JPS6088266A - Transmission for car - Google Patents

Abstract

PURPOSE:To reduce the quantity of necessary parts by constituting, into single planetary system, a planetary gear apparatus for switching advance and retreat with which the direction of revolution of an output shaft can be switched between the normal and reverse directions, in a belt-type continuously variable transmission in which speed change ratio can be varied steplessly. CONSTITUTION:The power of an engine is transmitted to axles 20 and 22 through a belt-type continuously variable transmission 12, planetary gear apparatus 14 for switching advance and retreat, planetary gear apparatus 6 for deceleration, and a differential gear apparatus 18. In this case, the planetary gear apparatus 14 is constituted of a sun gear 56 fixed onto the output shaft 36 of the continuously variable transmission 12, carrier 60 for supporting a planetary gear 58 engaged with the sun gear 56, brake 64 installed between the carrier 60 and a non-rotary member 62, ring gear 68 engaged with the gear 58 installed onto a transmission shaft 66, and a clutch 70 installed between the transmission shat 66 and a fixed rotary body 46. The transmission shaft 66 can be revolved in the same direction or in the reverse direction with respect to the output shaft 36 by selectively operating the brake 64 or the clutch 70.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an H7 type continuously variable transmission that changes the gear ratio steplessly, and an output shaft of the Held type continuously variable transmission.

A type of prior art automobile transmission device includes a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley with a variable pulley that is installed on the input shaft and the output shaft, respectively, and a variable pulley with a variable pulley that has a variable pulley with a variable pulley. The rotation of the input shaft, which is driven by the engine C times φi, is steplessly shifted and output from the output shaft. b
) There is a device that has a transmission shaft for transmitting power to the i&stage device and is equipped with a planetary gear device for forward/reverse switching that switches the rotation direction of the transmission shaft in the same direction or in the opposite direction with respect to the output shaft. .

The M Hoshi Yamanaka device for forward/reverse forward/reverse of the A-type transmission is designed to have a total gear ratio of 71 in the radial direction of the A double planetary gear type M star gear mechanism with two planetary gears each was used. However, the automobile transmission system using this type of forward/reverse tJJ II foot gear device has the disadvantage that the number of parts increases, the mechanism becomes complicated, and the transmission becomes large.

Purpose of the Invention The present invention has been made with the above circumstances in mind, and its object is to provide a vehicle with a relatively small number of parts, a relatively simple mechanism, and a small size. An object of the present invention is to provide a step-change transmission.

In the device, this planetary gear device for forward/forward switching is (
1) a sun gear connected to the output shaft of the continuously variable transmission;
(2) A brake installed between a non-rotating part and a carrier that supports a planetary gear meshing with the sun gear so that it can rotate and revolve on one circumference concentric with the rotation center of the sun gear; ) a ring gear provided on the transmission shaft and meshing with the ply and tarigeet; (4)
It is characterized by including a clutch provided between the transmission shaft and the output shaft.

Effects of the Invention With this structure, each time the brake and the clutch are selectively operated, the transmission shaft for the M star gear for forward/reverse switching becomes the output shaft of the rotary continuously variable transmission. The rotation direction can be switched to the first or second rotation direction by turning the wheel. At this time, for forward direction switching & star gear device boo): ? Since the tari gear is a songle type with one "9" ζ in the radial direction of the sun gear, the number of parts of the planetary gear device is suppressed, the mechanism is located in the cylinder, and the automotive transmission has the effect of becoming smaller. It is.

Embodiment Hereinafter, one embodiment of the present invention will be explained in detail based on the drawings.

In FIG. 1, the power of an engine (not shown) is supplied by a fluid coupling IO, a Held type continuously variable transmission 12, an M star gear device 14 for forward IP forward switching. Reduction planetary gear device 16. A wheel (not shown) connected to the Jj axis 20.22 directly or via a universal joint via the differential gear device 18
It is designed to be transmitted to each of the following.

jf! J The fluid coupling 10 is a pump blade that is fixed concentrically with the engine crankshaft and rotates together with it! j 24, a turbine impeller 28 connected to the human power shaft 26 of the continuously variable transmission 12, and a direct coupling clutch 30.
The rotational force of the engine is transmitted to the human power shaft 26 via fluid (ura), but when the direct coupling clutch 30 is activated, the engine's crankshaft and the input shaft 26 rotate in one direction. It is now possible to Note that 32 is a hydraulic pressure generating pump, which is connected to the crankshaft via a connecting shaft 34 passing vertically through the input shaft 26.

The heald type continuously variable transmission 12 includes variable pulleys 38 and 40 with variable self-effective diameters provided on the input shaft 2 and the output shaft 36, respectively, and windings 1. The transmission belt 42 is provided with a twisted conduction belt 42. The variable pulleys 3B and 40 are fixed rotating bodies 44 and 46 fixed to the input shaft 26 and the output shaft 36, respectively.
and movable rotary bodies 48 and 50, which are movable in the axial direction of the input shaft 26 and the output shaft 36 and non-rotatable relative to the axes. 50 is hydraulically moved (moved in the axial direction by a double hydraulic cylinder 52 and a cylinder 54, respectively), and 1 is a fixed rotating body. 44 and the movable rotating body 48,
A; and the width of the groove Vh1 formed between the fixed rotary body 4 [i and the movable rotary body 50 are changed, respectively, and the transmission belt 42 is hooked II (rIJ variable boo'J 3 )+,
1, t and 400) can be changed. Here, the conductive heald 42 is generally composed of an endless tape-shaped hoop and a large number of blocks stacked along the hoop.

jii+reverse switching planetary gear device 14 is - Ruto (
The connector 5 is fixed to the output shaft 36 of the continuously variable transmission 12.
6 and its Zankito 56, which is concentric with the center of rotation and supports the Brightly Gear 58 that meshes with the Zangya 56 on its circumference so as to be able to rotate and revolve. 1-Yariaro 0,
The carriers () and non-rotating parts such as the transmission housing (
A ring key 64 (provided between AC3) and a ring key 64 provided on the transmission shaft 66 as the output shaft of the planetary gear device 14 for forward/reverse switching, and a ring key 64 that is provided between the drive gear 58 and the Dr'i jj. 8, and a clutch 7 provided between the transmission shaft 66 and the fixed rotating body 46 fixed to the output shaft 3G.
0 and 4N, Bray; P 64 Mata LL Kurano'
J-70 かIN-rl'Jl こ 1小时・1すjさ、I! The transmission shaft 66 rotates in the opposite direction or in the same direction as the output shaft 3 [i]. 1. The sea urchin is turning.

The planetary gear device 16 for reduction includes a Zangee 72 fixed to the transmission shaft 66, a ring gear 74 fixed to the non-rotating part 62, and a carrier 78 supporting a plastic gear 76 that meshes with the Zangito 72 and the ring gear 74. The rotation of the guide shaft 66 is decelerated and transmitted to the intermediate shaft ε to which the carrier 78 is fixed.

In addition, the driving gear 1j device I8 includes a differential pinion 82 supported by the intermediate shaft 80, and a differential gear 11 and the differential gear 82.
A row of differential gears 11j84 are connected to each other so that the rotational force of the intermediate shaft E(0 is equally transmitted to the axles 20 and 22 fixed to the large differential gear 84, respectively. There is.

Note that one axle 20 is an output shaft 36. The transmission shaft 66 and the intermediate shaft 80 are passed through longitudinally, and they are located concentrically.

In the automobile transmission having the two-shaft configuration as described above, when the brake 62 and the clutch 7o are in an inoperative state, the output shaft 36 of the continuously variable transmission 12 rotates and the clutch 7o rotates. Since the carrier () () is also rotated, the rotational force of the output shaft 3G is not transmitted to the transmission shaft 6 ().

Next, when the clutch 70 is actuated and the output shaft 36 and the transmission shaft 66 are connected, they output 1
IQt+3G and the transmission shaft 66 are directly connected to transmit power. Therefore, the rotational force of the engine transmitted to the output shaft 36 is further transmitted to the downstream device via the engine shaft 70 and the transmission shaft 66, and the automobile is driven in the forward direction. Note that, at this time, the brake 64 is in an inoperative state and is in the clear state, so the carrier 60 and the person supported by it: the grain gear 58 rotate integrally with the output shaft 36.

Next, the brake 64 is actuated and - Toyaria 60
When Zangito 56 is in a non-rotating state, the rotation of Zangito 56 is transmitted to Link Gitro 8 via planetary gears and 58.
, the rotation direction is changed to the opposite direction and the output shaft 3 f
The rotation of i is decelerated and transmitted to 6 by conduction. This causes the car to be backed up. At this time, the control device (not shown) changes the speed of the bell afterglow type continuously variable transmission 12 to the side where the output shaft 36 accelerates compared to when the vehicle starts moving forward. Driven at the same 1-tal gear ratio when traveling backwards and backwards,
L It's turning into a sea urchin. Therefore, the same pitching ability can be obtained when moving backwards as when moving forward.

As described above, according to this embodiment, since the planetary float gear device 14 for forward/reverse switching is a so-called single planetary gear type planetary gear device, the double planetary gear 1/type 'M foot gear device is used for forward/reverse switching. Compared to the case where it is used, there are fewer parts, 11 mechanisms are placed in the cylinder, and the transmission has the advantage of being smaller.

In addition, even when reversing, the control device allows the vehicle to
The output shaft 3 of the heald type continuously variable transmission 12 compared to the time when the forward movement starts.
The rotational speed of 6 is the speed increasing side. Since the gear ratio is controlled to 1 and 1, there is an advantage that the same 1-Talguito ratio can be obtained during forward and backward travel.

Since the output shaft 36 and the transmission shaft 6G are directly connected, there is an advantage that 1) the power loss caused by the I reverse switching planetary gear device 144 is almost eliminated.

Further, in place of the fluid coupling 10 described above, a power intermittent device such as a torque concentric centrifugal crunch or an electromagnetic powder clutch may be used.

It should be noted that the "double series" is merely one embodiment of the present invention, and the present invention is subject to various changes and improvements without departing from the spirit thereof.

FIG.

12: Belt type continuously variable transmission 14: Planetary float device for forward/reverse switching 26 Two-man power shaft 36: Output shaft 56: Zankiya 58: Planetary gear 60: Carrier 62: Non-rotating part shrine 64: Flake 66: Transmission shaft 68: Ring gear -1-70: Krasochi

Claims (1)

[Claims] An input shaft and an output shaft, a variable pulley with a variable effective diameter provided on the input shaft and the output shaft, respectively, and a conduction 9-root wound 111 times between the variable pulleys. has
A belt-type continuously variable transmission in which the rotation of the human power shaft rotationally driven by an engine is steplessly changed and outputted from the output shaft, and a transmission shaft for transmitting power to a subsequent device is white, A forward/reverse switching device for switching the direction of rotation of the transmission shaft in the same direction or in the opposite direction with respect to the shaft is connected to the output shaft of the continuously variable transmission, and is concentric with the rotation center of the Zangya. A brake provided on the transmission shaft and provided between a planetary gear meshing with the sun gear, a carrier supporting the sun gear so that it can rotate and revolve, and a non-rotating part; A ring gear 4 that meshes with 1 and a flannel installed between the transmission shaft and the output shaft.