JPH058123U - Transmission operating device - Google Patents

Abstract

(57) [Summary] [Purpose] After the change lever reaches the shift complete position, the power shift booster will not operate even if the change lever is operated excessively any more, which may result in unnecessary energy consumption and excessive energy consumption. It is possible to prevent deterioration of durability of the constituent members due to load. [Structure] When the change lever 1 reaches the shift completion positions A and B, the switches 23A and 23B are actuated, whereby the solenoid valve 22 is switched to the inoperative position, and the negative pressure port 10 of the power shift booster 4 and The atmospheric pressure port 11 is communicated, and the power shift booster 4 becomes inoperative.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transmission operating device using a power shift booster.

[0002]

[Prior Art]

 A conventional device of this type is shown in FIG. 3, for example.

Reference numeral 1 denotes a change lever for a manual transmission, which is rotated in the front-rear direction from an intermediate neutral position N to a shift completion position A in the front (the left side in FIG. 3 is the front) and a shift completion position B in the rear. In addition to being movable, it is also mounted on the vehicle body (not shown) so that it can also be moved (selected) in the left-right direction. As is well known, the gear ratio of the transmission 2 can be switched to, for example, five forward gears and one reverse gear by a combination of forward and backward and leftward and rightward movements of the change lever 1. However, here, the movement of the change lever 1 in the left-right direction (selection direction) is not directly related to the present invention, and therefore the explanation of the operation in that direction and illustration of the configuration related thereto are omitted, and the forward-rearward direction (shift direction). ) Will be described only.

A power shift booster 4 is provided in the middle of a link mechanism 3 between the change lever 1 and the shift lever 2a of the transmission 2 so that the change lever 1 can be operated with a light force.

The power shift booster (hereinafter simply referred to as “booster”) 4 is publicly known, and its internal structure itself is not directly related to the present invention. Therefore, a brief description will be given only to its rough structure and operation. The booster 4 includes a case 5 fixed to a vehicle body (not shown), an input shaft 6 fitted to one end of the case 5 so as to move forward and backward, and an output shaft fitted to the other end of the case 5 so as to move forward and backward. 7, a negative pressure port 10 provided at one end of the case 5 and connected to the negative pressure source 8 through a pipe 9, and provided at the other end of the case 5 and opened to atmospheric pressure. An atmospheric pressure port 11, a cylinder 12 provided in the middle of the case 5, a piston 13 slidably fitted in the cylinder 12 in the front-rear direction, and linked with the input shaft 6 and the output shaft 7. , Provided inside the piston 13, It is provided with front and rear valves 14 and 15 which can be opened and closed by a slight differential between the shaft 6 and the output shaft 7.

The change lever 1 is linked to the input shaft 6 through the lever 16, which is a part of the linkage mechanism 3, the connecting rod 17, the lever 18 bent in a dogleg shape, and the connecting rod 19 in order, and the output shaft 7 Is linked to the shift lever 2 a of the transmission 2 via the connecting rod 20.

When the booster 4 is inactive, both the front cylinder chamber 12A and the rear cylinder chamber 12B in the cylinder 12 that sandwich the piston 13 are maintained at a negative pressure lower than atmospheric pressure.

From this state, when the change lever 1 is rotated from the neutral position N toward, for example, the rearward shift completion position B, the lever 16, the connecting rod 17, the lever 18, and the connecting rod 19 are sequentially passed. When the input shaft 6 is pushed rearward and the input shaft 6 slightly moves rearward, the front valve 14 that was open to the negative pressure side until then opens to the atmospheric pressure side, and becomes large in the front cylinder chamber 12A. Atmospheric pressure is introduced, and due to the pressure difference between the front and rear cylinder chambers 12A and 12B (negative pressure in the cylinder chamber 12B), the piston 13 is moved rearward, the output shaft 7 is pushed rearward, and the shift is performed. The lever 2a is rotated rearward.

When the change lever 1 reaches the shift completion position B, the front valve 14 that has been open to the atmospheric pressure side is opened to the negative pressure side, and the front cylinder chamber 12A is sucked to become negative pressure, and the piston 13 Stops at that position and stabilizes.

Further, when the change lever 1 is rotated forward from this state or the state in which the change lever 1 is located at the neutral position N described above, the input shaft 6 is pulled forward and is negative until then. The rear valve 15 that has been opened to the pressure side opens to the atmospheric pressure side, and the output shaft 7 is pulled back forward by the same operation as that in the above-mentioned case but only in the direction.

[0011]

[Problems to be solved by the device]

 In the conventional device as described above, the actual rotatable range of the change lever 1 is set in order to absorb manufacturing errors and assembly errors of each member of the linkage mechanism 3 and the influence of thermal expansion. Generally, a margin is provided by making it slightly wider than the rotation range between the front and rear shift completion positions A and B.

However, in this way, after the change lever 1 is rotated from the neutral position N to one of the front and rear shift completion positions A and B, the change lever 1 is further moved so as to exceed the positions A and B. If you continue to press 1, the booster 4 will operate during that time, and its output shaft 7 will try to move excessively, and the connection rod 20 behind the booster 4, the shift lever 2a, and the internal structure of the transmission 2 will be excessive. There is a problem that durability is deteriorated due to the application of various forces.

In view of the above-mentioned problems of the conventional technique, the present invention provides a power shift booster after the change lever reaches the shift completion position even if the change lever is excessively operated. An object of the present invention is to provide an operating device for a transmission, which can be prevented from operating and can prevent waste of energy consumption and deterioration of durability of components due to overload.

[0014]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention includes a negative pressure port connected to a negative pressure source and an atmospheric pressure port opened to the atmospheric pressure, in the middle of a link mechanism between a change lever and a transmission shift lever. , A power shift booster that moves the output shaft linked to the shift lever back and forth in the same direction as the input shaft by moving the input shaft linked to the change lever back and forth by the differential pressure between the negative pressure and the atmospheric pressure. In the transmission operating device that is provided, at least one of the negative pressure port and the atmospheric pressure port is in communication with an operating position that blocks communication with the other, and both ports are in communication with each other, and both ports are connected. By providing a solenoid valve that can be switched to the inoperative position where the pressure is set to equal, and when the change lever reaches the shift complete position, the connection from the change lever to the input shaft is completed. Are actuated by some mechanism, it is characterized in that a switch for switching the solenoid valve to the inoperative position.

[0015]

[Action]

 When the change lever reaches the complete shift position, the switch is actuated, thereby switching the solenoid valve to the non-actuated position, and substantially connecting the negative pressure port and the atmospheric pressure port of the power shift booster. The power shift booster is inoperative.

Therefore, even if the change lever is excessively operated thereafter, the power shift booster does not operate, and it is possible to prevent a harmful effect due to the excessive operation.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a first embodiment of the present invention. It should be noted that the same components as those of the conventional one shown in FIG. 3 are shown with the same reference numerals and the detailed description thereof will be omitted. The internal structure of the power shift booster (hereinafter simply referred to as a booster) 4 is not shown because it is not directly related to the present invention.

In the first embodiment, the atmospheric pressure port is provided in the middle of the pipe 21 that connects the intermediate point P of the pipe 9 between the negative pressure port 10 of the booster 4 and the negative pressure source 8 and the atmospheric pressure port 11. 11 to the atmospheric pressure, and the operating position (state of FIG. 1) where the atmospheric pressure port 11 and the negative pressure port 10 and the negative pressure source 8 are cut off, and the atmospheric pressure port 11 is connected to the negative pressure port 10 and A solenoid valve 22 that can be switched to an inoperative position (a state in which it is pushed down from the state of FIG. 1) communicating with the negative pressure source 8 is provided, and a part of the linkage mechanism 3 from the change lever 1 to the input shaft 6 of the booster 4 When the change lever 1 reaches the shift completion position A or B, the change lever 1 comes into contact with the drooping arm 18a of the lever 18 and is actuated at a proper position on the vehicle body (not shown) in front of and behind the drooping arm 18a of the lever 18. , Solenoid valve 22 in the inoperative position A pair of front and rear limit switches 23A and 23B are provided for switching to.

That is, both limit switches 23A and 23B are electrically connected in parallel between the battery 24 and the solenoid valve 22, and one of the limit switches 23A and 23B is operated, whereby the solenoid valve 22 is operated. Is excited to switch to the inoperative position.

According to the first embodiment, when the change lever 1 reaches either shift completion position A or B, the limit switch 23A or 23B is actuated, whereby the solenoid valve 22 is switched to the inoperative position and the booster is activated. Since the negative pressure port 10 and the atmospheric pressure port 11 of No. 4 communicate with each other and are connected together to the negative pressure source 8, no differential pressure is generated in the booster 4, and the booster 4 becomes inoperative.

That is, even if the input shaft 6 is slightly moved by the excessive rotation of the change lever 1, the driving force of the output shaft 7 due to the original differential pressure of the booster 4 is not generated.

Therefore, unnecessary operation of the booster 4 can be prevented and wasteful energy consumption can be eliminated, and excessive operation of the booster 4 imposes an excessive load on the transmission 2 and the like, resulting in reduced durability thereof. It is also possible to prevent the risk of being cut.

FIG. 2 shows a second embodiment of the present invention.

In the second embodiment, the negative pressure port 10 of the booster 4 is connected to the negative pressure source 8 and the negative pressure port 10 is communicated with the negative pressure source 8 in the middle of the pipe 9. The operating position (state of FIG. 2) that shuts off the communication between the negative pressure port 10 and the negative pressure source 8, and the negative pressure port 10 is opened to the atmospheric pressure. That is, it is possible to switch to an inoperative position (a state in which the negative pressure port 10 and the atmospheric pressure port 11 are substantially in communication with each other), which is the same state as when the negative pressure port 10 and the atmospheric pressure port 11 are communicated with each other (the state in which the negative pressure port 10 is pushed to the right in the drawing). A valve 25 is provided, which is energized by actuating any one of the limit switches 23A and 23B similar to that of the first embodiment, and is switched to the inoperative position.

With the configuration of the second embodiment, in addition to the same operation and effect as those of the first embodiment, the negative pressure source 8 is completely removed when the limit switches 23A and 23B are operated. Since it is cut off and is not consumed at all, there is an advantage that energy can be used more effectively.

The limit switches 23A and 23B may be operated by directly contacting the change lever 1.

[0028]

[Effect of the device]

 According to the present invention, the following effects can be achieved. (a) When the change lever reaches the shift completion position, the booster becomes inoperable. Therefore, even if the change lever is operated excessively, the booster will be installed on the connecting rod behind the booster, the shift lever of the transmission, and the internal structure. It is possible to prevent an excessive load from being applied due to the excessive operation of, and in that sense, it is possible to improve durability. (b) Further, even if the change lever is excessively operated, the booster does not operate, so that wasteful energy consumption can be eliminated and energy can be effectively used.

[Brief description of drawings]

FIG. 1 is a schematic side view of a first embodiment of the present invention.

FIG. 2 is a schematic side view of a second embodiment of the present invention.

FIG. 3 is a schematic vertical sectional side view of a conventional device.

[Explanation of Codes] 1 Change Lever 2 Transmission 2a Shift Lever 3 Linkage Mechanism 4 Power Shift Booster 6 Input Shaft 7 Output Shaft 8 Negative Pressure Source 10 Negative Pressure Port 11 Atmospheric Pressure Port 12 Cylinder 12A, 12B Cylinder Chamber 13 Piston 14, 15 Valve 16, 18 Lever 17, 19, 20 Connecting rod 18a Drooping arm 22, 25 Solenoid valve 23A, 23B Limit switch (switch) 24 Battery A, B Shift complete position N Neutral position

Claims (1)

[Claims for utility model registration] [Claim 1] A negative pressure port connected to a negative pressure source and an atmospheric pressure port opened to the atmospheric pressure are provided in the middle of the linking mechanism between the change lever and the transmission shift lever. In addition to the power shift, the input shaft linked to the change lever moves back and forth to move the output shaft linked to the shift lever back and forth in the same direction as the input shaft due to the differential pressure between negative pressure and atmospheric pressure. In a transmission operating device provided with a booster, at least one of the negative pressure port and the atmospheric pressure port is made to communicate with an operating position that blocks communication with the other and substantially the other, and both ports are connected. By providing a solenoid valve that can be switched to a non-actuated position to make the pressure equal and the change lever reaches the shift complete position, the linkage from the change lever to the input shaft is linked. An operating device for a transmission, comprising a switch which is operated by a part of a mechanism to switch the solenoid valve to an inoperative position.