JPS62228738A - Discriminative feeling improving mechanism for booster for operating transmission - Google Patents

Abstract

PURPOSE:To improve a crisp feeling received from a shift lever by applying load to a casing through an input rod or an output rod when operating a shift lever. CONSTITUTION:When a spool rod 18 is slightly moved with respect to a center valve rod 17, a valve part which is formed by the supply grooves 17j, 17k of the center valve rod 17 and the supply grooves 18a-18c of the spool rod 18. Thereby, a piston rod 12 is moved leftward due to the fluid pressure in a right piston chamber 14, or the piston rod 12 is moved rightward due to the fluid pressure in a left piston chamber 15 with its moving force each time being amplified, in accordance with the movement of the spool rod 18. Accordingly, the operator can obtain a crisp feeling from the shift lever.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a booster device for transmission operation using pressure fluid as a pressure source, which corresponds to a shift position for a gear change operation when a 1-boost mechanism is activated. This invention relates to a moderation feeling improving mechanism that can give a feeling of moderation.

(Prior Art) A conventional technique is described in Japanese Utility Model Publication No. 54-13519. This device is called a detent mechanism for operating a transmission, and as shown in Figures 13 to 15, vibrations from the transmission are removed by bringing a lock ball 1 into contact with an input rod 3 via a spring 2. etc. from affecting the valve part 4 of the booster, and the recess 5 for receiving the lock ball 1 is formed in the bolt part 6 fixed to the manpower rod 3 to hold the manpower rod 3 in a neutral state. It was something that became.

(Problem to be Solved by the Invention) However, this conventional device simply applies a load to the input rod 3 in response to the phase shift between the input rod 3 and the output rod 7, regardless of the shift position of the shift lever 8. It functions to hold the input rod 3 in a neutral position with respect to the output rod 7, and no consideration has been given to improving the sense of moderation during operation in accordance with the shift position of the shift lever 8. Ta.

In other words, in the conventional booster using pressure fluid as described above, the shift force felt by the operator is as shown by the solid line a in FIG. 16, and since 1x force is effective,
The difference between the shift force in the neutral state and the shift force at the time of shifting is small, so that it is difficult for the operator to sense the neutral position.

This invention was made in order to eliminate the drawbacks of the conventional booster using pressure fluid as described above.
It is an object of the present invention to provide a mechanism that can provide a sense of moderation corresponding to the shift position during a gear change operation.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a booster for transmission operation using pressure fluid as a driving source, which is provided between a casing and an input rod or an output rod, and is provided between a casing and an input rod or an output rod. A locking mechanism that holds the input rod or the output rod in a neutral position with respect to the casing and allows the rod to slide with respect to the casing while applying a load to the rod, and a locking mechanism that is connected to the pressure system of the booster. The device is characterized in that it includes a switching mechanism that turns on and off the locking mechanism in conjunction with on and off of the pressure system.

(Function) In the above invention, when the input rod or the output rod is in the neutral position, the locking mechanism holds the rod in the neutral position, and this locking mechanism allows the human-powered rod or the output rod to be held against the casing during a shift operation. To improve the moderation feeling that an operator receives from a shift lever by applying a load when sliding.

Further, when the booster is in an off state due to the engine being stopped, the switching mechanism works in conjunction with the booster to release the locking mechanism, thereby facilitating the shift operation when the engine is stopped.

In an embodiment of the invention, the locking mechanism is.

The lock ball is biased by the elastic member and engages with the groove formed in the manual rod or the output rod, thereby holding the rod in the middle position with respect to the casing, and during a shift operation, the lock ball is pressed against the elastic member. By rolling the rod 1- while being biased, a load is applied to the rod.

In addition, in the switching mechanism, when the double booster is in the operating state, pressure is introduced into the piston chamber from the pressure system of the booster, and the piston engages with the elastic member to generate an initial load on the elastic member. When the locking mechanism is activated and the 1st force booster is not activated, no pressure is introduced into the piston chamber and the 1st elastic member is free, releasing the locking mechanism.

(Example) The present invention will be described in more detail below based on an example shown in one drawing.

FIG. 1 shows an embodiment in which a moderation feeling improving mechanism 50 according to the present invention is provided in a booster device which is itself new.
A piston rod 12 is fitted into a cylinder 11 configured by a piston cylinder IIA and a cylinder body IIB so as to be slidable in the axial direction, and an annular piston 13 is attached to the outer periphery of the piston rod 12 on the right end side in the figure. It is fitted to the rod 12 so as not to be movable in the axial direction.

And by this piston 13, the piston cylinder II
A space between the inner circumferential surface of A and the outer circumferential surface of the piston rod 12 is separated on both sides to form a right piston chamber 14 and a left piston chamber I5. Also cylinder body IIB
A cylindrical inner 16 is press-fitted between the piston rod 12 and the piston rod 12 .

A center valve rod 17 is fixed in a non-slidable and non-rotatable manner within the piston rod 12, and includes a valve cylinder 17C and collars 17A and 17B fixed to both ends of the valve cylinder 17C. A spool rod (8) is fitted so as to be slidable in the axial direction. This spool rod 18 and collars 17A, 17
A right reaction force chamber 19 and a left reaction force chamber 20 are formed at both ends of the spool rod 18, respectively. A pair of springs 21 and 22 are connected to the right reaction force chamber 1.
It is interposed between the center valve rod 17 and the spool rod 18 in the left reaction force chamber 9 and the left reaction force chamber 20, and holds the spool rod 18 at a neutral position with respect to the center valve rod 17.

An input rod 23, which is fitted into the iston rod 12 so as to be movable in the axial direction, is integrally screwed into the left end of the spool rod 18 as shown in the figure. A bolt 24 is fixed to this input rod 23 with a nut 25 perpendicular to the axial direction. Both ends of this bolt 24 are connected to the piston rod I2.
The spool rod 18 is located at the center of the port 24 opening #26 when the spool rod 18 is in the neutral state, and is located at the rear of the face of the opening 26. A predetermined clearance is maintained between each of them and the inner wall.

A moderation feeling improving mechanism 50 as shown enlarged in FIGS. 2 and 3 is provided further to the left end of the piston rod 12 than the opening 26 of the piston rod 12 in the drawing.

This moderation feeling improvement mechanism 50 has a lock ball groove 51 formed on the outer circumference of the piston rod 12, and a housing 52 integrally formed with the cylinder 11 so as to face the position of the lock ball groove 51 in the neutral state. A lock ball hole 53 is formed. Furthermore, a cylinder hole 54 is formed in the upper part of this lock ball hole 53,
The piston 55 is fitted into the near moving position.

The upper end of the piston hole 53 is sealed by a plug 56 to form a piston chamber 57, which is communicated with a pressure fluid inlet 11a formed in the cylinder 11 through a communication hole 58.

The lock ball 59 is located in the lock ball hole 53 at t, rr.
- It is biased in the direction of engagement with the lock ball groove 51 of the piston rod 12 by a spring BO interposed between the piston 55 and the piston 55. When the spool rod 18 and the piston rod 12 are in the neutral position, the lock ball 59 engages with the lock ball groove 5 and engages the piston rod 12.

Next, the structure of the pressure system of the booster will be explained based on FIGS. 4 to 6. FIG. 6 is a diagram schematically showing the flow path of pressure fluid, and FIG. 5 shows a cross section taken along line B, and FIG. 5 shows a cross section taken along line AC in FIG.

In the drawing, the cylinder body LIB has a pressure fluid inlet 1.
1a (FIG. 5) and a pressure fluid outlet 11b (FIG. 4) are formed, and in inch 16.

Three communication grooves lea and IBb extend in the axial direction, the arrangement of which is shown in FIG. 6, on the inner circumference.

16c is formed, the communication groove Lea communicates with the pressure fluid inlet 11a, and the communication groove IGb communicates with the pressure fluid outlet 11b. In addition, the piston rod 12 has three through holes 12a, 12b, and 12c formed at positions facing each of the communication grooves 1(ia, 1(ib, 10c) of the inner 16, and the communication grooves lea, 18b, and L, respectively.
It is connected to 6c.

The piston rod 1 is located on the outer periphery of the center valve rod 17.
A communication groove 17b (Fig. 4) extending in the axial direction is formed at a position facing the second through hole 12b and communicates with the second through hole 12b. The communication groove 17b is opened in the inner circumferential surface of the puller valve rod 17 at both ends thereof by a pair of through holes 17d and 17e. Furthermore, a communication groove 17a (FIG. 5) having a predetermined width in the axial direction is formed in the outer circumference of the center valve rod 17 at a position facing the through hole 12a of the piston rod I2, and communicates with the through hole 12a. ing. Furthermore, a through hole 17g is formed in the center valve rod 17 at a position facing the through hole 12c of the piston rod 12 and communicates with the through hole 12c. Furthermore, there is one through hole 17g on the outer periphery of the center valve rod 17.
A communication groove +7h extending in the axial direction is formed on the outer circumference at a position on the left side in the drawing, and is communicated with the left reaction force chamber 20 through a two-hole 17i.

The center valve rod 17 has one through hole 17d and one through hole on the inner circumference.
7e and two annular supply grooves +yj,
1. The supply groove 17j on the right side in the figure is communicated with the through hole 17g, and the supply groove 17 on the left side in the figure 2 is communicated with the communication groove +7h through the through hole 17J2.

On the outer circumference of the spool rod 18, three supply grooves 17j and 17 of the center valve rod 17 are arranged alternately.
Annular supply grooves 18a, 18b, and 18c are formed, and the supply groove L8a on the right side in the figure communicates with the through hole 17d, and the supply groove 18c on the left side in the figure communicates with the through hole 17e, respectively (FIG. 4). In addition, the supply groove 18b in the center of the illustration is the through hole 1.
7f communicates with the communication groove 17a of the center valve rod 17 (FIG. 5). A communication hole 18d extending along the axis is formed in the center of the spool rod 18, and the left end side in the drawing communicates with the supply m 17 k of the center valve rod 17 through a communication hole 18e.

The piston 13 is located on the right end side of the piston rod 12 in the figure.
Through holes 12d and 12e, which communicate with the right piston chamber 14 or the left piston chamber 15, respectively, are formed so as to be located on both sides of the piston chamber. And the through hole 12d or 12e of the piston rod 12 on the outer periphery of the center valve rod 17, respectively.
Two annular supply lines 7m17m, 17
n is formed and communicates with the through hole 12d or +28, respectively. In addition, the supply groove 12e on the left side of the figure is the through hole 17.
o communicates with the right reaction force chamber 19.

An annular supply groove 17p is formed in the inner peripheral part of the center valve rod 17 at a position opposite to the supply groove 17m on the right side in the figure, and is communicated with the supply groove 17m on the outer peripheral part through a single through hole 17q. A through hole 18f formed in the rod 18 communicates with the communicating hole lad.

Note that the communication groove 113c located on the lower side in the drawing of the inner IB is always communicated with the left piston chamber 15.

As shown in FIG. 7, the booster 40 is attached to a transmission 41, and the input rod 23 is connected to the shift link 4.
2 to the shift lever 43, and a pressure fluid port 11a is connected to the shift lever 43 via a pipe 44.
A pressure fluid outlet ub is connected to the pressure fluid pump 4B via a vibrator 45.

First, the operation of the booster will be explained with reference to FIGS. 8 to 11. Here, FIGS. 9 and 11 are diagrams each schematically showing the connection state of the name tag or groove in the operating position of the spool rod 18.

When the shift lever 43 is in the neutral state, the spool rod 18 and the input rod 23 are held in the neutral position as shown in FIGS. 4 to 6. In this neutral state, as can be seen from FIGS. 5 and 6, the pressure fluid introduced from the pressure fluid port 11a flows through the communication groove tea, through hole 12a, communication groove 17a, through hole 17f, supply groove 18b, and
Supply groove 17j - through hole 17g - through hole 12c - communication groove 16c
It is introduced into the left piston chamber 15 through the path of the supply groove +8b and the supply groove 171 (- through hole 18e and the communication hole 18).
d-Through hole L8f-Supply? R17T) - through hole 17Q - supply groove 17m - right piston chamber 14 through the path of through hole 12d
will be introduced in

Also, the pressure fluid introduced into the left piston chamber 15 is as follows.

It is introduced into the right reaction force chamber 19 through the through hole 12e, the supply groove 17n, and the through hole 17o, and is also introduced into the left reaction force chamber 20 through the supply groove 17k through the through hole 17 (the connecting groove 17h and the through hole 17i). be done.

Therefore, the spool rod 18 is maintained at the neutral position by the balance of the internal pressures of the right reaction force chamber 19 and the left reaction force chamber 20, and by the reaction springs 21 and 22.・ .

As can be seen from FIGS. 4 and 6, in this neutral state, the excess pressure fluid introduced into the supply groove 18b is routed through the supply groove 17j-supply groove 18a-through hole 17d or into the supply groove 17. The fluid flows out into the communication groove 17b via the path of supply groove 18c and through hole 17e, passes through communication groove L7b, through hole 12b and communication groove 18b, and is discharged from pressure fluid outlet 11b.

In this neutral state, the bolt 24 is located at the center of the opening 2B, and a predetermined clearance is maintained in the left-right direction in the drawing.

Next, by operating the shift lever 43, the spool rod 1 is
8 is slid toward the left in the figure with respect to the center valve rod 17, as shown in FIGS. 8 and 9, the supply groove tab and the supply groove 17j is cut off, and the pressure fluid flows into the right piston chamber 14 and the left reaction force chamber 2.
0 through the same route as above.

Therefore, due to the hydraulic pressure in the right piston chamber 14, the piston 13
is urged to the left in the figure, and the piston rod 12 is slid to the left in the figure with respect to the cylinder 11. At this time, as the piston 13 moves, the fluid in the left piston chamber 15 flows through the communication groove L [ic - through hole 12c - through hole 17g - supply groove 1
7j - Supply groove 18a - Through hole 17d - Communication groove 17b - Through hole 12b - Pressure fluid discharge port 1 through the path of communication groove tab
It is discharged from 1b.

Also, by operating the shift lever 43, the spool rod 1
8 is slid toward the right in the drawing relative to the center valve rod 17, as shown in FIGS. Groove 18b and supply groove 1
7 is cut off, and the pressure fluid is transferred to the left piston chamber 15.
and is introduced only into the right reaction force chamber lO through the same route as above.

Therefore, due to the fluid pressure in the left piston chamber 15, the piston 1
3 is urged in the right direction in the drawing, and the piston rod 12 is slid in the right direction in the drawing with respect to the cylinder 11. At this time, the right screw! - The fluid in the chamber 14 flows as the piston 13 moves, from the through hole 12d, through the supply groove 17m, through the through hole 17Q, through the supply groove 17p, through the through hole 18f, through the communication hole 18d, through hole 18e, through the supply groove 17, through the supply groove 18c - Through hole 17e - Interlocking groove 17b -
The pressure fluid is discharged from the pressure fluid discharge port 11b through a path between the through hole 12b and the communication groove +6b.

As described above, when the spool rod 18 is slightly moved relative to the center valve rod 17, the supply grooves 17j, 17 of the center valve rod 17 and the spool rod 1
By switching the valve section constituted by the supply grooves 18a, 18b, and 18c of the
When the spool rod 18 moves to the left in the drawing, the fluid pressure in the right piston chamber 14 causes the piston rod 12 to move to the left in the drawing, and when the spool rod 18 moves to the right in the drawing, the fluid pressure in the left piston chamber 15 moves the piston. The rods 12 are moved to the right in the figure, with their respective moving forces being amplified.

In the operating state of the booster as described above, as shown in FIG. The piston 55 is pushed downward in the drawing by the internal pressure generated inside.

It is locked in a stepped portion 61 between the piston hole 54 and the lock ball hole 53. In this state, the spring 60 generates an initial load and presses the lock ball 59 toward the piston rod 12 side.

As described above in the booster, when the piston rod 12 is in the neutral state, the lock ball 59 is engaged with the lock ball groove 51, and the spool rod 1
When the piston rod 12 slides with respect to the casing 52 due to switching of the valve portion with the operation of 8, the lock ball 59 is pulled out from the lock ball groove 51 and transferred on the outer peripheral surface of the piston rod 12. In this way, during the shift operation, the lock ball 59 moves into the lock ball groove 51.
The resistance force generated depending on the shape of the groove 51 when the piston rod 12 is pulled out, and the load generated by the spring 80 when the lock ball 59 rolls on the piston rod 12 are the load when the piston rod 12 slides. This acts from the piston rod 12 to the reaction force chamber 19 or 20.
As a result, the operator can obtain a sense of moderation from the shift lever 43 as shown by the chain line in FIG.

When the round engine is off, that is, when the pressure system of the booster is inactive, the piston chamber 5
7, no fluid pressure is introduced, so the piston 55 is in a free state and the spring 60 does not function. Therefore, the piston rod 12 receives no load from the lock ball 59, making it possible to shift with a small force when the engine is stopped.

In the above-mentioned booster, the reaction at the time of gear change is the pressure fluid introduced from the piston rod 12 and the center valve rod 17 into the left reaction force chamber 20 when the spool rod 18 moves to the left in the figure. When the spool rod 18 moves to the right in the figure, the reaction force is transmitted to the spool rod 18 via the pressure fluid introduced into the right reaction force chamber 19, and the operator can change gears in the transmission using the shift lever 43. This allows you to get a feel for what it feels like.

In addition, when the fluid pressure system fails or the engine is stopped, the bolt 24 will close to the opening 26 in any direction.
The input rod 23 is slid relative to the piston rod 12 until the bolt 24 engages with the end of the piston rod 12, and after the bolt 24 engages with the piston rod 12, the input rod 23 and the piston rod 12 are slid together,
Shift operations are possible.

Figure 12 shows a lock ball groove 51 in the input rod 23.
This is to show another embodiment of the present invention in which - is formed.

Furthermore, as another embodiment, the lock ball grooves may be formed not only at the neutral position of the piston rod 12 or the input rod 23 but also at the completion position of the speed change operation. This allows the operator to easily sense the completion of the shift operation.

(Effects of the Invention) As described above, in this invention, the lock mechanism holds the inlet rod or the output rod at a neutral position with respect to the casing, and when the input rod or the output rod slides during a shift operation, By applying a load to the rod, it is possible to give a sense of moderation to the shift operation and improve the shift feeling.

Furthermore, since the switching mechanism turns the locking mechanism on and off in conjunction with turning on and off the engine, the locking mechanism is released when the engine is stopped, facilitating shift operations when the engine is stopped.

As a method of holding the input rod or the output rod in a neutral position with respect to the casing, it has been considered to attach a spring 60 to the casing to bias the lock ball 59, as shown in Fig. 17. In this mechanism, even when the engine is stopped and the booster is inactive, a load is applied to the rod by the lock ball 59'', making the shift operation very heavy when the engine is stopped.

In contrast, in the present invention, as described above, the locking mechanism is released by the switching mechanism when the engine is stopped, so there is no such concern at all.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the same embodiment in an operating state. FIG. 3 is a partially enlarged view of FIG. 2 in an inoperative state. FIG. 4 is a cross-sectional view showing the booster in the same embodiment at the pressure fluid outlet position, FIG. 5 is a cross-sectional view showing the same embodiment at the pressure fluid inlet position, and FIG.
The figure is a schematic diagram showing the pressure fluid flow path in the neutral state of the same embodiment, Figure 7 is a layout diagram showing the mounting state of the booster, and Figure 8 is an M4 spool rod moving in one direction. FIG. 9 is a schematic diagram showing the flow path of pressure fluid in the state of FIG. 8, and FIG.
The figure is a sectional view showing the state when the spool rod moves in the other direction, FIG. 11 is a schematic diagram showing the flow path of pressure fluid in the state of FIG. 10, and FIG. 12 is another embodiment of the present invention. 13 to 15 are cross-sectional views showing the conventional example, FIG. 16 is a graph comparing the shift forces of the present invention and the conventional example, and FIG. 17 is a diagram showing another conventional example. be. 11... Cylinder, 11a... Pressure fluid population. 11b...Pressure fluid discharge 0.12...Spool rod. 13...Piston, 14...Right piston chamber. 15...Left piston chamber. 17... Center valve rod. 17j, 171c...supply groove, 18...spool rod. 18a, 18b, 18c--supply groove. 19...Right reaction force chamber, 20...Left reaction force chamber. 24... Bolt, 26... Opening. 27... Striker, 50... Moderation feeling improvement mechanism. 51... Lock ball groove, 52... Casing. 55... Piston, 57... Piston chamber. 58...Communication hole, 59...Rock ball. 60...Spring. Applicant: Aisin Seiki Co., Ltd. Agent: Patent Attorney Michi Kato (1 other person) Figure 6j [Figure 7]

Claims (3)

[Claims] (1) In a transmission operation booster that uses pressure fluid as a drive source, it is provided between a casing and an input rod or an output rod, and holds the input rod or output rod in a neutral position with respect to the casing, and the rod a locking mechanism that allows the rod to slide relative to the casing while applying a load to the booster; and a locking mechanism that is connected to the pressure system of the booster and turns on and off in conjunction with the on and off of the pressure system. A mechanism for improving moderation sensation of a booster for operating a transmission, characterized by comprising a switching mechanism. (2) The locking mechanism is composed of a groove formed on the outer periphery of the input rod or the output rod, and a lock ball that is removably engaged with the groove by being biased by an elastic member. A moderation feeling improving mechanism for a booster for operating a transmission according to claim 1. (3) A patent in which the switching mechanism is composed of a piston chamber connected to the pressure system of the booster, and a piston that operates to bias an elastic member toward the input rod or output rod side by the pressure inside the piston chamber. Claim 1
and a moderation feeling improving device for a booster for operating a transmission according to item 2.