JPH068861U - Clutch drum coupling structure in transmission - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the connecting shell from falling off the clutch drum during assembly of the transmission without impairing the original function of the transmission, thereby improving the assembly workability. A first spline tooth 6A is provided on an outer peripheral edge portion of the reverse clutch drum 6 so as to project in a rotation axis O direction thereof, and a first spline tooth is radially protruded at an outer peripheral edge portion of the connecting shell 10. 6A is provided with a second spline tooth 10A for spline fitting, a fitting groove 6B is provided on the inner peripheral surface on the tip side of the first spline tooth 6A, and an elastic stop ring 20 is fitted into the fitting groove 6B. I wore it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coupling structure for a clutch drum in a transmission such as an automobile.

[0002]

[Prior art]

 As an automatic transmission of an automobile, for example, a substantially disk-shaped connecting shell connected to a front sun gear and a clutch drum are rotatably fitted around the outer periphery of an input shaft connected to a turbine runner of a torque converter. Then, the outer peripheral edge portions of these clutch drums and connecting shells are spline-fitted to each other, and a low clutch mechanism and a reverse clutch mechanism are provided inside the clutch drums. When assembling such a transmission, a connecting shell is assembled to the clutch drum.

Conventionally, in such a transmission, at the time of assembling, the connecting shell is simply attached to the clutch drum by spline fitting, and the assembling state is maintained between both of them. There was no provision for retention.

[0004]

[Problems to be solved by the device]

 However, in the conventional transmission, as described above, the connecting shell is simply assembled to the clutch drum by spline fitting, so that the connecting shell may fall off from the clutch drum when the transmission is assembled. The workability of assembling the transmission was poor, and it was an obstacle to automating the work of assembling.

An object of the present invention is to provide a transmission in which the connecting shell can be prevented from coming off from the clutch drum at the time of assembling, and the assembling workability can be improved without impairing the original function of the transmission. It is to provide a coupling structure for a clutch drum.

[0006]

[Means for Solving the Problems]

 The coupling structure of the clutch drum in the transmission of the present invention is rotatably equipped around the axis of the input shaft, and is rotatable around the axis of the input shaft at the outer peripheral edge of the clutch drum having the clutch mechanism inside. In the coupling structure of the clutch drum in the transmission in which the outer peripheral edge portion of the connecting shell installed in the vehicle is spline-fitted, one side of the outer peripheral edge portion of each of the clutch drum and the connecting shell is provided with a circumferential direction. First spline teeth that are arranged at a predetermined interval along the rotation axis direction and that are arranged at a predetermined interval along the circumferential direction on the other side of the outer peripheral edge of each of the first spline teeth. Providing second spline teeth that protrude in the radial direction and spline-fit with the first spline teeth. The distal inner periphery of the spline teeth, and characterized in that fitting the stop ring to the retaining of the extended life-and-death said second spline teeth along the rotational direction of the input shaft.

[0007]

[Action]

 The coupling structure of the clutch drum in the transmission of the present invention is such that a stop ring is fitted on the inner peripheral surface of one side of each spline tooth of the clutch drum and the connecting shell which are spline-fitted to each other, and the stop ring allows the transmission to By preventing the connecting shell from falling off from the clutch drum when assembling, the workability of assembling the clutch drum and the connecting shell is improved, and at the same time, the assembling work of them and the assembly work of the transmission are automated. It is also possible. Further, when the clutch drum rotates, the stop ring is pressed in the fitting direction by the centrifugal force, so that the fitting state is reliably maintained.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. This embodiment is an application example as a connecting structure of a reverse clutch drum in an automatic transmission of an automobile.

In FIG. 1, reference numeral 1 denotes an input shaft that is connected to a turbine runner of a torque converter (not shown), and is rotatably supported in a transmission case 2. 3 is an oil pump cover fixed to the transmission case 2, 4 is an oil pump sleeve fixed to the inner peripheral portion of the oil pump cover 3, 5 is a low clutch drum fixed to the outer peripheral portion of the input shaft 1, 6 Is a reverse clutch drum (clutch drum) rotatably fitted around the outer periphery of the oil pump sleeve 4. A rear sun gear 7 and a front sun gear 8 are coaxially and rotatably fitted on the outer peripheral portion of the input shaft 1. The former gear 7 is a planetary gear (not shown) on the left side in FIG. The latter gear 8 is connected to a carrier and an output gear, and the latter gear 8 is connected to a planetary carrier and an output gear (not shown) on the left side in FIG. Furthermore, a low clutch hub 9 is fixed to the right side of the rear sun gear 7 in FIG. 1, and a connecting shell 10 is fixed to the right side of the front sun gear 8 in FIG. The connecting shell 10 and the outer peripheral portion of the above-mentioned reverse clutch drum 6 are spline-fitted as will be described later, and these rotate integrally around the axis of the input shaft 1. In FIG. 1, reference numerals 21, 22, and 23 are thrust needle bearings.

A low clutch mechanism C ₁ is provided between the low clutch drum 5 and the low clutch hub 9 for transmitting and interrupting the rotational force therebetween. That is, the low clutch piston 11 is hydraulically controlled to move to the left in FIG. 1, so that the low clutch plate 12 on the inner peripheral side of the low clutch drum 5 and the low clutch plate 13 on the outer peripheral side of the low clutch hub 9 are controlled. And are connected by pressure, and the low clutch piston 11 is controlled to move to the right in FIG. 1, whereby the low clutch plates 12 and 13 are separated from each other, and the low clutch plates 12 and 13 are separated from each other. Be cut off. Incidentally, 14 is a centrifugal cancel piston.

Further, between the low clutch drum 5 and the reverse clutch drum 6, a reverse clutch mechanism C ₂ for transmitting and interrupting the rotational force between them is configured. That is, the reverse clutch piston 15 is hydraulically controlled to move leftward in FIG. 1, so that the reverse clutch plate 16 on the outer peripheral side of the low clutch drum 5 and the reverse clutch plate on the inner peripheral side of the reverse clutch drum 6 are controlled. 17 are pressed into contact with each other to connect them, and the reverse clutch piston 15 is controlled to move to the right in FIG. 1, so that the reverse clutch plates 16 and 17 are separated from each other, and the two are separated. Be cut off.

Further, a band brake 18 for braking the reverse clutch drum 6 is provided inside the transmission 2, and a combination of the operations of the band brake 18 and the above-mentioned clutch mechanisms C ₁ and C ₂ is provided. , 2nd and 4th speed of the car can be moved forward and backward. That is, when the vehicle moves forward in the _2nd and 4th speeds, the low clutch mechanism C ₁ is engaged, the reverse clutch mechanism C ₂ is disengaged, and the band brake 18 is activated so that the low clutch drum 5 that rotates integrally with the input shaft 1 Is transmitted to the low clutch mechanism C ₁ , the low clutch hub 9, the rear sun gear 7, and the planetary carrier (not shown) and the output gear. At this time, the reverse clutch drum 6, the connecting shell 10 and the front sun gear 8 are braked and do not rotate. On the other hand, when the vehicle moves backward, the low clutch mechanism C ₁ is in the disengaged state, the reverse clutch mechanism C ₂ is in the connected state, and the band brake 18 is in the inoperative state, and the rotational force of the low latch drum 5 that rotates integrally with the input shaft 1 is generated. Is transmitted to the reverse clutch mechanism C ₂ , the reverse clutch drum 6, the connecting shell 10, the front sun gear, and a planetary carrier and an output gear (not shown).

By the way, as shown in FIG. 2, the reverse clutch drum 6 in such an automatic transmission is provided with a plurality of first spline teeth 6A on the outer peripheral line thereof. The spline teeth 6A and the plurality of second spline teeth 10A provided on the outer peripheral edge portion of the connecting shell 10 are spline-fitted to each other. That is, the first spline teeth 6A are located at the outer peripheral edge of the clutch drum 6 at a predetermined equal interval along the circumferential direction thereof, and the rotation axis O thereof (the rotation of the input shaft 1 and the connecting shell 10). It also projects in the same direction as the axis. On the other hand, the second spline teeth 10A are located on the outer peripheral edge of the connecting shell 10 along the circumferential direction thereof at predetermined equal intervals and project in the circumferential direction. Then, as shown in FIG. 2, the spline teeth 6A and 10A are spline-fitted to each other, so that the reverse clutch drum 6 and the connecting shell 10 cannot relatively rotate about the axis O and can relatively displace in the axis O direction. Are linked to. Further, a fitting groove 6B is formed on the inner peripheral surface of the tip of the first spline tooth 6A along the circumferential direction of the reverse clutch drum 6, and the elastic stop ring 30 is fitted in the fitting groove 6B. It is worn. Therefore, the stop ring 30 regulates the allowable amount of relative displacement of the reverse clutch drum 6 and the connecting shell 10 in the direction of the axis O. Further, as shown in FIG. 1, the length L _{1 obtained} by subtracting the plate thickness W of the connecting shell 10 from the length L ₀ between the fitting groove 6 B and the root of the first spline tooth 6 A is The length of the play (end play) to the right of the reverse clutch drum 6 in the figure is set to be larger than the length L ₂ , so that the stop ring 30 does not interfere with the end play of the reverse clutch drum 6. .

However, the reverse clutch drum 6 and the connecting shell 10 as described above are first assembled with the clutch mechanisms C ₁ and C ₂ inside the reverse clutch drum 6 at the time of assembling the transmission. , Are spline fitted to each other. After that, the retaining ring 30 is elastically fitted into the fitting groove 6B of the reverse clutch drum 6 so that the connecting shell 10 is prevented from coming off from the reverse clutch drum 6. Therefore, as compared with the conventional clutch drum coupling structure in which the connecting shell 10 may fall off from the reverse clutch drum 6, the assembling workability thereof is improved, and the assembling work, and hence the transmission, of the transmission is improved. It is possible to automate the assembly work. Further, since the stop ring 30 is fitted on the inner peripheral surface of the first spline tooth 6A, when the reverse clutch drum 6 rotates, the stop ring 30 is pressed into the fitting groove 6B by the centrifugal force. As a result, the fitted state of the retaining ring 30 can be reliably maintained.

[0015]

[Effect of device]

 As described above, the coupling structure of the clutch drum in the transmission of the present invention is such that the retaining ring is fitted to the inner peripheral surface on one side of each of the spline teeth of the clutch drum and the connecting shell which are spline-fitted to each other. Since the retaining ring is configured to prevent the connecting shell from falling off from the clutch drum when the transmission is assembled, the workability of assembling the clutch drum and the connecting shell can be improved, and further, the assembling of those It is also possible to realize automation of work, and eventually assembly work of the speed changer. Moreover, when the clutch drum rotates, the stop ring is pressed in the fitting direction by the centrifugal force, so that the fitting state can be reliably maintained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a clutch drum and a connecting shell shown in FIG.

[Explanation of symbols]

1 Input Shaft 6 Reverse Clutch Drum (Clutch Drum) 6A 1st Spline Tooth 10 Connecting Shell 10A 2nd Spline Tooth 20 Stop Ring C ₁ Low Clutch Mechanism C ₂ Reverse Clutch Mechanism

Claims (1)

[Scope of utility model registration request] 1. An outside of a connecting shell rotatably mounted about the axis of the input shaft at an outer peripheral edge of a clutch drum rotatably mounted about the axis of the input shaft and having a clutch mechanism inside. In a clutch drum coupling structure for a transmission in which a peripheral edge portion is spline-fitted, in one side of an outer peripheral edge portion of each of the clutch drum and the connecting shell, the peripheral portions are arranged at predetermined intervals along the circumferential direction and the rotation axis thereof. First spline teeth projecting in a predetermined direction are provided, and the first spline teeth are arranged on the other side of the respective outer peripheral edge portions at predetermined intervals along the circumferential direction and project in the radial direction.
Second spline teeth for spline fitting with other spline teeth are provided, and the second spline teeth extend along the rotational direction of the input shaft at the inner peripheral portion of the tip end of the first spline tooth. A coupling structure of a clutch drum in a transmission, characterized in that a retaining ring for retaining is fitted.