JP2001027318A - Transmission shift operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a transmission shift operating device compact and to reduce the number of parts thereof. SOLUTION: An electric motor 23 with a decelerator 24 rotating a shift shaft 21 of a transmission mechanically connected to a change lever is provided. The change lever is provided with an operating direction detecting switch a shift operating direction and an actuating position detecting means detecting an actuating position of the shift shaft 21 of the transmission. A controller controls driving of the electric motor 23 by an output signal from the operating direction detecting switch and the actuating position detecting means. An output shaft 46 of the decelerator 24 united to the electric motor 23 is connected to an outer lever 49 of the shift shaft 21 through an output lever 47 and a link rod 48. The decelerator 24 has a one step slowing-down structure using a worm gear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission shift operation device for reducing the shift operation force of a change lever.

[0002]

2. Description of the Related Art In a transmission shift operation device for a vehicle, a select side and a shift side of a change lever are mechanically connected to a select lever and a shift lever of a transmission via cables and the like, respectively. On the side, a booster for boosting the shift operation force is provided. Conventionally, as such a transmission shift operation device, one having a configuration in which boosting is performed using air pressure is generally used.

The conventional transmission shift operation device using the air pressure is large in size, heavy in weight, and difficult to be compact. There was a problem that the load capacity was greatly affected. In addition, since small and medium-sized trucks and the like are hardly equipped with an air pressure source, it is difficult to use a conventional transmission shift operation device using the air pressure.

In view of this, recently, a transmission shift operating device configured to boost the power using an electric motor has been proposed (JP-A-6-331024, JP-A-10-299).
No. 892). FIG. 8 shows an electric motor-type transmission shift operating device described in the above-mentioned publication. The transmission shift operating device includes an electric motor 1, a speed reducer 2 attached to the motor 1, and a shaft of the motor 1. , A power rod 4, a rack 5 provided on the power rod 4 and meshing with the pinion 3, a control rod 9 supported in parallel with the power rod 4 in a case 6, and a return spring 10 for the control rod 9. A sensor 12 for detecting the movement of the control rod 9, a lever 13 for connecting the end of the control rod 9 and the end of the power rod 4, and having a shift cable mounting portion 14.
Etc. are provided.

[0005] In this transmission shift operating device,
In a free state, the spring 10 holds the control rod 9 at the center position, and the electric motor 1 is stopped. When a force in any direction is applied to the end of the lever 13 and moved, the lever 13 tilts, the control rod 9 moves in the opposite direction,
The movement is detected by the sensor 12 and the control rod 9
, The output and rotation direction of the electric motor 1 are controlled.

The speed reducer 2 drives the pinion 3 by reducing the rotation of the electric motor 1, and the pinion 3 applies a force to the power rod 4 via the rack 5 in the same direction as the force applied to the end of the lever 13. At the same time as assisting the movement, the control rod 9 is returned via the lever 13. Control rod 9
Returns to the center, this is detected by the sensor 12, the electric motor 1 is stopped, and the power rod 4 is also stopped.

[0007]

The transmission shift operating device using the electric motor described in the above publication has a problem that it is structurally large and difficult to make compact. Another problem is that the link, upper cover, and the like of the conventional manual transmission must be changed. Further, when the motor stops operating due to a mechanical failure or an electrical failure of the electric motor or the speed reducer, there is a problem that the shift operation becomes extremely heavy or the shift operation becomes impossible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a transmission shift operating device which is compact, has excellent mountability on a vehicle, and can reduce the number of parts. Things. It is another object of the present invention to provide a transmission shift operation device that can be manually operated even when an electric motor or a speed reducer fails, and that improves fail-safe performance. Further, it is another object of the present invention to provide a transmission shift operating device which can be mounted as it is without changing the structure of a conventional manual transmission and can share parts with the conventional manual transmission. Things.

[0009]

A transmission shift operating device according to the present invention is provided with a change lever, operation direction detecting means for detecting a shift operation direction of the change lever, and mechanically connected to the change lever. A motor with a speed reducer for rotating a shift shaft of the transmission, an operating position detecting means for detecting an operating position of the shift shaft of the transmission, and the speed reducer based on signals from the operating direction detecting means and the operating position detecting means A control device for controlling the driving of the motor with a gear, and in particular, an output shaft of the electric motor with a speed reducer is connected to an outer lever of the shift shaft via an output lever and a link mechanism. is there.

Further, in the transmission shift operating device according to the second invention, the speed reducer has a one-stage speed reduction structure,
The length of the output lever is shorter than the length of the outer lever.

Further, the transmission shift operating device according to a third aspect of the present invention is provided with a manual separating means for manually disconnecting the connection between the output lever and the outer lever.

A transmission shift operating device according to a fourth aspect of the present invention is provided with a mounting hole for a vehicle body frame provided in a housing of the speed reducer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 is a schematic configuration diagram showing a simplified overall configuration of a transmission shift operation device according to an embodiment of the present invention. The transmission shift operation device includes operation direction detection switches 18 and 18 as operation direction detection means for detecting two shift operation directions of the change lever 16, and a transmission 20 mechanically connected to the change lever 16. An electric motor 23 for rotating the shift shaft 21, and a shift position detecting switch 26 as an operating position detecting means 27 for detecting the operating position of the shift shaft 21.
26 and a neutral position detection switch 30.

In this transmission shift operating device, the operation direction detecting switches 18 and 18 are connected to the knob 3 of the change lever 16.
The electric motor 23 and the speed reducer 24 attached to the motor 23 are mounted on a vehicle body frame 33. A striker 22 is attached to a predetermined position of the shift shaft 21, and one end is supported by a body frame 33. The transmission 20 is provided with a select operation lever 34.

The change lever 16 is rotatable about a lever shaft 35, and has a knob 37 attached to an upper end of a lever body 36 and two operation direction detecting switches 18 and 18 provided in the knob 37. The operation direction of the operation force applied to the knob 37 at the time of the shift operation is detected by the operation direction detection switches 18, 18, and the detection result is transmitted as an operation direction signal via the signal line 41 to the controller 4.
Sent to 0.

The electric motor 23 is provided with a speed reducer 24. The forward and reverse rotation directions and the amount of rotation are controlled by a command signal sent from the controller 40 via a signal line 42 during a shift operation. The output lever 47 fixed to the output shaft 46 is rotated. The electric motor 23 and the speed reducer 24 will be described in detail with reference to FIGS. The speed reducer 24 includes a worm (not shown) attached to an input shaft (output shaft of the electric motor 23) 80 and a worm wheel 82 attached to an output shaft 46 orthogonal to the input shaft 80. This is a one-stage reduction structure using a worm gear 84. Therefore, by using the worm gear 84 for the speed reducer 24, the output shaft 80 of the electric motor 23 and the output shaft 46 of the speed reducer 24 can be arranged at orthogonal positions, and the output shaft 80 of the electric motor 23 is moved along the vehicle body frame 33. Since it can be arranged in a position, the mountability on a vehicle is improved.

The housing 86 of the speed reducer 24 is provided with a mounting hole 86a for mounting on the vehicle body frame 33. The electric motor 23 and the speed reducer 24 are mounted directly on the vehicle body frame 33 without using a mounting bracket. You can do it.

The tip of an output lever 47 fixed to the output shaft 46 of the speed reducer 24 is connected to the tip of an outer lever 49 via a link rod 48. The outer lever 49 is attached to the shift shaft 21 of the transmission 20 and is connected to the lower end of the change lever 16 via a shift operation wire cable 51 (see FIG. 1). , And output lever 4
7, and the shift shaft 21 rotates. In this embodiment, the outer lever 49 attached to the shift shaft 21 of the transmission 20 has twice the length of the output lever 47 attached to the output shaft 46 of the speed reducer 24. The lever ratio of the outer lever 49 is 1: 2. The outer lever 49 and the link rod 48 of the transmission 20 are detachably connected by a pin connection, a screw connection, or the like.
The manual separating means is configured so that the electric motor 23 or the speed reducer 24 can be separated manually when a failure occurs.

The operating position detecting means 27 comprises two shift position detecting switches 26, 26 which are arranged on one side in the circumferential direction of the shift shaft 21 so as to be shifted in the axial direction, and the other side in the circumferential direction of the shift shaft 21. And a neutral position detection switch 30 disposed at the center position. Then, the two shift position detection switches 26, 26 detect the shift positions A, B of the shift pattern P shown in FIG. 4, respectively, and the neutral position detection switch 30 detects the neutral position N of the shift pattern P. It has become.

The controller 40 receives an operation direction signal sent from the two operation direction detection switches 18 and 18 via a signal line 41 and sends a command signal to the electric motor 23 via a signal line 42 based on the signal. The motor 23 is rotated forward and reverse, and control for stopping the electric motor 23 is performed based on the neutral position or shift position detection signal of the shift shaft 21 sent from the operating position detecting means 27 via the signal line 43. The select lever 34 of the transmission 20 is connected to the change lever 16 by a select wire cable 52.

The operation of the transmission shift operating device according to the embodiment will be described. The select operation is performed by moving the select lever 34 through the select wire cable 52 by manual operation of the change lever 16, while the shift operation is performed by the above-described transmission shift operating device as follows. Will be When shifting from the neutral position to the second-gear shift position, depressing the clutch pedal and operating the change lever 16 in the two-gear direction,
The operation direction detection switch 18 is turned on at a point where the stroke exceeds the play range of the change lever 16 (a point at which the operation force exceeds a predetermined value).

When the operation direction detection switch 18 is turned on,
Since the neutral position detection switch 30 of the transmission 20 is on and the switch 18 of the change lever 16 is on, the controller 40 determines that the shift is from the neutral position to the second gear. If the clutch switch 55 is on (clutch is disconnected), the electric motor 23 is driven to shift the shift pattern P.
When the shift shaft 21 is rotated in the direction A in FIG.
Stop 3 When the clutch switch 55 is off, the electric motor 23 is not driven.

Next, a description will be given of a case where the shift from the second shift position to the neutral position is performed. When the clutch pedal is depressed and the change lever 16 is operated toward the neutral position, the operation direction detection switch 18 of the change lever 16 is turned on. Since the neutral position detection switch 30 is off and the operation direction detection switch 18 is on,
It is determined that the shift is from the second shift position to the neutral position, and if the clutch switch 55 is on, the motor 23 is driven,
The shift shaft 21 is rotated in the direction B in the shift pattern P. When the neutral position detection switch 30 is turned on, the electric motor 23 is stopped.

In the transmission shift operating device having the above-described structure, the speed reducer 24 of the electric motor 23 has a single-stage speed reduction structure using a gear mechanism such as a worm gear 84 which can obtain a large gear ratio. Can be reduced in size and weight, and the mountability on a vehicle can be improved. Further, the number of parts such as bearings and gears can be reduced. In addition, the output lever 47 of the speed reducer 24 is connected to the outer lever 49 of the transmission 20 via a link mechanism (link rod 48), and the length of the outer lever 49 is twice the length of the output lever 47. I have to. Therefore,
Since the required reduction ratio is obtained by the reduction gear 24 and the lever ratio of the levers 47 and 49, the reduction ratio of the reduction gear 24 can be reduced by increasing the reduction ratio by the lever mechanism. The size of the speed reducer 24 can be reduced.

In addition, the electric motor 23 and the speed reducer 24
Is connected to the transmission 20 via the link rod 48, so that there is also an advantage that the degree of freedom of the vehicle mounting position is large. Needless to say, the lever ratio of the output lever 47 of the speed reducer 24 to the outer lever 49 of the transmission 20 is not limited to 1: 2. Further, by changing the lever ratio, the present invention can be applied to various transmissions 20 without changing the speed reducer 24.

An output lever 47 attached to an output shaft 46 of the speed reducer 24 and an outer lever 49 of the transmission 20 to which a shift cable 51 for manual operation is connected are connected via a link rod 48. With this structure, the electric motor 23 can be connected without changing the structure of the conventional manual transmission. Therefore,
Parts can be shared with the conventional manual transmission. Further, since the housing 86 of the speed reducer 24 is provided with a mounting hole 86a for the vehicle body frame 33, a bracket for mounting the electric motor 23 with the speed reducer 24 on the vehicle is not required, and the number of parts can be reduced. It is possible to achieve weight reduction and compactness.

Further, in the above embodiment, the transmission 20
The outer lever 49 and the link rod 48 are connected by a pin connection or a screw connection, and can be separated manually, so that the failure of the reduction gear 24 or the electric motor 23 locks the electric motor 23 with the reduction gear. If the shift operation of the transmission 20 cannot be performed by operating the change lever 16, the outer lever 49
By disconnecting the link from the link rod 48, manual shift operation becomes possible, and fail-safe performance is improved.

In the above embodiment, the shift position detecting switches 26, 26 and the neutral position detecting switch 30 are used as the operating position detecting means 27 for detecting the operating position of the shift shaft 21 of the transmission 20. The operation position of the shift shaft 21 may be detected using an angle sensor or the like without being limited to the simple position detection switches 26 and 30.

FIG. 5 is a schematic configuration diagram showing a transmission shift operating device according to a second embodiment, and FIG. 6 is a side view of a main part of FIG. This transmission shift operating device includes an electric motor 2
3 is provided with an angle sensor 28 (see FIG. 6) for detecting the rotation angle of the output shaft 46 of the speed reducer 24, and is used in combination with the neutral position detection switch 30 similar to the first embodiment. The sensor 28 and the neutral position detection switch 30 of the shift shaft 21 of the transmission 20 serve as operating position detecting means 27 for detecting a shift position. In this case, the controller 40 stores the output value of the angle sensor 28 based on the rotation angle of the output shaft 46 of the speed reducer 24 corresponding to the neutral position and the shift position of the transmission 20.

The second embodiment is the same as the first embodiment except for the configuration described above, and therefore, the same portions are denoted by the same reference characters and description thereof is omitted. Regarding the operation, instead of detecting the position of the shift shaft 21, the rotation angle of the output shaft 46 of the speed reducer 24 is
Is the same as that of the first embodiment except that the detection is different. According to the second embodiment, the shift shaft 21
Is detected by the angle sensor 28, the position of the shift shaft 21 can be constantly grasped, and the shift operation can be controlled more accurately and quickly than in the case of the first embodiment. There is an advantage that you can.

FIG. 7 is a schematic configuration diagram showing a transmission shift operating device according to a third embodiment. This transmission shift operating device uses an angle sensor 28 fixed to a vehicle frame 33 as an operating position detecting means 27, and the shift shaft 21 has a second lever 6 separate from an outer lever 49.
The movement of the shift shaft 21 is detected by the angle sensor 28 via the second lever 67. In this case, the movement of the outer lever 49 may be detected by the angle sensor 28. The other configuration is the same as that of the first embodiment, and the operation is the same as that of the second embodiment. The second and third embodiments can also provide the same effects as the first embodiment.

[0032]

As described above, according to the present invention, the change lever, the operation direction detecting means for detecting the shift operation direction of the change lever, and the shift of the transmission mechanically connected to the change lever are provided. An electric motor with a speed reducer for rotating a shaft, operating position detecting means for detecting an operating position of a shift shaft of the transmission, and a motor with a speed reducer based on signals from the operating direction detecting means and the operating position detecting means. A transmission shift operating device comprising a control device for controlling driving, wherein an output shaft of a speed reducer coupled to the electric motor is connected to an outer lever of the shift shaft via an output lever and a link mechanism. The electric motor that boosts the shift operation force can be mounted without changing the configuration of the conventional manual transmission. It is possible to Yuaru type transmission and common parts.

Further, the reduction gear has a one-stage reduction structure and the length of the output lever is shorter than the length of the outer lever, so that the reduction gear can be reduced in size and weight. The mountability on the vehicle is improved.

Further, by providing a manual separating means for manually disconnecting the connection between the output lever and the outer lever, the outer lever can be disconnected from the electric motor side even if the speed reducer, the electric motor or the like breaks down. As a result, the shift operation can be performed manually, so that fail-safe performance is improved.

Further, by providing a mounting hole to the body frame in the housing of the speed reducer, a bracket for mounting the electric motor with the speed reducer on the vehicle is not required, and the number of parts can be reduced. Weight saving,
Compactness can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a transmission shift operation device according to an embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view showing a main part of FIG.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a diagram illustrating an example of a shift pattern.

FIG. 5 is a schematic configuration diagram of a transmission shift operation device according to a second embodiment of the present invention.

FIG. 6 is a side view of a main part of FIG. 5;

FIG. 7 is a schematic configuration diagram of a transmission shift operation device according to a third embodiment of the present invention.

FIG. 8 is a sectional view showing an example of a conventional transmission shift operation device.

[Explanation of symbols]

 Reference Signs List 16 change lever 18 operation direction detection means (operation direction detection switch) 20 transmission 21 shift shaft 23 electric motor 24 speed reducer 27 operating position detection means 40 control device (controller) 46 output shaft of reduction gear 47 output lever 48 link mechanism ( Link rod) 49 Outer lever

Continued on the front page (72) Inventor Kunio Okada 2-11-6 Shinmeicho, Higashimatsuyama-shi, Saitama F-term in the Matsuyama Plant of Automotive Equipment Co., Ltd. (Reference) 3J067 AA01 AB06 AB23 BA52 BA56 CA32 DA02 DA43 DB32 FB63 FB73 FB83 FB90

Claims (4)

[Claims] 1. A change lever, an operation direction detecting means for detecting a shift operation direction of the change lever, and an electric motor with a speed reducer for rotating a shift shaft of a transmission mechanically connected to the change lever. Operating position detecting means for detecting an operating position of a shift shaft of the transmission, and a control device for controlling driving of the electric motor with a speed reducer based on signals from the operating direction detecting means and the operating position detecting means. A transmission shift operating device, wherein an output shaft of the speed reducer is connected to an outer lever of the shift shaft via an output lever and a link mechanism. 2. The transmission shift operating device according to claim 1, wherein the speed reducer has a one-stage speed reduction structure, and a length of the output lever is shorter than a length of the outer lever. 3. The transmission shift operating device according to claim 1, further comprising a manual separating unit that can manually disconnect a connection between the output lever and the outer lever. 4. The transmission shift operating device according to claim 1, wherein a mounting hole for a vehicle body frame is provided in a housing of the speed reducer.