JP2554211Y2 - Transmission operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Industrial Field of the Invention The present invention relates to a transmission operating device mainly provided in a transmission of a large vehicle.

b. Conventional technology In a transmission operating device used for a large vehicle or the like, a positioning mechanism in a select direction tends to be multi-stage. According to this tendency, recently, in the select direction, 4
Various transmission operating devices capable of switching positions have been proposed.

c. Problems to be solved by the invention Usually, automobiles are provided with transmissions having different specifications depending on the type of the vehicle. Therefore, there is a demand for the development of a versatile transmission operating device that can easily change the number of select positions appropriately for transmissions having different specifications.

The present invention has been made in view of such circumstances, and its purpose is to increase the number of select positions only by adding a simple configuration, and to increase or decrease the number of select positions (3 positions). (From 4 to 3 or from 4 to 3) can be appropriately performed by a simple operation, and a further object of the present invention is to provide a transmission operating device having versatility.

d. Means for Solving the Problems In order to achieve the above object, in the present invention, the operating rod is slid in the axial direction by fluid pressure, and the shift and select lever integrally attached to the operating rod is provided. A transmission operating device for performing a select operation by operating a sub-housing having a bottomed cylindrical shape at both ends of a main housing that supports the operating rod so as to be switchable between two positions N ₁ and N _4. In addition to being detachably mounted, a free piston is slidably disposed in these sub-housings, and the free piston disposed at the forward movement position is used as a stopper for the operating rod, thereby enabling the switching position of the operating rod. Is added to the two positions N ₁ and N ₄ by the main housing, and two more positions N ₂ and N ₃ are added to make a total of four positions N ₁ , N ₂ , N ₃ , and N ₄ , the sub-housing on either side of the both ends of the main housing, and the free piston disposed in the sub-housing, Remove the main housing, attach a stopper plate to the end of the main housing on the side from which the main housing is removed, close the opening at the end of the main housing with the stopper plate, and attach the stopper plate to the inner end face and the inner end face. By appropriately setting the relative positional relationship between the opposing end surface of the operation rod, the position where the end surface of the operation rod abuts on the inner end surface of the stopper plate is set as the end position, and accordingly, The switching position of the operating rod is determined by four positions N ₁ , N ₂ , N ₃ , N ₄
To three positions N ₁ , N ₂ , N ₃ or N ₂ , N ₃ , N ₄ .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment of the transmission operating device according to the present invention.
This is for describing an example. As shown in FIG. 2, this device comprises a shift and select mechanism 10 mounted on the upper surface of a transmission 1 and a direction perpendicular to the longitudinal direction of the mechanism. And a shift mechanism unit 30 disposed on the side of the shift mechanism. These mechanisms 10 and 30 are arranged below the bed 7 of the truck 6. In FIG. 2, reference numeral 8 denotes an engine, and 9 denotes a clutch.

FIG. 1 mainly shows the shift and select mechanism unit 10. The housing 11 of the mechanism 10 is
It is composed of three parts 11a, 11b, 11c, 11d. That is, the housing 11 having a cylinder inside has a bottomed cylindrical shape which is detachably attached to one end side of the main housing 11a, 11b which constitutes the main body of the mechanism section 10 and one end of the main housing 11b by bolting or the like. Sub housing 11c
And a sub-housing 11d detachably attached to one end of the main housing 11a by bolting or the like. Therefore, the sub housings 11c and 11d are detachably attached to both ends of the main housings 11a and 11b.

The main housing 11a supports the shift and select operation rod 12 slidably and rotatably in the axial direction thereof, and the operation rod 12 includes a shift and select lever 13 at an intermediate portion thereof. . This lever 13
Is fixed to the operating rod 12 by a bolt 14 or the like, and the free end 13a of the lever 13 is connected to four shift forks 2, 3, 4, 5
Can be selectively engaged with the notches 2a, 3a, 4a, 5a. The operating rod 12 has a fixed piston 15 at one end.
And an outer lever 16 for linking with the shift mechanism 30 at the other end. The fixed piston 15 is positioned on the operation rod 12 by a snap ring or the like, and the outer lever 16 is fixed to the operation rod 12 by a pin or the like.

The fixed piston 15 is connected to the main housing 11b.
Slidably accommodated in the cylinder 11b, and the interior of the cylinder 11b is defined by two pressure chambers 17, 18. The pressure chambers 17, 18 and the fixed piston 15 constitute a select actuator A.

The both ends 12a and 12b of the operation rod 12 are arranged so as to protrude outward from the main housings 11a and 11b and move in the sub-housings 11c and 11d. Free pistons 19 and 20 are slidably mounted in these sub-housings 11c and 11d, respectively. Each free piston 19, 20 is the end face 12c, 1 of the operating rod 12.
The surfaces facing 2d are defined as stopper surfaces 19a and 20a, and the opposite surfaces define pressure chambers 21 and 22 in the cylinders of sub-housings 11c and 11d, respectively.

Shift-and-select mechanism 10 configured as above
The pressure chambers 17 and 18 are connected to the air tank 53 via electromagnetic switching valves 51 and 52, respectively, and the pressure chambers 21 and 22 are connected to the air tank 53 via one electromagnetic switching valve 54.

In FIG. 1, reference numerals 2b, 3b, 4b, and 5b denote fork shafts of the shift forks 2, 3, 4, and 5, respectively.

The state shown in FIG. 1 of the shift-and-select mechanism 10 is a state in which the switching valves 51 and 54 are opened and the switching valve 52 is closed. Therefore, in this state, compressed air is supplied to the pressure chambers 17, 21, and 22, and the pressure chamber 18 is open to the atmosphere. Therefore, the fixed piston 15 is urged rightward in FIG. 1, and urges the operating rod 12 rightward. On the other hand, the free piston 19 is urged leftward and pressed against the partition 11e of the main housing 11b. Also,
The free piston 20 is biased to the right and the sub housing 11
It is pressed against the partition wall 11f of d. Therefore, the operating rod
12, the end face 12c is the stopper face 19a of the free piston 19
And is positioned there. In this case, this state in which the shift and select lever 13 is engaged with the notch 3a of the shift fork 3 is defined as a neutral position N ₂ of the second position (see FIGS. 1 and 3).

Under this state, as shown in FIG. 1, the interval between the cylinder bottom wall 11h of the free piston 19 and the auxiliary housing 11c is made as L _1, the free piston 20 and the auxiliary housing 11d
It made and L ₃ of the bottom wall 11g of the spacing between the free piston 20 and the operating rod 12 is made with L _2. On the other hand, the distance between the fixed piston 15 and the partition 11e of the main housing 11b is L ₄
It made and the distance between the partition wall 11i of the fixed piston 15 and the main housing 10a is made with L _5. Incidentally, greater than the distance L ₄ represents distance L _1, the distance L ₅ is configured larger than the distance (L ₂ + L _3).

Thus, in the case of this example, as shown in FIG. 6, when the fixed piston 15 is in contact with the partition 11e of the main housing 11b, the free piston 19 is
It is set to be in a free state between 12c and the bottom wall 11h of the sub-housing 11c. On the other hand, although not shown, the fixed piston 15 is attached to the partition wall 1 of the main housing 11a.
Under the state of contact with 1i, the free piston 20 is set to be in a free state between the end surface 12d of the operation rod 12 and the bottom wall 11g of the sub-housing 11d. Thus, in this example, the main body 10 of the shift and select
The operation rod 12 can be switched to two positions by a (cylinder partition walls 11e, 11i serve as stoppers for the fixed piston 15), and a pair of free pistons 19, 20 provided at both ends are used for two more positions. (The free pistons 19 and 20 disposed at the forward movement position serve as stoppers for the operation rod 12), and a total of four positions can be switched.

Next, the specific operation of the transmission operating device of the present embodiment will be described below.

First, from the state shown in FIG. 1 (a neutral position N ₂ of the second position), the shift fork 4 of the lever 13
To engage the notch 4a (a neutral position N ₃ of the third position), opens the switching valve 52 maintains the switching valve 54 in the open state, and if the closing switching valve 51 Good. Then, the fixed piston 15 is urged leftward in FIG. 1 to urge the operation rod 12 leftward.
Moves leftward, and its end surface 12d abuts against the stopper surface 20a of the free piston 20 at the forward movement position, and is positioned there. This position is the third position neutral position N ₃
It is.

Furthermore, engaging the lever 13 to the notch 5a of the shift fork 5 (a fourth neutral position N ₄ positions)
In this case, the switching valve 52 may be maintained in the open state, and the switching valves 51 and 54 may be closed. Then, since the pressure chamber 22 is opened to the atmosphere, the operating rod 12 moves leftward together with the free piston 20 by the pressure of the pressure chamber 18 acting on the fixed piston 15. The leftward movement of the operation rod 12 is stopped by the free piston 20 abutting on the cylinder partition 11g of the sub-housing 11d. This position is the neutral position N ₄ of the fourth position.

Further, from this state, the lever 13 is engaged with the notch 3a of the shift fork 2 (the neutral position of the second position).
The N ₂ to), by opening the switching valve 51 and 54 may be closed switching valve 52. Then, the pressure chamber 18 is opened to the atmosphere,
Since compressed air is supplied to the pressure chambers 17 and 21, the operating rod 12 is urged rightward in FIG. 1 by the pressure of the pressure chamber 18 acting on the fixed piston 15. This allows the operating rod 12
Moves rightward, and its end face 12c abuts against the stopper face 19a of the free piston 19 at the forward movement position, and is positioned there. This position is the second position neutral position N ₂
It is.

In this state, the lever 13 is engaged with the notch 2a of the shift fork 2 (the neutral position of the first position).
To the N _1), while maintaining the switching valve 51 in the open state, switches valve 54 to the closed state, and may be closed and the switching valve 52. Then, the pressure chambers 18 and 21 are opened to the atmosphere, and the pressure chambers 17 and 21 are opened.
The fixed piston 15 is urged rightward in FIG. 1 and the operating rod 12 is moved rightward with the free piston 19. Then, the rightward movement of the operation rod 12 is stopped when the free piston 19 abuts against the partition wall 11h of the sub-housing 11c. This position is the neutral position N ₁ of the first position.

Then, as described above, the operation rod 12 is in the neutral position.
When selectively switched to any one of positions N _{1 to} N ₄ ,
The shift mechanism 30 operates. This allows the operating rod
12 is rotated about its axis, and a predetermined shift operation is performed.

As described above, according to the transmission operating device of the present embodiment, the pair of free pistons 19 and 20 attached to both ends of the shift and select mechanism unit 10 are used as positioning stoppers of the operating rod 12, it is possible to switch the selecting direction of the neutral position (select position) to the third 4-position N ₁ shown in _{FIG., N 2, N 3, N} 4.

To reduce the number of select positions from four to three, the sub-housing 11c,
One of 11d may be removed from the main housings 11a and 11b, the free piston in the sub-housing may be removed, and the stopper plate may be fixed so as to close the opening on the end surface of the removed main housing. For example, when removing the left sub-housing 11d and the free piston 20, as shown in FIG. 4, a stopper plate 23 is fixed to the end of the main housing 11a, and the operating rod 12 is moved to the position shown in FIG. when in it may be the distance between the inner end surface 23a of the stopper plate 23 and the end face 12d of the operating rod 12 that faces the inner end surface 23a to set to L _2. In this case, a number of select position is reduced from four positions _{(N 1, N 2, N} 3, N 4) to 3-position _{(N 1, N 2, N} 3). Although not shown, the right sub-housing 11
c and free piston 19, remove main housing 11a
Attaching the stopper plate to the right end of (the interval L ₁ set) can be made to the them if the number of select position 3 position _{(N 2, N 3, N} 4). For this reason, the number of select positions can be easily reduced. In addition, since the configuration of the main body of the main housing 11a, 11b does not need to be changed at all, the main body can be shared for each number of select positions, which is advantageous in terms of cost.

FIGS. 5 and 6 show a second embodiment of the present invention.
The main body 10a is configured to switch the operating rod 12 to two positions, and a pair of free pistons 19 and 20 disposed at both ends of the main body 10a can further switch between two positions. Switching is possible.

That is, in the case of this example, as shown in FIG. 6, under the state where the fixed piston 15 is in contact with the partition wall 11e of the main housing 11b, the free piston 19 is moved to the end surface 12 of the operating rod 12.
It is set to be in a free state between c and the bottom wall 11h of the sub-housing 11c. On the other hand, although not shown, when the fixed piston 15 is in contact with the partition 11i of the main housing 11a, the free piston 20 is
It is set to be in a free state between the end surface 12d of the sub-housing 12 and the bottom wall 11g of the sub-housing 11d. The other configuration is the same as that of the above-described embodiment.

Therefore, when the pressure chamber 21 of the sub-housing 11c is open to the atmosphere, compressed air is supplied into the pressure chamber 17 of the main housing 11b, and when the operating rod 12 moves rightward with this, the fixed piston 15 As shown in FIG. 6, the main housing 11b is held in contact with the partition wall 11e of the main housing 11b. At this time, the free piston 19 is placed under the free state. As a result, the shift and select lever 13
There engages the notch 2a of the shift fork 2 is switched to the neutral position N ₁ of the first position. Under this condition, when compressed air is supplied to both the pressure chambers 17 and 21,
Since the stopper surface 19a of the free piston 19 abuts on the end surface 12c of the operating rod 12 and presses the same to the left, the fixed piston 15 separates from the partition wall 11e. As the free piston 19 comes into contact with the partition wall 11e as shown in FIG. 5, the shift and select lever 13 engages with the notch 3a of the shift fork ₂ to switch to the neutral position N2 of the second position. Can be

Although not shown, when compressed air is supplied to both the pressure chamber 18 and the pressure chamber 22, the free piston 20 comes into contact with the partition 11f (see FIG. 1) of the sub-housing 11d and the free piston The end surface 12d of the operating rod 12 abuts on the stopper surface 20a of the 20 and is held at that position. Accordingly, the shift-and-select lever 13 engages with the notch 4a of the shift fork 2 is switched to the neutral position N ₃ of the third position. Under this condition, when the pressure chamber 22 is opened to the atmosphere, the operating rod 12 is further moved leftward together with the free piston 20, and the fixed piston 15 is brought into contact with the partition 11i of the main housing 11a and is moved to that position. Will be retained.
In this case, the free piston 20 is placed under the free state. As a result, the shift and select lever 13
There engages the notch 5a of the shift fork 5 is switched to the neutral position N ₄ of the fourth position.

Thus, also in this example, the free pistons 19, 20
, The operating rod 12 can be switched to four positions. Further, the same operation and effect as those of the above-described embodiment can be obtained.

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 fixed piston 15 may be formed integrally with the operation rod 12, and the shapes of the free pistons 19 and 20 can be changed as necessary.

e. Effects of the Invention As described above, in the present invention, the sub-housings are detachably mounted on both ends of the main housing which slidably supports the operating rod, and the free pistons are disposed inside the sub-housings. The operation rod can be positioned at four positions (switching between four positions) by utilizing the sub-housing on either side of both ends of the main housing and the sub-housing. The free piston provided is removed from the main housing, and a stopper plate is attached to an end of the main housing on the side from which the free piston has been removed. The relative positional relationship between the end face and the end face of the operation rod facing this inner end face is appropriately set. The Rukoto, wherein the position where the end surface of the operating rod is in contact with the inner end surface of the stopper plate and end position, in response to this, switching position a total of 4 positions N ₁ of said operating rod, N _2, N _3, 3 positions N ₁ from N ₄ ,
It is configured such that it can be changed to N ₂ , N ₃ or N ₂ , N ₃ , N ₄ .

Therefore, according to the present invention, the number of select positions is increased (specifically, the number of select positions is increased from three to four) by adopting a simple configuration in which the sub housing and the free piston are attached to both ends of the main housing. ) Can be easily achieved. Therefore, according to the transmission operating device of the present invention, the number of select positions can be appropriately changed to four (four positions) or three (three positions) corresponding to transmissions having different specifications. Thus, a versatile and practical transmission operating device can be provided. In addition, the apparatus main body (main housing portion) on which the sub-housing and the free piston are mounted can be commonly used for switching between three positions and switching between four positions, which is advantageous in terms of cost.

In addition, since the sub-housing and the free piston are arranged at both ends of the main housing, either one of the two ends, the sub-housing and the free piston, can be replaced with the simpler one or the select end. It is possible to appropriately select and attach / detach depending on the position.

By the way, conventionally, there are cases where the select position of the transmission is different from three positions and four positions due to the difference in the gear position. Therefore, conventionally, it was necessary to use a dedicated transmission operating device, but according to the present invention, it is possible to easily respond to the increase or decrease in the number of select positions with a simple arrangement, and excellent versatility due to the common use of the device. A great effect can be obtained in terms of cost.

[Brief description of the drawings]

1 to 3 are views for explaining a first embodiment of the present invention. FIG. 1 is a sectional view of a shift and select mechanism of a transmission operating device, and FIG. FIG. 3 is a schematic side view of a truck showing an arrangement position of the device, FIG. 3 is a diagram showing a shift pattern at a shift switching position, FIG. 4 is a cross-sectional view showing a modification in which a stopper plate is attached to an end of a main housing; FIG. 5 and FIG. 6 are explanatory views of a second embodiment of the present invention, and are enlarged cross-sectional views of a main part of a shift and select mechanism portion showing operation states of a transmission operating device. 1 ... transmission, 10 ... shift and select mechanism, 11
…… Housing, 11a, 11b …… Main housing, 11c, 1
1d… Sub housing, 11g, 11h… End wall 12… Operation rod for shift and select, 12c, 12d…
... end face, 15 ... fixed piston, 17, 18, 21, 22 ... pressure chamber, 19, 20 ... free piston, 19a, 20a ... stopper face, 23 ... stopper plate, 23a ... inner end face, 30 … Shift mechanism.

Claims (1)

(57) [Scope of request for utility model registration] 1. A transmission operating device wherein an operating rod is slid in an axial direction by fluid pressure and a shift operation and a selecting lever integrally mounted on the operating rod are operated to perform a select operation. A bottomed cylindrical sub-housing is removably attached to both ends of a main housing which supports the operation rod so as to be switchable between two positions N ₁ and N ₄ , and a free piston slides in these sub-housings. By freely arranging and using the free piston arranged at the forward movement position as a stopper of the operation rod, the switching position of the operation rod is added to the two positions N ₁ and N ₄ by the main housing and two more. while configured to be able to set the position N _2, by adding N ₃ four-position _{N 1, N 2, N 3} , N 4, the main The sub-housing on either one of the two ends of the housing and the free piston disposed in the sub-housing are removed from the main housing, and a stopper plate is attached to an end of the main housing on the removed side. A lever plate closes an opening at an end of the main housing, and a relative positional relationship between an inner end surface of the stopper plate and an end surface of the operation rod facing the inner end surface is appropriately set. Thus, the position where the end surface of the operating rod abuts on the inner end surface of the stopper plate is defined as the end position, and accordingly, the switching position of the operating rod is set to four positions N ₁ , N ₂ , N ₃ , N _Four
A transmission operating device characterized in that it can be changed to three positions N ₁ , N ₂ , N ₃ or N ₂ , N ₃ , N ₄ .