KR0174167B1 - Auto-transmission - Google Patents

Abstract

In order to reduce the number of parts to reduce the manufacturing cost and to facilitate the assembly work, the transmission is formed in the housing and the receiving space is formed inside the housing, and the input shaft disposed in the transmission housing and receives the driving force of the engine and rotates; A drum shaft coupled to the outer peripheral side of the input shaft and rotatably coupled to the outer peripheral side of the power transmission member in a circumferential direction of the input shaft and one side connected to a ring gear; A transfer drive gear rotatably coupled in a circumferential direction, a bearing having an inner ring coupled to one side outer peripheral side of the transfer drive gear and an outer ring coupled to a transmission housing, and one outer peripheral surface of the drum shaft to prevent deviation of the transfer drive gear; Transfer drive gear is fixed on the A clutch means disposed on one side of the transfer drive gear and fixed to an outer periphery of the input shaft, the clutch means including a clutch hub and a clutch retainer, coupled to a bearing portion of the input shaft, and the outer peripheral side of which is connected to the transmission housing and the fastening member. It includes an automatic transmission including a rear cover coupled by.

Description

Automatic transmission

1 is a half sectional view showing a structure of an automatic transmission showing an embodiment according to the present invention;

2 is an enlarged cross-sectional view of the main part of FIG. 1;

3 is a cross-sectional view showing the structure of a conventional automatic transmission,

4 is an enlarged cross-sectional view of the main part of FIG.

* Explanation of symbols for main parts of the drawings

1: transmission housing 3: input shaft

17: transfer drive gear 23: power transmission member

27: drum shaft 29: bearing

31,45: fastening member 33: transfer drive gear fixing member

37: clutch retainer 41: clutch hub

43: rear cover

[Industrial use]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission, and more particularly, to an automatic transmission having a compact structure to improve the mountability on a vehicle and reduce the number of parts, thereby improving assembly performance.

[Prior art]

In general, the automatic transmission is installed between the engine and the propulsion shaft so that the gear selection is automatically made appropriately according to the driving state of the vehicle to maintain the proper driving state.

3 is a cross-sectional view illustrating a structure of a conventional automatic transmission, and includes a transmission housing 101 forming an exterior and forming an accommodating space therein, and being installed inside the transmission housing 101 and being rotated by a driving force of an engine. The input shaft 103 and a plurality of clutch means arranged at appropriate intervals on the outer circumference of the input shaft 103 are shown.

The rear cover 105 is fixed to the rear end of the transmission housing 101.

The input shaft 103 is the torque converter 107, the first, second, third clutch means 109 (111) 113, the double pinion planetary gear set 115, the transfer drive gear from the front side of the engine (not shown) 117, the fourth clutch means 119 is arranged.

4 is a cross-sectional view showing the main part of FIG. 3, the transmission housing 101, the input shaft 103, the transfer drive gear 117 disposed on the outer circumference of the input shaft 103, and the declutch means 119. FIG. )

The power transmission member 121 is disposed on the outer circumference of the input shaft 103 to be freely rotated in the circumferential direction.

In addition, a carrier 123 connected to the double pinion planetary gear set 115 is fixedly coupled to an outer circumferential side of the power delivery member 121.

In addition, the drum shaft 125 is disposed on the outer circumference of the upper end of the power delivery member 121 so as to be rotatable in the circumferential direction and has a structure connected to the ring gear 127 at one end thereof.

A transfer drive gear 117 is fixedly disposed on the outer circumference of the drum shaft 125 and has a structure in which rotation in the circumferential direction is performed.

An inner ring of the bearing 129 is fixedly coupled to an outer circumferential end of the transfer drive gear 117, and the outer ring is fixed to the transmission housing 101. And the other end of the outer peripheral surface of the transistor drive gear 117 is also made of a structure in which the inner ring of the bearing 131 is fixedly coupled.

The outer ring of the bearing 131 is configured to be fixed to one end of the fixing member 133 fixedly coupled to the input shaft 103 in a vertical direction on one side of the transmission.

The fixing member 133 has a structure in which one side is bolted in the axial direction with the transmission housing 101.

The fourth clutch means 119 includes a clutch retainer 137 connected to the clutch plate 135 and a clutch hub 141 including a clutch disk 139.

The clutch retainer 137 is configured to be coupled to one side of the input shaft 103.

The clutch hub 141 is coupled to the outer circumference of the power transmission member 121 and has a structure capable of rotating in the circumferential direction of the input shaft 103.

In addition, a piston 143 and a return spring 145 are interposed between the clutch retainer 137 and the clutch hub 141.

A rear cover 105 fixedly coupled to the input shaft 103 by a bearing 129 is disposed in the bearing portion of the transmission.

The front end of the rear cover 105 has a structure that is coupled to the fixing member 133.

As for the automatic transmission made in this way, power is transmitted to the input shaft 103 as the engine rotates, and each clutch means is operated so that the vehicle speed changes in accordance with the change in the driving state.

[Problems to Be Solved by the Invention]

However, the conventional automatic transmission has a complicated structure and a large number of parts, thus increasing the manufacturing cost, and in particular, the assembly work is inconvenient.

In addition, due to the large number of parts, it is difficult to manufacture a compact product, which is invariably due to lack of free space when mounted on a vehicle.

[Means to solve the problem]

The present invention has been drawn to solve the above problems of the prior art, an object of the present invention is to reduce the number of parts to reduce the manufacturing cost, to facilitate the assembly work and to provide an automatic transmission in which a compact production is made. .

In order to solve the object of the present invention, and a transmission housing forming an appearance and the receiving space therein,

An input shaft disposed within the transmission housing and rotating to receive a driving force of the engine;

A drum side having a power transmission member disposed on an outer circumferential side of the input shaft and rotatably coupled in a circumferential direction of the input shaft to an outer circumferential side of the moving force transmission member, and one side connected to a ring gear;

A transfer drive gear coupled to an outer circumferential side of the drum shaft in a circumferential direction of the input shaft;

A bearing having an inner ring coupled to an outer side of the side of the transfer drive gear and an outer ring coupled to a transmission housing;

A transfer drive gear fixing member fixedly coupled to one side of an outer circumferential surface of the drum shaft to prevent the transfer of the transfer drive machine;

A clutch means disposed on one side of the transfer drive gear and fixed to an outer circumference of the input shaft and including a clutch hub and a clutch retainer;

It is coupled to the bearing portion of the input shaft and the outer peripheral side includes an automatic transmission including a rear cover coupled by a transmission housing and a fastening member.

[Action]

The automatic transmission according to the present invention has a bearing connecting the transmission housing only at one end of the transfer drive gear and the other end fixed to the drum shaft rotation by arranging the transfer drive gear fixing member so that the transfer drive gear is not separated from the outer periphery of the drum shaft. It is supported by the bearing and transmits the torque through the transfer drive gear.

EXAMPLE

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

FIG. 1 is a half sectional view showing the structure of an automatic transmission showing an embodiment according to the present invention, which shows a transmission housing 1, an input shaft 3, and a plurality of clutch means.

The transmission housing 1 forms an appearance and has a structure in which a storage space is formed.

The pressure shaft 3 is disposed in the storage space of the transmission housing 1 described above, and has a structure in which the engine is rotated by receiving power of the engine.

The clutch means is arranged on the outer periphery of the input shaft 3 and has a structure in which the first, second, third and fourth clutch means (5) (7) (9) (11) are arranged from the front side of the engine (not shown). have.

The torque converter 13 is disposed between the engine and the first clutch means.

In addition, between the third clutch means 9 and the fourth clutch means 11, the double pinion planetary gear set 15 and the transfer drive gear 17 are arranged from the front side of the engine.

FIG. 2 is an enlarged partial sectional view of the main part of FIG. 1 according to the present invention, which shows the transmission housing 1, the input shaft 3, the transfer drive gear 17 and the fourth clutch means 11. FIG. .

The input shaft 3 has a structure in which an oil outlet 19 is formed in the middle portion in the axial direction, and a through hole 21 for supplying oil to each friction portion in the radial direction with the oil outlet 19 is formed. It is done.

In addition, one side of the input shaft 3 has a structure in which the power transmission member 23 can rotate in the circumferential direction.

In addition, the carrier 25 connected to the double pinion ring gear set 15 is fixed to an outer circumferential side of the power transmission member 23 to be rotated in the circumferential direction.

A drum shaft 27 connected to a ring gear (not shown) is formed on the outer circumference of the power transmission member 23 so as to rotate in the circumferential direction.

The outer periphery of the middle portion of the drum shaft 27 has a structure that is coupled to the transfer drive gear 17 for transmitting the driving force of the engine to the differential device so as to rotate in the circumferential direction.

One outer periphery of the transfer drive gear 17 has a structure fixed to the transmission housing 1 and the bearing 29.

The bearing 29 has an inner ring fixed to one side of the transfer drive gear 17 and an outer ring fixed to the transmission housing 1.

One side of the outer ring portion of the bearing 29 is formed to protrude in the radial direction of the input shaft (3) is made of a structure coupled to the transmission housing (1) and the fastening member (31).

The fastening member 31 may be used in various kinds, but is preferably made of a bolt.

In addition, the bearing 29 may be applied to a general ball bearing, but more preferably a double angular ball bearing is used.

In addition, the outer circumferential side of the drum shaft 27 has a structure in which the transfer drive gear fixing member 33 is fixedly coupled so that the transfer drive gear 17 is not separated.

One side of the input shaft 3 has a structure in which the fourth clutch means 11 is arranged and fixed.

The fourth clutch means 11 has a clutch tooth retainer 37 coupled to the clutch plate 35 and a clutch hub 41 connected to the clutch disk 39 disposed between the clutch plate 35. It is included.

The rear cover 43 coupled to the bearing 29 is fixedly disposed at the bearing portion of the input shaft 3.

One outer peripheral portion of the rear cover 43 has a structure coupled to the transmission housing 1 and the fastening member 45.

The automatic transmission made in this way, power is transmitted through the torque converter 13 as the engine rotates, and power is transmitted to the transfer drive gear 17 by the action of each clutch means.

At this time, the transfer drive gear 17 is supported by the transmission housing 1 through the bearing 39, so that the predetermined driving force can be transmitted to the differential device (not shown).

[Effects of the Invention]

The automatic transmission according to the present invention omits one side of the bearings disposed on both sides of the transfer drive gear, and also omits the fixing member supported on the rear cover and the transmission housing, thereby reducing the number of parts for convenient assembly. And the automatic transmission assembly can be reduced in the longitudinal direction of the overall length can be compacted.

Therefore, the mounting can be made easier when the vehicle is mounted.

Claims (4)

A transmission housing (1) forming an exterior and having an accommodation space formed therein, an input shaft (3) disposed in the transmission housing (1) and rotating by receiving a driving force of an engine, and a power on one side of an outer circumference of the input shaft (3). The transmission member 23 is disposed and is rotatably coupled to the outer circumferential side of the power transmission member 23 in the circumferential direction of the interlocking shaft 3, and one side of the drum shaft 27 is connected to the ring gear and the drum. On the outer circumferential side of the shaft 27, a transfer drive gear 17, which is rotatably defective in the circumferential direction of the input shaft 3, and an inner ring is coupled to the outer circumferential side of the side of the transfer drive gear 17, and the outer ring is a transmission housing ( 1) a bearing 29 coupled with the transfer drive gear fixing member 33 fixedly coupled to one side of the outer circumferential surface of the drum shaft 27 to prevent the transfer of the transfer drive gear 17 and the transfer drive gear. (17) It is disposed on one side and fixed to the outer periphery of the input shaft (3) and comprises a clutch hub 41 and the clutch retainer 37, coupled to the bearing portion of the input shaft (3) as a bearing and the outer peripheral side is a transmission housing ( 1) and an automatic transmission comprising a rear cover (43) coupled by a fastening member (45). The automatic transmission according to claim 1, wherein the bearing (29) consists of a double angular ball bearing. The automatic transmission according to claim 1, wherein the coupling between the bearing (29) and the transmission housing (1) is fixed by the transmission housing (1) and the fastening member (31) by protruding one side of the bearing outer ring. 4. Automatic transmission according to claim 3, wherein the fastening member (31) is made of a bolt.