JPS60252870A - Speed changer equipping belt-type continuously variable transmission - Google Patents

Abstract

PURPOSE:To enable a reduction gear to be disassembled and reassembled separately from an auxiliary speed changer, by separably fitting a rotary shaft of the reduction gear to the rotary shaft of an output pulley in a belt-type continuously variable transmission (CVT) and an output element of the auxiliary speed changer. CONSTITUTION:This speed changer comprises a belt-type continuously variable transmission (CVT), auxiliary speed changer and a reduction gear 300 or the like. And an output shaft 310 of the reduction gear arranged in an output side of the auxiliary speed changer is separably mounted to a carrier 222, being an output member of the auxiliary speed changer, and a rotary shaft 180 of an output pulley of the belt-type CVT. Accordingly, the reduction gear, even when work of its disassembly and reassembly is performed, enables the work to be performed without causing the auxiliary speed changer to be influenced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission equipped with a belt-type continuously variable transmission, which is mounted on a vehicle such as an automobile.

[Conventional technology]

2. Description of the Related Art Transmissions equipped with belt-type continuously variable transmissions have recently been proposed as transmissions for vehicles such as automobiles.

A belt type continuously variable transmission has an input pulley and an output pulley each having a circumferential groove with a V-shaped cross section on one rotating shaft and the other rotating shaft. The rope is wrapped around the handle and handed over. By relatively changing the width of the circumferential grooves on the ■-shaped cross sections of the input pulley and output pulley, the rotational power is transmitted at a stepless speed from one rotating shaft to the other. It has become.

The belt type continuously variable transmission is configured to only change speed in one direction, and cannot change speed in reverse, that is, to change forward or backward. For this reason, in order to use it as a transmission for vehicles such as automobiles, it is necessary to attach the belt-type continuously variable transmission.
An auxiliary transmission device including a forward/reverse switching transmission mechanism is provided. The auxiliary transmission device is often disposed on the output side of the belt-type continuously variable transmission because the belt-type continuously variable transmission can be made compact. Further, the auxiliary transmission is often provided with a forward/reverse switching transmission mechanism and a transmission mechanism with approximately two forward speeds. For this reason, the auxiliary transmission is configured using a planetary gear device, and the planetary gear device is equipped with a clutch device and a brake device. The auxiliary transmission is arranged on the rotating shaft of the output shaft of the belt type continuously variable transmission.

Further, the belt type continuously variable transmission is provided with a reduction gear device in order to supplement the speed ratio obtained by the belt type continuously variable transmission. The reduction gear device is constituted by a normal gear device that is made up of meshing large and small gears with different diameters. This reduction gear device is usually
Located on the output side of the belt type continuously variable transmission. Since the auxiliary transmission is arranged on the output side immediately after the belt-type continuously variable transmission, the reduction gearing is arranged after this auxiliary transmission.

One axis of the rotation shaft of the gear of the reduction gear device is arranged coaxially with the rotation shaft of the output pulley of the belt type continuously variable transmission, and the rotation shaft of this reduction gear device constitutes an auxiliary transmission device. The output members of the planetary gearing, for example the carrier, are rotationally connected together so that power is transmitted from the auxiliary transmission to the reduction gearing. In this case, the output member of the planetary gear device, such as the carrier, is usually formed integrally with the rotating shaft of the reduction gear device in the axial direction as well.

[Problem that the invention seeks to solve]

As mentioned above, if the power transmission connection between the auxiliary transmission and the reduction gear is made inseparable and integral in the axial direction, when the reduction gear is replaced or repaired, the auxiliary transmission is The problem is that the auxiliary transmission must also be disassembled and reassembled, making replacement and repair work difficult.

In addition, lubrication is required for the lubrication points such as the bearings of the auxiliary transmission installed on the rotating shaft of the output pulley, and a lubrication passage must be provided for this purpose. Since it is located at an intermediate position between the transmission and the reduction gear, there is a problem in that it is difficult to construct a lubrication passage.

Therefore, the problem to be solved by the present invention is that the auxiliary transmission device installed attached to the belt type continuously variable transmission device is located at an intermediate position between the belt type continuously variable transmission device and the reduction gear device. Even when installed in The purpose is to do so.

[Means for solving problems]

The present invention connects the output member of the auxiliary transmission device and the rotating shaft of the reduction gear device to each other in the rotational direction but in a separable manner in the axial direction. The above-mentioned problems are solved by arranging the shaft and the rotating shaft coaxially, fittingly connecting the two wheels so as to allow relative rotation, and providing a lubrication passage communicating between the two shafts.

Specifically, the transmission equipped with the heald type continuously variable transmission device according to the present invention takes the following measures.

In other words, an auxiliary transmission device consisting of a planetary gear device is arranged on the rotation shaft of the output pulley of the belt-type continuously variable transmission, and the rotation shaft of the reduction gear device is coaxial with the output pulley rotation shaft. It is provided so as to be separable from and relatively rotatably fitted to the rotation shaft of the pulley. The rotation shaft of the reduction gear device and the rotation shaft of the output pulley are provided with a lubricant passageway that opens at the shaft end of the rotation shaft of the reduction gear device and is provided in communication with the rotation shaft of the output pulley. A seal member is provided at the fitting portion of the rotation shaft of the reduction gear device and the rotation shaft of the output pulley, and the output member of the planetary gear device of the auxiliary transmission is connected to the rotation shaft of the reduction gear device. They are spline-fitted and are integral in the rotational direction, but are separable in the axial direction.

[Effect]

According to the above-mentioned means, the rotation shaft of the reduction gear device is separably fitted in the axial direction with the rotation shaft of the output pulley and the output member of the auxiliary transmission device such as the carrier. Disassembly and assembly can be performed without affecting the auxiliary transmission.

In addition, lubricating oil is supplied to the lubricating parts of the auxiliary transmission through a lubrication passage provided by connecting the rotating shaft of the reduction gear device and the rotating shaft of the output pulley, and connecting the two shafts. It will be done. The lubricating oil is supplied to this lubricating passage from the shaft end of the reduction gear device, since the lubricating passage opens at this shaft end. Note that a sealing member is provided at the fitting portion of the rotating shaft of the reduction gear device and the rotating shaft of the output pulley, so that the lubricating passage is kept oil-tight and a good supply of lubricating oil is ensured.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 and 2 show an embodiment according to the invention.

Fig. 1 shows a sectional view of the detailed structure of a transmission equipped with a belt-type continuously variable transmission; Fig. 1+a+ is a sectional view of the lower part;
FIG. 1 (bl shows a cross-sectional view of the upper part.

FIG. 2 shows a skeleton diagram of the transmission shown in FIG. 1.

The transmission of this implementation 11FI7 is as shown in FIG.
Broadly speaking, it consists of a fluid coupling device 5o, a belt type continuously variable transmission 100, an auxiliary transmission 200, a deceleration gear device 300, and a differential gear device 350.

Each of these devices is installed within the case member of the transmission. The case member is fluid coupling case member 1
0, a main case member 12, and a cover member 14.

Each of these case members forms a chamber that accommodates each device. A fluid coupling device chamber 52 is formed by the fluid coupling case member 1o, and a fluid coupling device 50 is arranged therein. A belt-type continuously variable transmission chamber 102 is formed by the main case member 12 and the cover member 14, and the belt-type continuously variable transmission 1o
o is placed. Further, as seen in FIG. 2, an auxiliary transmission chamber 202 is formed by the main case member 12 at a lower position of the main case member 12, and an auxiliary transmission device 200 is disposed therein. Furthermore, as seen in FIG. 2, a differential chamber 302 is formed by the fluid coupling case member 1o at a lower position of the fluid coupling case member 10, and a deceleration gear device 300 and a differential gear device 350 are arranged. has been done.

Next, each device will be explained.

Fluid Coupling Device 50 The fluid coupling device 50 includes a fluid coupling 54 and a direct coupling clutch 60. The fluid coupling 54 includes a pump impeller 56 and a turbine impeller 58. The pump impeller 56 is connected to an engine crankshaft (not shown), and the turbine impeller 58 is connected to the engine crankshaft (not shown).
is connected to a rotating shaft 104 of a large force pulley 110, which serves as an input shaft of the belt type continuously variable transmission 1000. As is well known, the fluid compression ring 54 transmits power through fluid (oil), and transmits the rotational power of the engine to the belt type continuously variable transmission 100.

The direct coupling clutch 60 directly transmits the rotational power of the engine to the rotating shaft 104 of the input pulley 110 by its operation. When power is transmitted via the fluid coupling 54, since it is a fluid transmission, it is transmitted with slippage and deceleration; however, when using the direct coupling clutch 60,
It is transmitted as is without any slippage. This direct clutch 6
o is provided to improve the so-called fuel consumption rate, and is normally activated when driving at high speeds.

Note that, as shown in FIG. 1 (Tb), the oil pump 70 is located at the rear position of the fluid coupling 54 (FIG. 1 (bl)).
It is located at the left position (when viewed from the front). oil pump 70
is driven by a rotation transmission member 72 integrated with the pump impeller 56 to generate hydraulic pressure.

The oil pressure is used to control a belt-type continuously variable transmission 100 and an auxiliary transmission 200, which will be described later.

It is also used for hot water.

Belt Type Continuously Variable Transmission 100 The belt type continuously variable transmission 100 includes an input coupler 11O and an output pulley 150. The input pulley 110 consists of a fixed pulley 112 and a movable pulley 114.

The fixed pulley 112 is formed integrally with the rotating shaft 104, and the movable pulley 114 is fitted and attached to the rotating shaft 104. As best shown in Figure 1 (bl),
The rotating shaft 104 and the movable pulley 114 are attached with a pawl 120 that engages with axial grooves 117 and 118 formed on both sides. Although it is movable, it remains integral in the direction of rotation.

The rotation shaft 104 of the input pulley 110 is rotatably supported by the partition member 12a of the main case member 12 and the cover member 14 on both sides via bearings 122 and 124.

Opposing pulley surfaces 112a and 114a of the fixed pulley 112 and the movable pulley 114 are formed in a circumferential groove 116 having a 7-shaped cross section. A transmission belt 190 is wound around this circumferential groove 116. Note that the width of the circumferential groove 116 is the same as that of the movable boot 1711.
4, the effective diameter around which the transmission belt 140 is wound can be changed. In FIG. 1(b), the human pulley 110 is shown with different effective diameters above and below the center line CL. The illustrated state in the upper half shows the minimum effective diameter state of the transmission bell l-190, and the illustrated state in the lower half shows the maximum effective diameter state. Note that the movable pulley 114 is moved in the axial direction by a hydraulic cylinder device 130 at the back.

The output pulley 150 is also configured roughly in the same way as the manual pulley 110. That is, it consists of a fixed pulley 152 and a movable pulley 154, and the movable pulley 154 is fitted and attached to a rotating shaft 180 that is integrated with the fixed pulley 152. The movable pulley 154 is the input pulley 110
As with the movable pulley 114 of the axial groove 156 .
15B and the ball 160, it is attached to the rotating shaft 180 integrally in the rotational direction but movable in the axial direction. Note that the arrangement of the fixed pulley 152 and the movable pulley 154 of the output pulley 1.50 is left and right opposite to that of the input pulley 110. This is to maintain the positional state of the power transmission belt 190 in a straight state when the widths of the circumferential grooves 116, 166 of the manual pulley 110 and the output pulley 150 are changed.

The rotation shaft 180 of the output pulley 150 is also connected to the input turn-IJ'
110, bearings 162 are attached to the partition wall member 12a of the main case member 12 and the cover member 14 on both sides.
．． 164.

As seen in FIG. 1(b), the right end portion of the rotating shaft 180 is formed separately from an auxiliary transmission device 200 and an output shaft 310 of a reduction gear device 300, which will be described later, so that it can be extracted from these devices. There is. That is, they are formed to be separable.

Further, the opposing boo surfaces 152a and 154a of the fixed pulley 152 and the movable pulley 154 have a circumferential groove 166 having a V-shaped cross section.
The circumferential groove 166 of this output pulley 150
Insert the transmission belt 19 into the circumferential groove 116 of the input turnip IJ 110.
0 is wrapped around it. The output pulley 150 also moves the transmission belt 190 due to the axial movement of the movable pulley 154.
The effective diameter of the position where it is wrapped can be changed. The axial movement of the movable boo 17154 is controlled by a hydraulic cylinder device 170 provided at the back. In FIG. F(b), the illustrated state of the upper half of the output pulley 150 indicates the minimum effective diameter state, and the illustrated state of the lower half indicates the maximum effective diameter state.

As shown in FIG. 1 (bl), the transmission bell 190 is composed of an endless carrier 192 and a power transmission block 194.The endless carrier 192 is formed by laminating a plurality of thin metal hoops. A plurality of power transmission blocks 194 are arranged adjacent to each other in a daisy chain on the pair of endless carriers 192 formed in this manner, thereby forming a power transmission belt 190.

The belt-type continuously variable transmission 100 is configured as described above, so that the input power is transmitted through the transmission belt 190.
Power is transmitted from J 110 to output pulley 150,
At this time, by changing the effective diameter of the input pulley 110, the speed is continuously changed and transmitted to the output pulley 150.

Auxiliary transmission device 200 The auxiliary transmission device 200 is disposed on the output side of the belt type continuously variable transmission device 100, and is connected to the rotation shaft 1 of the output pulley 150.
It is installed on 80. And this auxiliary transmission device 2
00 is a Ravignio type compound planetary gear unit 210, two brake devices 230, 240, and one clutch device 2.
It consists of 50.

The Ravignio type compound planetary gear set 210 has a first sun gear 212 and a second sun gear 214, a first planetary gear 216 that meshes with the first sun gear 212, and a first planetary gear 216 that meshes with the second sun gear 214. A second planetary gear 218 , a ring gear 220 meshing with the first planetary gear 216 , a first planetary gear 216 and a second planetary gear 21
Each element 1.8 of the carrier 222 rotatably supports an element 1.8. :
It consists of ;

The clutch device 250 and the brake device 240 are configured in a well-known friction multi-plate engagement type. Further, the brake device 230 is configured in a well-known brake band type.

Each element of the above-described Ravignio type compound planetary gear device 210,
Two brake devices 230, 240 and one clutch device 250 are connected between the rotating shaft 180 of the output pulley 150 and the output shaft 310 of the reduction gear device 300 as follows.

The first sun gear 212 is connected to the rotating shaft 180 via a clutch device 250, and the second sun gear 214 is directly connected to the rotating shaft 180 by spline fitting. Further, the first sun gear 212 is provided with a brake device 230 between it and the partition wall member 12a. Similarly, ring gear 2
20 is provided with a brake device 240 between it and the partition wall member 12a.

The carrier 222 serves as an output member and is connected to the output shaft 310 of the reduction gear device 300 by spline fitting. That is, the carrier 222 and the output shaft 310
They are separably connected for power transmission. □ Due to the above-mentioned connection configuration, the auxiliary transmission device 200 includes two brake devices 230 and 240 and one clutch device 2.
50 selective operation, two forward speeds.

One reverse gear stage is obtained.

First forward speed is established by placing the brake device 230 in an activated state and the clutch device 250 and brake device 240 in an inactive state. In this state, rotational power is input from the second sun gear 214, and this second sun gear 214 connects the first planetary gear 216 and the second
The planetary gear 218 is rotated, and the orbital rotation that planetarily rotates on the first sun gear 212 fixed by the brake device 230 is decelerated from the carrier 222 and taken out to the output shaft 310.

Second forward speed is established by setting the clutch device 250 in the activated state and the brake devices 230 and 240 in the non-activated state. In this state, rotational power is simultaneously input from the first sun gear 212 and the second sun gear 214, and the Ravignio type compound planetary gear set 210 is in an integrally rotating state. Therefore, the input rotation is directly output to the carrier 222.

Reverse Brake device 240 is activated, clutch device 2
50 and the brake device 230 are deactivated. In this state, rotational power is input from second sun gear 214, which rotates first planetary gear 216 and second planetary gear 218, and internal teeth of ring gear 220 fixed by brake device 240. The orbital rotation that rotates planetarily above is taken out from the carrier 222 in a reverse rotation state and at a reduced speed.

By the way, since the above-mentioned auxiliary transmission 200 is provided at a position in the power transmission path after the heald type continuously variable transmission 100, the belt type continuously variable transmission 100 can be made smaller. That is, the auxiliary transmission device 200 may be provided at a position in the power transmission path before the belt-type continuously variable transmission device 100, but in this case, the auxiliary transmission device 2
Since the torque is increased at 00, it is necessary to configure the belt type continuously variable transmission 100 to have a large capacity and large size.

However, in the case of the present invention, since the torque increase is performed after the belt type continuously variable transmission lOO, the capacity of the belt type continuously variable transmission 100 is small and can be made compact.

In addition, when the auxiliary transmission 200 is disposed before the belt type continuously variable transmission 100, the heald type continuously variable transmission 1
Since the transmission belt 190 of 00 rotates in forward and reverse directions, the use of the transmission belt 190 may be severe and its durability may be reduced. However, in the case of the present invention, since the forward/reverse switching is performed after the belt-type continuously variable transmission 100, the transmission heald 190 always rotates in the same direction, which improves the durability of the transmission belt 190. I can do it.

Reduction Gear Device 300 The reduction gear device 300 is arranged on the output side of the auxiliary transmission device 200. In this reduction gear device, a gear 312 provided on an output shaft 310 that is a rotating shaft meshes with a first gear 322 of an intermediate shaft 320, and a second gear 324 of the intermediate shaft 320 meshes with a first gear 322 of an intermediate shaft 320. is configured to mesh with the final reduction gear 330. The meshing of each of these gears is configured to rotate at a reduced speed. As a result, the rotation from the auxiliary transmission 200 is transferred to this deceleration gear device 30.
The signal is decelerated by 0 and transmitted to the differential gear device 350. Note that the output shaft 310 is supported by bearings 402 and 404 on both sides, and the intermediate shaft 320 is supported by bearings 412 and 404 on both sides.
．． 414.

The output shaft 310, which is a rotating shaft, is connected at its left end to the inner end of a carrier 222, which is an output member of the Ravignio compound planetary gear set 210, by spline fitting, as seen in FIG. are integral, but are slidable in the axial direction. That is, the output shaft 310 is coupled to the carrier 222 so as to be separable in the axial direction.

In addition, the output shaft 310 is the rotating shaft 18 of the output turn-I7150.
0, and the end of the rotating shaft 180 is inserted and fitted into the output shaft 310. A sealing member 308 such as a seal ring is provided at this fitting portion to keep the lubrication passage 314 oil-tight, which will be described later. The fitting between the output shaft 31O and the rotation shaft 1.80 is such that they are relatively rotatable and separable in the axial direction.

A lubrication passage 314 is provided at the axial center of the output shaft 310 and the rotating shaft 180 of the output pulley, which communicate with each other. The lubrication passage 314 is opened at the right shaft end of the output shaft 310 as viewed in FIG. 1, and lubricant oil is supplied to the lubrication passage 314 from this opening. Lubrication passage 3
Reference numeral 14 indicates a supply oil passage 420 that leads to a lubricating point of the auxiliary transmission 260 at the position of the rotating shaft 180 of the output pulley, so that lubricating oil is supplied to the lubricating point and WR slipping is performed. .

Further, a lubrication passage 450 is also provided at the axial center of the intermediate shaft 320, so that the bearing 412 is lubricated. Lubricating oil is supplied to this lubricating passage 450 and the lubricating passage 314 of the output shaft 310 described above from a lubricating oil supply passage 500 shown by a broken line.

In this way, the lubrication of the auxiliary transmission 200 is
The lubrication structure can be simplified by providing a lubrication passage in the rotary shaft 180 of the rotary shaft 180 and the output boom. That is, since the auxiliary transmission device 200 is arranged at an intermediate position between the belt type continuously variable transmission device 100 and the reduction gear device 300, the lubrication structure is usually complicated and difficult. 180 and output shaft 310
By providing a lubrication passage 314 in the output shaft 310 and taking in the lubrication oil from the shaft end of the output shaft 310, the lubrication oil can be easily supplied and the lubrication structure can be simplified.

Furthermore, the output shaft 310 of the reduction gear device 300 is detachably attached to the carrier 222, which is the output part of the auxiliary transmission device 200, and the rotating shaft 180 of the output pulley. Disassembly and assembly can be performed without affecting the auxiliary transmission device 200.

Differential Gear Device 350 The differential gear device 350 is provided in the final reduction gear 330 with a well-known configuration. That is, pinions 356 and 358' supported by a pinion shaft 360 are engaged with a pair of left and right side gears 352 and 354, and rotational power is transmitted from the differential case 362, through the pinion shaft 360 and the pinion off 356 and 358, to the side gears 352 and 358. 35
4 and is transmitted from the side gear 352.354 to the drive shaft 3.
70.372 to the wheels (not shown). Differential rotation of the left and right wheels is allowed by rotation of pinions 356 and 358.

〔Effect of the invention〕

As described in detail above, according to the present invention, the rotating shaft of the reduction gear device is removably fitted with the rotating shaft of the output pulley and the output element of the auxiliary transmission, so that it has no influence on the auxiliary transmission. Since the reduction gear device can be disassembled and assembled without giving any damage, the reduction gear device can be easily replaced and repaired.

In addition, lubricating oil is supplied to the lubricating parts of the auxiliary transmission by providing a lubricating passage that communicates with the rotary shaft of the output pulley and the rotary shaft of the reduction gear. Since the shaft end is opened and lubricating oil is supplied from this shaft end, the structure of the lubrication passage can be simplified.

[Brief explanation of drawings]

Fig. 1 shows the detailed structure of a transmission equipped with a heald type continuously variable transmission according to an embodiment of the present invention, Fig. 1 fa) is a sectional view of the lower part, and Fig. 1 fb) is a sectional view of the upper part. 2 are skeleton diagrams of the transmission shown in FIG. 1. Explanation of symbols 100--11-held type continuously variable transmission 150---
- Output pulley 180 - Output pulley rotation shaft 20, 0 - Auxiliary transmission 210 - Planetary gear unit 300 - - Reduction gear unit 308 - - Seal member 310 - - 1 - Output shaft (rotating shaft of reduction gearing)
314-----1 Lubricating Passage Applicant Toyota Motor Corporation

Claims (1)

[Claims] 1. An auxiliary transmission device consisting of a planetary gear device is arranged on the rotation shaft of the output pulley of the belt type continuously variable transmission, and the rotation shaft of the reduction gear device outputs coaxially with the rotation shaft of the output pulley. It is provided so as to be separable from the rotary shaft of the pulley and fit in such a manner that it can rotate relative to the rotary shaft of the pulley. A lubrication passage is provided in communication, a sealing member is provided at the fitting part of the rotation shaft of the reduction gear device and the rotation shaft of the output pulley, and the output member of the planetary gear device of the auxiliary transmission is connected to the reduction gear device. 1. A transmission equipped with a belt-type continuously variable transmission, which is spline-fitted to a rotating shaft of a gear device so that the transmission is integral in the rotational direction but can be separated in the axial direction.