JPS60121364A - Lubricating device of bearing portion of extension housing in automatic speed change gear - Google Patents

Abstract

PURPOSE:To supply the stable quantity of lubricating oil to a spline portion by disposing a lubricating oil path having a throttle in the interior thereof in an output shaft and providing an oil sump weir for intercepting lubricating oil on the forward end side of the spline fitting portion. CONSTITUTION:A lubricating oil path 72 having an opening 71 at the back 31 is axially formed in an output shaft 3, and the lubricating oil path 72 is provided with a throttle 73 for adjusting the oil quantity of lubricating oil. An oil sump weir 76 for intercepting lubricating oil is disposed on thd forward end side of a spline fitting portion 30. In this arrangement, lubricating oil in the lubricating oil path 72 is adjusted by the shrottle 13, and the lubricating oil is jetted out through the throttle 73 by oil pressure and centrifugal force to forcedly lubricate spline fitting portion 30A. Lubricating oil supplied to an oil sump 77 continuously lubricates a radial bearing 26. Accordingly, the stable quantity of lubricating oil can be supplied to the spline portion regardless of shift position and car velocity.

Description

DETAILED DESCRIPTION OF THE INVENTION Field E] The present invention relates to a lubricating device for a bearing portion of an extension housing of a vehicle transmission.

[Prior Art] A sleeve yoke supported by a bearing part of an extension housing that constitutes an output shaft arm portion of a vehicle transmission case, a spline on the yoke, and a spline on the output shaft are conventionally fitted with splines to reduce swaying resistance. For grease application,
Ricobrite treatment, nylon coating, etc. have been carried out. However, in the conventional type, the spline sliding resistance increases due to the influence of the shift position, vehicle speed, vehicle posture, temperature, etc., which prevents smooth rotation of the output shaft and causes output loss. Furthermore, since the sliding resistance increases, problems arise such as deterioration of the object to be slid and deterioration of other members related to the deterioration of the object to be slid.

[Object of the Invention] An object of the present invention is to supply lubricating oil to the spline portion of the bearing of the extension housing in order to reduce the sliding resistance of the spline portion of the bearing of the extension housing.
To provide a lubricating device for a bearing part of an extension housing of an automatic transmission, which supplies a stable amount of lubricating oil to a spline part without being affected by medium speed, vehicle posture, temperature, etc.

[Configuration of the Invention] A lubricating device for a bearing portion of an extension housing of an automatic transmission according to the present invention includes a transmission case,
The problem is the gear transmission installed inside the transmission case.
■Transmission mechanisms such as belt-type transmission mechanisms and planetary gear transmission mechanisms,
an extension housing to which a valve body of an oil pan control device is fastened to the lower surface of the transmission case and connected to the transmission case of the automatic transmission; an output shaft of the transmission mechanism provided within the extension housing; A bearing for an extension housing of an automatic transmission consisting of a sleeve yoke that is spline-fitted to the rear end of an output shaft, inserted into the bearing of the extension housing via a bearing and an oil seal, and the rear end of a center hole is closed. In the lubricating device of this section, a lubricating oil passage formed in the axial direction within the output shaft and opening at the rear end, a throttle provided in the lubricating oil passage for adjusting the amount of lubricating oil, and a center of the sleeve yoke. A cover installed to close the hole, and a cover installed on the tip side of the spline fitting part from the bearing part of the extension housing to the lance transmission case to dam the lubricating oil spouted out due to rotation of the output shaft. It consists of a gutter-like protrusion that protrudes in the direction, and an annular plate that is coaxially arranged with the output shaft fixed to the tip of the gutter-like protrusion, and the annular plate is engaged by a locking part that protrudes from the inner wall of the extension housing. The lubricating device is supported from the upper part and has an oil sump weir supported at the tip of the trough-like projection at the lower part.

[Effects of the Invention] With the above configuration, the lubricating device for the bearing portion of the extension housing of the automatic transmission of the present invention has the following effects.

b) Since the oil sump weir is provided, the sliding resistance of the spline fitting part can be reduced by 5-5 by supplying lIVI lubricant to the spline fitting part of the extension housing bearing.

Since the oil sump weir is provided, a stable amount of lubricating oil can be supplied to the bearing part of the extension housing without being affected by the shift position.

c) Since the oil sump weir is provided, a stable amount of lubricating oil can be supplied to the bearing part of the extension housing without being affected by the rotational speed of the output shaft.

2) Since an oil sump weir is installed, a stable amount of lubricating oil can be supplied to the bearing part of the extension housing without being affected by the vehicle's posture.

e) Since the oil sump weir is provided, a stable amount of lubricating oil can be supplied to the bearing part of the extension housing without being affected by the viscosity coefficient of the lubricating oil.

f) An oil sump weir is installed to prevent lubricating oil and maintain the oil level above the lowest end of the bearing.

[Embodiment] A lubricating device for a bearing portion of an extension housing of an automatic transmission according to the present invention will be described based on an embodiment shown in the drawings.

-〇- In this embodiment, the lubricating device 1 for the bearing portion of the extension housing of the automatic transmission of the present invention includes a transmission case 22, a hydraulic control device 23 fastened below the transmission case 22, and the above-mentioned 1 to transmission cases. The present invention is applied to an automatic transmission 2 for a vehicle with four forward speeds and one reverse speed, including an overdrive (OD) consisting of an extension housing (hereinafter referred to as housing) 4 connected to the housing 22 and an output shaft 3 provided within the housing 4. Ru. This vehicular automatic transmission 2 includes a torque converter overdrive (OD) device, a torque converter housing (not shown) containing an input shaft of the automatic transmission, an intermediate shaft 20 connected to the input shaft, and a planetary A transmission case 22 has a built-in transmission 21 with three forward speeds and one reverse speed, which is equipped with a gear transmission mechanism, a clutch, and a brake, and a transmission case 22 that is fastened to the lower surface of the transmission case 22 and houses valves having these various functions, and transmits a speed change signal. A shift valve that switches the oil path by the switch, a throttle valve that outputs a gear shift signal, an oil pump that is a source of oil pressure, a valve body 24 that is equipped with a hydraulic control device 23, an oil pan 25 that houses the valve body 24, and a transmission case. An output shaft 3 is fastened to the rear end of the output shaft 3 by a bolt (not shown), connected to the intermediate shaft 20, and has an outer spline 33 formed at the rear part 31. A spline fitting portion 30A is formed between an extension housing (hereinafter referred to as housing) 4 that incorporates an electronic vehicle speed sensor 27, and an outer spline 33 and an inner spline 63 of the output shaft 3, and a bearing (radial bearing) 26 is A sleeve yoke 6 supported by the bearing portion 5 of the housing 4 through
and a lubricating device 7.

The bearing portion 5 of the housing 4 is equipped with an oil seal 43 on the inner peripheral side 42 of the protruding portion 41 that protrudes rightward in the figure to prevent foreign matter from entering the output shaft 3 from the outside and to prevent lubricating oil from leaking. A dust cover 45 is installed on the outer circumferential side 44 to prevent foreign matter from entering the oil seal 43 from the outside, and a gutter-like protrusion 46 protrudes toward the transmission case 22.
The tip 47 is fixed to oil cooking which will be described later. Further, an oil passage hole 5A is formed in the upper part of the bearing portion 5 in the drawing. Each clutch and brake is engaged or released by various switching of a plurality of valves in the hydraulic control system @ 23 according to the engine output and the vehicle speed, for example, four forward gears including overdrive or One reverse gear shift is performed by manual switching.

The sleeve yoke 6 consists of a sleeve part 61 and a hub part 62. The sleeve part 61 forms the inner spline 63 that fits with the outer spline 33 on the inner circumferential side 61a, and the radial bearing 26 on the outer circumferential side 64. It is rotatably supported by the housing 4 via the housing 4.

The lubrication system @7 is formed inside the output shaft 3, and includes a lubrication oil passage 72 having an open lower part 1 at the rear part 31, and a lubrication oil passage 72 provided near the open lower part 1 of the lubrication oil passage 72. a diaphragm (orifice in this embodiment) 739- for adjusting the amount, a cover 74 attached to close the center hole 60a of the sleeve yoke 6, the gutter-like protrusion 46, and the tip of the gutter-like protrusion 46. 47 and is arranged coaxially with the output shaft 3. The annular plate 75 has an upper part 76a supported by a locking part 48 protruding from the inner wall 49 of the housing 4, and a lower part 76b. consists of an oil cooker 76 supported by the tip 47 of the gutter-like protrusion 46, which dams up the lubricating oil that lubricates the spline fitting part 30A and maintains the oil level above the lowermost end 26a of the radial bearing 26. The oil cooking 76 has one end 66a fixed to the outer circumferential side 65a of the root part 65 which forms the oil reservoir 71 together with the gutter-like protrusion 46, and the other end 66b is a dust cover arranged parallel to the inner circumferential side of the dust cover 45. It consists of a cover 66 and a hub part 62.
is connected to a universal joint 69 via a bearing 67 and a seal 68 on the inner peripheral side 62a, and the universal joint 69 is connected to a propulsion shaft 70.

In this configuration, lIl! in the ff1l oil passage 72! The amount of lubricating oil is adjusted by the orifice 73, and it is ejected from the orifice 13 by hydraulic pressure and centrifugal force, and as the output shaft 3 rotates, the lubricating oil is forced to slide on the 10-spline fitting part 30A as shown by the arrow. . The lubricating oil supplied to the spline fitting portion 30A is supplied to the oil reservoir 17, and the lubricating oil supplied to the oil reservoir 77 continuously lubricates the radial bearing 26. Further, by 30 rotations of the output shaft, 1llll of lubricating oil spreads around and lubricates other members such as the oil seal 43.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the RA arrangement of the bearing portion of the extension housing of an automatic transmission according to the present invention. In the diagram: 1... Lubricating device for the bearing part of the extension housing of the automatic transmission 2... Automatic transmission for a vehicle 3
...Output shaft 6...Sleeve yoke 7...Lubrication device 16...Oil reservoir agent Kenji Ishiguro 11- JP-A-Sho Go-121364 (5)

Claims (1)

[Scope of Claims] 1) An extension housing fastened to a transmission case of an automatic transmission having a speed change mechanism provided therein and a valve body of a hydraulic control device fastened to the bottom surface;
The output shaft of the transmission mechanism provided in the extension housing is spline-fitted to the rear end of the output shaft and inserted into the bearing part of the extension housing via a bearing and an oil seal, so that the rear end of the center hole is closed. A lubricating device for a bearing part of an extension housing of an automatic transmission consisting of a detached sleeve yoke, which includes a lubricating oil passage formed in the axial direction within the output shaft and opening at the rear end, and a lubricating oil passage provided within the lubricating oil passage. Ill, ill! lA throttle for adjusting the amount of lubricating oil and a spouted out 8 yen provided at the tip of the spline fitting part! 1. A lubricating device for a bearing portion of an extension housing of an automatic transmission, characterized in that the lubricating device is provided with an oil sump weir for damming clean oil. 2) The oil sump weir includes a gutter-like protrusion protruding from the bearing portion of the extension housing toward the lance transmission case, and an annular plate coaxially arranged with the output shaft fixed to the tip thereof. Claim 1, wherein the annular plate is supported from the upper part by a locking part protruding from the inner wall of the extension housing, and the lower part is supported by the tip of the trough-like protrusion. fli device for a bearing portion of an extension housing of an automatic transmission as described in 2.