JPS6138258A - Tapping hole of internally fitting member in speed changer - Google Patents

Abstract

PURPOSE:To improve a removal and an assembly characteristic of an internally fitting member, by providing a tapping hole in the internally fitting member mounted to the internal surface of a speed changer case. CONSTITUTION:An automatic speed changer is constituted by a fluid type torque converter, transmission and an oil hydraulic control device. A speed changer case of the automatic speed changer tightens by many bolts a torque converter housing containing the torque converter, transmission case integrally forming each chamber containing an overdrive and an underdrive speed change gear and an extension housing. An internally fitting member 2, providing a tapping hole 3 penetrating a partition 2B dividing an overdrive mechanism chamber from an underdrive mechanism chamber while having an internal thread 3A, is removed and assembled by screwing the external thread of a jig to said tapping hole 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an internal fitting member that is fitted inside and attached to a transmission case of an automatic transmission.

[Prior Art] Conventionally, an internal fitting member that is fitted inside the inner periphery of a transmission case of an automatic transmission is thin and has the minimum required size for the purpose of reducing the weight of the automatic transmission and shortening it in the axial direction. It was said to be the shape.

[Problems to be Solved by the Invention] In the conventional technology described above, the internal fitting member is thin and has the minimum necessary shape, so there are cases where there is no place to grip it, and when installing the internal fitting member in the transmission case, Also, it was difficult to remove the inner fitting member from the transmission case, and the ease of disassembly and assembly was very poor.

An object of the present invention is to provide a tapped hole with a female thread on the inner periphery in an internal fitting member that is fitted and attached to the inner periphery of a transmission case, so that a male thread corresponding to the female thread can be inserted into the tapped hole. The purpose of the present invention is to provide a tapped hole of a transmission case internal fitting member that improves the ease of removing and assembling the internal fitting member using a jig.

[Means for Solving the Problems] The tapped hole of the transmission case internal fitting member of the present invention is a tapped hole whose inner periphery is female threaded 3A in the internal fitting member 2 attached to the inner periphery of the transmission case 1. 3 has been provided.

[Operations and Effects of the Invention] The transmission case internal fitting portion of the present invention having the above configuration, the tapped hole of the material has an inner circumferential female screw and By providing a tapped hole, it is possible to remove and assemble the internal fitting member using a jig with a male thread that corresponds to the female thread in this tapped hole.
can be easily carried out, and the assemblability and divisibility are improved.

[Effects of Example] When the inside of the transmission case is separated by the internal fitting member, by providing the tap hole so as to penetrate the internal fitting member, the tap hole can make the air pressure in the separated transmission case the same. It functions as a breather to maintain the temperature.

[Example] Next, a tap hole of a transmission case fitting member of the present invention will be described based on an example shown in the drawings. 1 is a sectional view of an automatic transmission for a vehicle to which the tap hole of the transmission case fitting member of the present invention is applied.

Automatic transmission $100 is hydraulic torque converter 200
, transmission 300 , and hydraulic control device 400
It consists of

The transmission 300 includes a first planetary gear device UO1
One multi-disc clutch C01 operated by hydraulic servo
An overdrive transmission 300A including one multi-disc brake BO1 and one one-way latch FO, a second planetary gear system U1, a third planetary gear system U2, two multi-disc clutches C1 operated by a hydraulic servo, C2,1
Two belt brakes B1. Two multi-disc brakes B2, B
3, and two one-way latches Fl and F2, an underdrive transmission 300B with three forward speeds and one reverse speed.
It consists of

The transmission case 1 of the automatic transmission 100 includes a torque converter housing 120 that accommodates a torque converter 200.
, a transmission case 130 integrally formed with chambers accommodating an overdrive transmission 300A and an underdrive transmission 300B, and an automatic transmission 1.
Extension housing 140 that covers the rear side of 00
These torque converter housings 120
The transmission case 130 and the extension housing 140 are each fastened with a large number of bolts.

The torque converter 200 is housed in a torque converter housing 120 that is open at the front (engine side), and includes a front cover 201 that rotates under the drive of an engine (not shown), and an annular plate welded to the inner circumference of the front cover 201. A rear cover 202 having a shape, a pump impeller 203 disposed around the inner peripheral wall of the rear cover 202, a turbine runner 204 disposed opposite to the pump impeller 203, and a turbine shell 205 holding the turbine runner 204. , a stator 208 that is supported by a fixed shaft 207 connected to the transmission case 1 via a one-way clutch 206 and increases the torque capacity when the input rotation speed is low;
A direct coupling clutch (lock-up clutch) 2 is provided between the front cover 201 and the turbine shell 205 to rotate the front cover 201 and the turbine shell 205 at the same time.
Equipped with 09 □. An internal gear oil pump 150 having an external gear 150a and an internal gear 150b is housed between the cylindrical transmission case 130 and the torque converter housing 120, which are continuous to the rear of the torque converter housing 120. An oil pump body 152 having a cylindrical portion 151 that protrudes forward on the inner periphery.
is fastened to the front of the transmission case 130,
Extension member 21 connected to the inner peripheral end of rear cover 202
0 is spline-fitted to the inner circumference of the external gear 150a via the inner circumference of the cylindrical portion 151. Further, an oil pump cover 154 is fastened to the rear side of the oil pump body 152 and has a cylindrical front support 153 that is self-axial with the cylindrical portion 151 and protrudes rearward. Pump cover 154 forms a partition between torque converter housing 120 and transmission case 130. In the middle of the inner circumference of the transmission case 130 of the transmission case 1 are an overdrive mechanism chamber 130A in which an overdrive transmission bag fil 300A is formed, and an underdrive mechanism chamber 130B in which an underdrive transmission 300B is formed.
An internal fitting member 2 having a cylindrical cylindrical support portion 2A projecting rearward and forming a partition wall between the two is provided so as to fit therein. Inner fitting member 2
is connected to the overdrive mechanism chamber 130 and the underdrive mechanism chamber 130B as shown in FIGS. 1, 2, and 3.
A tap hole 3 having a female thread 3A is provided inside the partition wall 2B which penetrates the partition wall 2B separating the two, and the outer circumferential surface 2C of the inner fitting member 2 is fitted into the inner circumference of the transmission case 130, and the outer circumference of the inner fitting member 2 The rear end surface 2D is in contact with a step 130C formed in the transmission case 130, and the outer peripheral front end surface 2F is supported by a ring-shaped fixture 4 that is fitted and installed on the inner periphery of the transmission case 130. A transmission case 130 is attached to the fastening screw 6 portion 2F that supports the member 2 and has a female thread on the lower inner periphery.
Transmission case 130 by bolt through
It is fastened inside. A rear support wall 134 having a cylindrical rear support 133 projecting forward is provided at the rear (right side in the figure) of the transmission case 130.

Inside the front support 153 is a one-way clutch 2 that supports the stator 208 of the torque converter 200.
A fixed shaft 207 of No. 06 is fitted, and the input shaft 10 of the transmission 300, which is the output shaft of the torque converter 200, is rotatably supported inside the fixed shaft 207. The input shaft 10 has a clutch portion 101 at the rear end,
A rearward facing hole 102 is formed in the center of the rear end.

An intermediate power transmission shaft 11 arranged in series with the input shaft 10 is rotatably mounted behind the input shaft 10, and the tip of the intermediate power transmission shaft 11 slides into a hole 102 of the input shaft 10. , a clutch portion 111 is provided at the rear end of the intermediate transmission shaft 11, and a rearward-facing hole 112 is formed in the center of which the tip of an output shaft 12 that transmits power to the driving wheels slides. Output shaft 1
2 fixes the sensor rotor 121 for rotation speed detection and the speedometer drive gear 122 in the extension housing 140, and the rear end has a spline W41 on the outer periphery to fit the sleeve yoke that transmits power to the drive wheels.
23 is formed, and is rotatably supported by the extension housing 140 via the sleeve yoke, and the front end is rotatably supported within the hole 112 of the intermediate shaft 11.

Overdrive transmission [300A is the input shaft 10
A first planetary gear unit UO is provided behind the planetary gear unit UO, its ring gear RO is coupled to the intermediate transmission shaft 11 via a flange plate 113, the planetary carrier PO is coupled to the clutch portion 101 of the input shaft 10, and the sun gear SO is coupled to the clutch portion 101 of the input shaft 10. It is formed by an inner race shaft 13 of a one-way latch FO.

i1 On the front side of the planetary gear unit UO, there is a first
The hydraulic servo drum 14 is fixed to the inner race shaft 13, and the annular piston 15 is fitted between the outer circumferential wall 14A and the inner circumferential wall 14B of the first hydraulic servo drum 14 to engage and disengage the carrier PO and the first hydraulic servo drum 14. A return spring 16 and an outer peripheral wall 1 form a hydraulic servo C-0 where Clara≠CO and press the annular piston 15 toward the inner race shaft 13 toward the hydraulic servo C-0.
Clutch CO is installed inside 4A, and the clutch GO
The first hydraulic servo drum 14 and the inner race shaft 13 are connected to the carrier PO. First hydraulic pressure -- A one-way latch FO with the inner race shaft 13 as an inner race is provided on the inner periphery of the body drum 14, and a clutch CO and a brake BO are provided on the outer periphery between the outer race 17 and the transmission case 130. , a piston 18 that presses the brake BO is fitted in the front/direction of the inner fitting member 2 at the rear of the brake BO, and the piston 1
8 and the inner fitting member 2 is the hydraulic servo B- of the brake BO.
0, and a return spring 19 that presses the piston 18 toward the hydraulic servo B-0 is fitted into the inner peripheral portion 135 of the front end of the internal fitting member 2.

In the underdrive transmission 300B, a second hydraulic servo drum 20 that opens rearward is rotatably fitted on the outer periphery of the cylindrical support portion 2A of the inner fitting member 2, and the outer circumferential wall 20A and the inner circumferential wall 20B are connected to each other. An annular piston 21 that presses the clutch C2 is fitted between the annular piston 21 and the second hydraulic servo drum 20 to form a hydraulic servo C-2 of the clutch C2 and press the annular piston 21 on the inner peripheral wall 20B side. A return spring 22 that presses toward the servo C-2 side and a clutch C2 are installed inside the outer peripheral wall 20^. Behind the second hydraulic servo drum 20,
A third opening at the rear and having an annular projection 23 at the front.
The hydraulic servo drum 24 is fixed to the outer periphery of the seven flange portions 111 at the rear portion of the intermediate transmission shaft 11, and the rear end of the intermediate transmission shaft 11, the outer peripheral wall 24^ of the third hydraulic servo drum 24, and the outer periphery of the flange portion 111. An annular piston 25 that presses the clutch C1 is fitted between the annular piston 25 and the third
A return spring 26 forms the hydraulic servo C-1 of the clutch C1 between the hydraulic servo drums 24 and presses the annular piston 25 toward the hydraulic servo C-1 on the inner circumference side of the clutch C1, and further on the outer circumference of the annular protrusion 23. clutch C
2 is attached, and the 2nd and 3rd hydraulic servo drums 20.24 are connected via a clutch C2. The third hydraulic pressure
A second planetary gear device U1 is provided at the rear of the bottom drum 24, and a ring gear R1 thereof is provided so as to protrude in front of a rotation support member 27 that rotatably supports the ring gear R1 on the outer periphery of the output shaft 12. annular projection 28 and clutch C
1 to the third hydraulic servo drum 24, the carrier P1 is spline-fitted to the front outer periphery of the output shaft 12, and the sun gear S1 is connected to the tip of a sun gear shaft 29 rotatably provided on the outer periphery of the output shaft 12. is integrally formed.

In addition, the 2.3rd hydraulic servo drum 20.24 and the 2nd
A connecting drum 30 molded to cover the planetary gear unit U1 with a minimum space is fixed at its front end to the outer periphery of the second hydraulic servo drum 20, and its rear end is connected to the sun gear shaft 29 behind the second planetary gear unit U1. A belt brake B1 is connected to the belt brake B1 and fixes and releases the connecting drum 30 on the outer peripheral side.
is provided.

A brake plate b2 of the brake B2 at the front and a brake plate b3 of the brake B3 at the rear are spline-fitted to a spline 136 formed on the inner periphery of the rear part of the transmission case 130. and an annular projection 31 on the front side.
A fourth hydraulic servo drum 32 is spline-fitted. An annular piston 33 that presses the brake B2 is fitted between the outer peripheral wall 32A of the fourth hydraulic servo drum 32 and the annular projection 31, and a hydraulic pressure of the brake B2 is fitted between the annular piston 33 and the fourth hydraulic servo drum 32. B-2
At the same time, an annular piston 33 is formed on the inner peripheral wall 32B side.
Return spring 34 that presses the B2 side toward the hydraulic servo B2.
is provided. Also, on the inner peripheral side of the brake B2, there is a one-way latch F1 that uses the sun gear shaft 29 as an inner race.
A brake B2 is provided on the outer periphery of the outer race 35.
is installed. Rear support wall 13 on the rear side of brake B2
The brake B3 is installed in the annular hole 36 formed between the outer circumferential side of the rear support 133 of No. 4 and the transmission case 130.
The plurality of pistons 371, 373 that press the hydraulic servo 3-3 and the reaction plate 372 are fitted to form the hydraulic servo B-3 of the brake B3, and the return spring 38 that presses the pistons 371, 373 toward the hydraulic servo 3-3 acts as a rear support. It is supported by a return spring fitting 38A attached to the tip of 133. Inner race 3 of one-way clutch F2 arranged on the inner circumference of brake B3
9 is the outer periphery of the sun gear shaft 29 and the fourth hydraulic servo drum 32
The outer race 40 of the one-way clutch F2
A brake B3 is attached to the outer periphery of the brake B3.

In the third planetary gear device U2, the sun gear S2 is connected to the sun gear shaft 2.
9, the carrier P2 is connected to the outer race 40 of the front one-way clutch F2 and the brake B3, and a ring gear R2 having a parking gear 41 around the outer periphery is connected to the output shaft 12 with the inner periphery. They are connected via a spline-fitted connecting member 42. The parking gear 41 is provided so that a parking pawl 43 engages with the parking gear 41 to fix the output shaft 12 when the shift lever of the automatic transmission is selected to the parking (P) position.

The transmission 300 adjusts the transmission case 1 depending on vehicle speed, throttle opening, and other vehicle running conditions.
The engagement of each clutch and brake is controlled by a hydraulic pressure control device 400 in a valve body 403 built in an oil pan 402 fastened to the lower part of the valve 30 by a hydraulic servo of each friction engagement device. The gears are engaged or released, resulting in four forward speeds or one reverse speed change. The operation of each clutch, brake, and one-way clutch and the gear position (RANGE) achieved
- Examples are shown in Table 1.

Table 1 In Table 1, E indicates that the corresponding clutch or brake is engaged, and × indicates that the corresponding clutch or brake is disengaged.

The corresponding one-way latch of L is engaged in the engine drive state, but this engagement is not necessarily required since power transmission is guaranteed by a clutch or brake built in parallel. (lock). (L) indicates that the corresponding one-way clutch is engaged only in the engine drive state and is not engaged in the engine brake state. Furthermore, f indicates that the corresponding one-way clutch is free.

[Brief explanation of the drawing]

Figure 1 is a front view of the internal fitting member, Figure 2 is the A-
A sectional view, FIG. 3 is a rear view of the internal fitting member, and FIG. 4 is an automatic transmission for a vehicle to which the tap hole of the transmission case internal fitting member of the present invention is applied. In the diagram 1...Transmission case 2...Inner fitting member 3
...Tap hole 3A...Female thread 100...Automatic transmission Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1) A tap hole of an internal fitting member of a transmission case, characterized in that the internal fitting member attached to the inner periphery of the transmission case is provided with a tap whose inner periphery is female threaded. 2) The tapped hole of the transmission case fitting member according to claim 1, wherein the tapped hole is provided to penetrate the internal fitting member.