than the piston 24, and the other end has bearings 31, 32. Supported by.

Next, the operation of the clutch structure of this embodiment will be described. In the clutch 10, when hydraulic pressure is supplied to the chamber 33, the piston 17 strokes to the right in FIG.
16 are fastened together, the rotation of the input shaft 1 is transmitted to the rotating member 15 via the clutch drum 13, and the intermediate shaft 3 connected to the rotating member 15 is rotated. Further, in the clutch 11, when hydraulic pressure is supplied to the chamber 35, the piston 24 strokes to the left in FIG. 1 to engage between the clutch plates 21 and 23, and rotate the input shaft 1 via the clutch drums 13 and 20. The rotation member 22 is transmitted to the rotation member 22.
The second carrier 5 _C (not shown) coupled to is rotated. Note the rotation member 37 through the hole 36a of the member 36 to be coupled to the illustrated right end of the piston 24, because it is coupled to the first sun gear 4 _S, the sun gear 4 _S by the rotation of the input shaft 1
Always rotates.

By the way, in the present embodiment, the clutches 10 and 11 having the above-mentioned action are arranged in the radial direction, and the pistons 17 and 24 of these clutches are pressed from the inner side to the clutch plate 14 and the piston 24 from the outer side. Clutch plate
Since the clutch pack is configured by arranging them in the axial direction so as to press 21, the axial space for accommodating these clutches can be significantly reduced compared to the conventional example in which the clutches are arranged in the axial direction. It is possible to reduce the axial size and weight of the entire machine. Also, the clutch drum 20
Since it is spline-fitted to the inner circumference of the clutch drum 13, it is possible to secure the assembling property. Further, since the clutch drum 20 fitted with the spline is sandwiched in the axial direction between the rotating member 37 functioning as a positioning member and the snap ring 38, the clutch drum 20 can be prevented from falling.

[0015]

As described above, in the clutch structure of the automatic transmission according to the present invention, as described above, the two clutches that allow the two rotary members to be coupled to the one rotary member are arranged side by side in the radial direction. The axial space for accommodating can be greatly reduced compared to the case of the above-described conventional clutch structure, and the axial size and weight of the entire automatic transmission can be reduced.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a first embodiment of a clutch structure for an automatic transmission according to the present invention.

FIG. 2 is a skeleton diagram of a gear transmission mechanism of the automatic transmission using the same example.

FIG. 3 is a diagram showing an overall configuration of an automatic transmission using the same example.

FIG. 4 is a diagram for explaining a conventional technique.

[Explanation of symbols]

1 input axis 10 clutch (1st clutch) 11 clutch (second clutch) 13 Clutch drum (first rotating member) 15 Rotating member (second rotating member) 17 piston 20 clutch drum 22 Rotating member (3rd rotating member) 24 pistons

Claims (3)

[Claims] 1. A first rotating member, second and third rotating members located on an inner peripheral side of the first rotating member and drivingly coupled to the first rotating member, and the second rotating member. , A first rotating member capable of connecting a third rotating member to the first rotating member, respectively
A clutch structure for an automatic transmission, comprising: and a second clutch, wherein the first and second clutches are arranged in a radial direction. 2. The automatic transmission comprises an input shaft and an output shaft which are coaxial with each other, and which are arranged concentrically with each other, and are sequentially arranged from the input shaft side in order of first, second and third sun gears, first, second and second sun gears. First, second, and third planetary gear sets having a third ring gear and first, second, and third carriers are provided, and the first sun gear is used as an input shaft,
The third carrier is connected to the output shaft, respectively, the first ring gear can be fixed by the first brake, and the first carrier is connected to the second shaft.
The second gear can be connected to the input shaft by the first clutch, the second carrier can be connected to the input shaft by the second clutch, and the second carrier can be connected by the second clutch. The first rotating member is a clutch drum of a first clutch and the second rotating member is a first clutch and a second clutch. The clutch structure for an automatic transmission according to claim 1, wherein the rotating member is located between three sun gears, and the third rotating member is a rotating member located between the second clutch and the second carrier. . 3. The first and second clutches are arranged in parallel in the radial direction so that the first clutch is located on the outer peripheral side, and
3. The clutch structure for an automatic transmission according to claim 2, wherein the pistons of the clutches are arranged such that the pistons of the first clutch are located axially inward of the pistons of the second clutch.