JP2983274B2 - Transmission operating device - Google Patents

Description

The present invention relates to a transmission operating device provided with a rotary fluid actuator as a driving means.

b. Conventional technology Conventional piston type transmission operating device (for example,
-128207), there is a drawback in the mountability because of a large form when mounted on a transmission, and there is a disadvantage that the cost is increased. Furthermore, this type of device has a disadvantage that the transmission loss of the operating force is large.

Therefore, in order to solve such inconvenience, a transmission operating device employing a rotary type fluid actuator as a driving means of a transmission operating mechanism has been proposed (for example, see Japanese Patent Application Laid-Open No. 55-149452). In this type of device, by operating a shift lever, compressed air is supplied to a pressure chamber of a rotary type fluid actuator, and the rotating power of a rotary piston rotated thereby is directly transmitted to a shift rod to perform a shift operation. I do it.

c. Problems to be Solved by the Invention In a transmission operating device using a rotary type fluid actuator, although there is an advantage that the operating force transmission efficiency is good, and the structure is simple and small, the conventional device has: In fact, no effective proposal has been made for the positioning mechanism required for the gear shifting operation.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to improve the transmission efficiency of operating force, enable miniaturization, and accurately and accurately position a driving member. Transmission operation device.

d. Means for Solving the Problems In order to achieve the above object, according to the present invention, a rotating vane integrally fixed to a rotatable output transmission shaft and a vane main body of the rotating vane are rotatably provided. A first chamber disposed, a pair of pressure chambers in the first chamber defined on both sides of a vane body of the rotary vane, and a pressure for selectively supplying and discharging a pressure fluid to and from the pair of pressure chambers. A transmission operating device provided with a rotary type fluid actuator having a fluid supply / discharge passage; (a) provided at a position opposite to the pair of pressure chambers with respect to a rotation center of the rotary vane; and A second chamber defined by fixed walls on both sides of the pair of pressure chambers; and (b) the second chamber rotatably disposed in the second chamber.
A free piston for dividing the chamber into two pressure chambers; and (c) a position opposite to the vane body with respect to the rotation center of the rotary vane, and facing the second chamber. A stopper piece provided on an end face of the rotating vane; and (d) a stopper piece engaging portion provided on the free piston. The stopper piece of the rotating vane and the stopper piece of the free piston are engaged. The positioning of the rotary vane and thus the output transmission shaft in the rotational direction is performed by the parts.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a transmission operating device 60 to which the present invention is applied. In FIG. 1, reference numeral 61 denotes an operating rod having a spline 61a, and 62 is slidably fitted to a spline 61a of the operating rod 61. Shift and select lever, 63a,
63b, 63c, 63d are shift jaws, 64a, 64b, 64c, 64d are shift shafts, 65a is a select for moving the shift and select lever 62 in the axial direction (selection direction) of the operating rod 61 and positioning it at a predetermined select position. An operation actuator (rotary-type fluid actuator) 65b is a shift operation actuator (rotary-type fluid actuator) that rotates the operation rod 61 about its axis.

As shown in FIG. 2, the above-described select operation actuator 65a includes a fixed housing 68 having a pair of fan-shaped first and second chambers 67 and 66 at positions substantially 180 ° from each other. An output transmission shaft 69 is rotatably inserted into the center of the fixed housing 68. And
In the first and second chambers 67 and 66 of the fixed housing 68, a free piston 70 and a rotating vane 71 are housed and arranged.

That is, a fan-shaped free piston is provided in the second chamber 66.
A storage chamber 66 is divided into two by a free piston 70, and pressure chambers 72 and 73 are defined on both sides of the free piston 70. An annular portion 71a of a rotary vane 71 is integrally fixed to the output transmission shaft 69, and a first vane body 71b extending radially from the annular portion 71a is provided.
Are arranged in a room 67. Further, a stopper piece 71c radially extending from the annular portion 71a in a direction substantially opposite to the main body 71b is loosely fitted in a fan-shaped concave portion 74 formed in the free piston 70. And this recess 74
Are formed as stopper surfaces of the stopper piece 71c. Thus, the first chamber 67 is a rotating vane.
The vane body 71b is divided into two parts, and pressure chambers 75 and 76 are defined on both sides of the vane body 71b.

Therefore, in the select operation actuator 65a of this example, the select operation actuator 65a is provided at a position opposite to the pair of pressure chambers 75 and 76 with respect to the rotation center of the rotary vane 71 (the axis of the output transmission shaft 69). A second chamber 66 defined by fixed walls 68a and 68b (left and right portions of the fixed housing 68 in FIG. 2) on both sides of the pair of pressure chambers 75 and 76, and is rotatably disposed in the second chamber 66. A free piston 70 that partitions the second chamber 66 into two pressure chambers 72 and 73, and a position opposite to the vane body 71b with respect to the rotation center of the rotary vane 71, and
A stopper piece 71c provided on the end face of the rotary vane 71 facing the second chamber 66 and a concave portion (stopper piece engaging portion) 74 provided on the free piston 70 are provided.

Further, in the above-mentioned fixed housing 68, each pressure chamber 72, 73,
Passages 77, 78, 79, and 80 are formed to communicate with 75 and 76, respectively, and the compressed air is selectively supplied and discharged through these passages 77 to 80.

The central angles of the fan-shaped first and second chambers 66 and 67 and the free piston 70, and the central angle of the concave portion 74 of the free piston 70 are appropriately set so that the operation described later can be performed. The area (pressure receiving area) of the side surfaces 70a and 70b of the free piston 70 is larger than the area (pressure receiving area) of the side surface of the vane body 71b. In addition, free piston 70
Seal plates 82 and 83 are provided on both side surfaces 70a and 70b at locations corresponding to the passages 77 and 78.

On the other hand, a rotation lever 81 is connected to the output transmission shaft 69 as schematically shown in FIG.
As the output transmission shaft 69 and the rotation lever 81 are rotated in conjunction with the shift, the shift and select lever 62 is moved in the direction indicated by arrows A and A '.
In the direction (selection direction).

The shift operation actuator 65b is a rotary fluid actuator similar to the select operation actuator 65a, and the operation rod 61 is rotated about its axis by the actuator 65b, whereby a predetermined shift operation is performed. It has become.

Next, the operation of the transmission operating device 60 having such a configuration will be described.

First, as shown in FIG.
When 62 mentions per case in the neutral position N _b, in this case, as shown in FIG. 3, the pressure chamber through passages 78 and 80 of the select operating actuator 65a from an unillustrated compressed air source Compressed air is supplied into 73,76. At this time, the pressure chambers 72 and 75 are opened to the atmosphere.
Therefore, the seal plate 82 on the side surface 70a of the free piston 70 is pressed against the side surface 66a of the second chamber 66 of the fixed housing 68, and the stopper piece 71c of the rotary vane 71 is It comes into contact with the stopper surface 74b.
As a result, the free piston 70 functions as a stopper of the rotating vanes 71, turning vanes 71 is positioned in the neutral position N _b shown in Figure 3. In response, the shift and select lever 62 is shifted as shown in FIG.
Matches b. In this state, when the shift lever is shifted to, for example, the second speed, the shift operation actuator 65b
Is driven to rotate the operation rod 61 in a predetermined direction about its axis. Along with this, the shift jaw 63b and the shift shaft 64b are operated, and the synchronizer ring and the synchronizer cone of the constantly meshing synchronous mechanism (not shown) come into contact with each other to start the synchronous operation, thereby performing the shift operation to the second speed.

Next, when the shift lever is turned from the neutral position N _b to select position N _a, along with this, compressed air is supplied to the pressure chamber 76 through the passage 80 as shown in Figure 4.
The other pressure chambers 72, 73, 75 are open to the atmosphere. Therefore, the vane body 71b of the rotary vane 71 is attached to the side surface 6 of the first chamber 67.
7a and the stopper piece 71c of the rotary vane 71
The free piston 70 is moved toward the side surface 66b of the second chamber 66 by the engagement between the and the concave portion 74 of the free piston 70. Thus, the rotation vanes 71, while being positioned at the position N _a as shown in FIG. 4, the rotary vane 71 output transmission shaft 69 in conjunction with, the rotating lever 81 and the shift-and-select lever 62 is actuated, Shift and select lever
62 is matched with shift jaw 63a.

When the shift lever is moved to the select position _Nc ,
As shown in FIG. 5, compressed air is supplied to pressure chambers 72 and 75 via passages 77 and 79, respectively, and the other pressure chambers 73 and 7 are supplied with compressed air.
6 is open to the atmosphere. As a result, free piston 70
The seal plate 83 on the side surface 70b of the rotary vane presses against the side surface 66b of the second chamber 66, and the stopper piece 71c of the rotary vane 71
Abuts the side surface 74a of the concave portion 74. As a result, rotating vanes 7
1 is positioned at the position _Nc shown in FIG. 5, and the shift and select lever 62 is matched with the shift jaw 63c. Further, when the shift lever is placed in a select position N _d, 6
As shown in the figure, compressed air is supplied to the pressure chamber 75 through the passage 79.
And the other pressure chambers 72, 73, 76 are opened to the atmosphere.
As a result, the rotation vane 71 is positioned at the position N _d shown in FIG. 6, the shift-and-select lever 62 is shifted jaw
Matched to 63d. Then, the shift lever is 3rd, 4th etc. in the inserted are each select position N _a, N _c, the shift operating actuator 65b is driven predetermined shift operation after being positioned in the N _d is made.

According to the transmission operating device 60 of the present example, the free piston 70
By utilizing the engagement action between the rotating vane 71 and
Four select position N _a, N _b, the shift-and-select lever 62 to the N _c and N _d can be accurately positioned.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

For example, the above-described select operation actuator 65a can be used as the shift operation actuator 65b. In this case, the rotating arm is attached to the operation rod 61.
What is necessary is just to mount the turning arm 68 so as to be rotatable around the axis of the operating rod 61.
In general, the shift operation force requires a greater force than the select operation force. However, if the rotary type fluid actuator 65b described above is used as the shift driving means, the shift position can be reliably determined. There is no possibility of causing trouble due to displacement or the like.

Also, housing 68, free piston 70, rotating vane
The shape and the like of 71 can be variously modified as needed.

e. Effects of the Invention As described above, the present invention provides a driving member of the speed change operation mechanism (for example, the shift and select lever 62 or the Since the operating rod 61) is configured to operate, and the positioning of the driving member is performed by using the stopper action between the free piston and the rotary vane, the advantage of the rotary type fluid actuator, that is, In addition to the advantage that the operation force can be transmitted efficiently and the size can be set without taking up a large space, the position of the select position and the shift position can be accurately and reliably determined with a simple configuration.

In particular, according to the present invention, it is sufficient to form the pressure fluid supply / discharge passage in the fixed wall defining the first and second chambers, so that the arrangement structure of the pressure fluid supply / discharge passage can be simplified. In addition, the number of seal members can be reduced, so that the number of parts can be prevented from increasing. Moreover, since the passage for supplying and discharging the pressure fluid only needs to be formed in the fixed wall, the length of the output transmission shaft in the axial direction can be suppressed short, and the size of the device can be reduced. When changing the rotation stop position of the rotary vane, the shape (specifically, the width of the concave portion) of the concave portion (stopper piece engaging portion) of the free piston is used.
There is an advantage that only a simple change is required because only the change is required.

[Brief description of the drawings]

1 to 6 show one embodiment of the present invention. FIG. 1 is a schematic front view of a transmission operating device, FIG. 2 is a sectional view of a select operation actuator, FIG. 4th
FIGS. 5, 5 and 6 are sectional views showing the operation of the actuator. 60 ... Transmission operating device, 61 ... Operation rod, 62 ... Shift and select lever, 65a ... Select operation actuator, 65b ... Shift operation actuator, 66 ... Second chamber, 67 ... 1 chamber, 68 …… Fixed housing, 68a, 68b …… Fixed wall, 69 …… Output transmission shaft, 70 …… Free piston, 71 …… Rotating vane, 71b …… Vane body, 71c …… Stopper piece, 72 , 73, 75, 76 ... pressure chamber, 74 ... recess (stopper piece engagement portion), 77, 78, 79, 80 ... passage.

Claims (3)

(57) [Claims] 1. A rotary vane integrally fixed to a rotatable output transmission shaft, a first chamber in which a vane main body of the rotary vane is rotatably arranged, and both sides of the vane main body of the rotary vane. Having a rotary fluid actuator having a pair of pressure chambers in the first chamber defined in the first chamber and a pressure fluid supply / discharge passage for selectively supplying / discharging the pressure fluid to / from the pair of pressure chambers. In the operating device, (a) a second position is provided at a location opposite to the pair of pressure chambers with respect to a rotation center of the rotary vane, and is defined by fixed walls on both sides of the pair of pressure chambers. (B) a free piston rotatably disposed in the second chamber to partition the second chamber into two pressure chambers; and (c) with respect to a rotation center of the rotary vane. At a location opposite to the vane body, and A stopper piece provided on an end face of the rotating vane facing the second chamber; and (d) a stopper piece engaging portion provided on the free piston. A transmission operating device for positioning the rotary vane and thus the output transmission shaft in the rotational direction by means of a stopper piece engaging portion of a free piston. 2. The free piston is divided into two pressure fluid supply / discharge passages for selectively supplying / discharging a pressure fluid to / from a pair of pressure chambers in the first chamber divided by the vane body. 2. The transmission operation according to claim 1, wherein the fixed wall has two pressure fluid supply / discharge passages for selectively supplying / discharging the pressure fluid to / from the two pressure chambers in the second chamber. 3. apparatus. 3. The rotary vane according to claim 2, wherein the stopper piece is provided in the second vane.
And the stopper piece engaging portion of the free piston is a concave portion, and the projecting portion is selectively brought into contact with both end surfaces of the concave portion, whereby the rotary vane and thus the output transmission shaft are provided. The transmission operating device according to claim 1, wherein positioning in the rotational direction is performed.