JP3402127B2 - Electric step device with manual storage mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric step device for assisting an occupant in getting in and out of a vehicle, and more particularly to an electric step device with a manual retracting mechanism capable of manually extending or retracting a step for getting on and off. .

[0002]

2. Description of the Related Art Conventionally, in a vehicle in which the vehicle floor is high and it is difficult to get on and off the floor surface directly from the ground surface, a step for getting on and off is provided below the door opening on the side of the vehicle. This step for getting on and off is generally a fixed type,
It is necessary to install the boarding / alighting step so that it fits within the width of the vehicle, and the fixed type is not easy to use.

Therefore, a movable step for getting on and off has been developed so that the step can be put into the vehicle width when it is extended and stored rather than the vehicle width when used. In particular, an electric step device has also been developed, which can be automatically driven by an electric motor between the extended state and the stored state of the step.

[0004]

By the way, in the above-mentioned electric step device, when the electric motor fails or is broken, the step may be stuck in the overhanging state or during the overhanging or storing. In this case, the step may project laterally from the vehicle and hinder the running of the vehicle. In addition, when the step does not move in the stored state or during extension, the step cannot be used effectively.

Therefore, in the case of such an electric step device, it is necessary to prepare some countermeasures in case of failure of the step driving motor or the like. By the way, Japanese Utility Model Publication No. 6-41883 proposes such an electric step device, and also proposes a countermeasure against a failure of the step drive system. In this technique, the boarding / alighting step and the lower part of the vehicle are connected by a link mechanism that swings in a vertical plane, so that the boarding / alighting step can be extended and retracted in the vehicle width direction. Also,
An electric motor is disposed under the vehicle floor, and a drive shaft of the electric motor and a vehicle-side rotating shaft that pivotally supports a link arm of the link mechanism so as to integrally rotate are connected to a connecting arm. As a result, the rotation of the electric motor is transmitted to the rotary shaft via the drive shaft and the connecting arm, and the link arm supported by the rotary shaft is swung to perform the extension drive or the storage drive of the boarding / alighting step. Has become.

As described above, in the case of the step for getting on and off, which is supported by the link mechanism swinging in the vertical plane, the step is displaced downward when the load by the passenger getting on and off is applied to the step when the step is extended. In the electric step device, when the overhang is completed, the rigidity is improved by placing the electric motor in an overloaded state in a direction counteracting the load applied to the step for getting on / off, and preventing the step displacement (sinking) due to the load for getting on / off.

Further, in this electric step device, an emergency cock that can cut off the power connection between the electric motor and the drive shaft of the electric motor is provided under the floor of the vehicle. In an emergency, the emergency cock is operated. Then, the power connection between the electric motor and the drive shaft is disconnected, and the electric step can be manually moved. However, Japanese Utility Model Publication No. 6-41883 does not disclose a specific configuration of the emergency cock.

For example, at the time of manual storage, the floor of the vehicle is opened and the emergency cock is operated to disconnect the electric motor from the drive shaft to release the boarding / alighting step from the load resistance of the electric motor. The boarding / alighting step can be manually moved to the storage position and held in the storage position.
As described above, in the technique described in the publication, in the manual operation, the vehicle floor is opened and the emergency cock under the floor is operated to release the step for getting on and off from the load resistance of the electric motor, and then the step for getting on and off. The manual operation is not easy because there is a need for a procedure of manually moving the step, and the operation is troublesome, and it is also necessary to operate the emergency cock at the same time while manually holding the steps.

Further, when an attempt is made to manually extend and use the step for getting on and off the electric motor when the electric motor fails, unless the torque for lifting the step for getting on and off is generated in the electric motor, the step for getting on and off is caused by the load at the time of getting on and off. It is difficult to use subduction and boarding steps. The present invention was devised in view of such problems, and when a step drive system such as an electric motor fails, it is possible to easily store and extend the lifting step by manual operation. It is an object of the present invention to provide an electric step device with a manual storage mechanism.

[0010]

In order to achieve the above object, in an electric step device with a manual mechanism according to the present invention as set forth in claim 1, a movable member disposed below a door opening of a vehicle is driven by an electric motor. The step for loading and unloading is driven between the storage fixed state and the extension fixed state to be the storage fixed state when stored and to the extension fixed state when used, but if it is necessary to drive the step manually, By manually rotating the rotation operation part provided on the power transmission rotary shaft interposed between the electric motor and the step side from the outside, the step is stored in the fixed fixed state and the extended fixed state. Allows you to drive between. Also, the rotation for power transmission
Of the torque between the shaft and the rotating shaft on the side of the electric motor
The limiter transfers torque between them according to the input torque.
Since it shuts off mechanically,
This torque limiter is used when rotating
The torque transmission is cut off, and the electric motor side becomes a load.
Without manually driving the step.
You can follow.

According to another aspect of the present invention, there is provided an electric stepping device with a manual mechanism , in which a vehicle door is opened by an electric motor.
A movable step for getting on and off located below the mouth is fixed.
It drives between the fixed state and the extended fixed state so that it can be stored when stored.
It is fixed in the storage state, and in the extended state when used,
If it is necessary to drive the step manually,
Installed on the power transmission rotary shaft interposed between the step side
Rotate the rotating operation part manually from the outside.
By making it, the step can be stored and fixed
It is possible to drive between states. In addition, the rotary operation
A nut fixed concentrically to the power transmission rotary shaft.
Wrench for attaching and detaching the vehicle tire wheel fixing nut
By engaging and rotating this wrench manually,
Manual driving of the step can be performed.

According to another aspect of the present invention, there is provided an electric step device with a manual mechanism , wherein the power transmission rotary shaft and the electric motor are provided.
The torque limiter installed between the
To cut off the torque transmission between them according to the force torque
When manually rotating the rotation operation unit from the outside
In this case, the torque transmission is cut off by this torque limiter.
Therefore, the electric motor side does not become a load and can be operated manually.
Therefore, the manual driving of the step can be performed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 8 show an electric step device with a manual retracting mechanism as an embodiment of the present invention. , Will be described with reference to these figures. As shown in FIG. 2, this electric step device is installed in a lower portion of a door opening 30 provided on a side surface of an automobile, and a driving side link 11 and a driven side link 21 that operate in a substantially horizontal plane, and these links 11 are provided. Step 2 for getting on and off supported by
2 and the step 23 for getting on and off the vehicle is shown in FIG.
It can move substantially horizontally between the extended position indicated by the solid line and the storage position indicated by the chain line as indicated by arrow A1. In FIG. 2, reference numeral 31 is a door.

FIG. 3 is a side view of an essential part of the electric step device, and FIGS. 4 and 5 are schematic plan views of the electric step device. As shown in FIGS.
3 is installed on the base frame 22, and one end of each of the drive side link 11 and the driven side link 21 is rotatably supported at both ends of the base frame 22. These driving side link 11 and driven side link 2
The other end of each of the 1 is rotatably supported on the vehicle 24 side, and the driving side link 11, the driven side link 21, and the base frame 22 constitute a parallel link mechanism that operates substantially in a horizontal plane. . This allows the base frame 2
2 and the step 23 for getting on and off can be moved almost horizontally.

By the way, a shaft (step operation shaft) 1 for rotatably supporting the other end of the drive side link 11 on the vehicle 24 side.
0 is rotatably driven by the electric motor 15, and by rotating the step operation shaft 10, the drive side link 11 is rotated around the step operation shaft 10 to be used for the base frame 22 and the boarding / alighting operation. The step 23 is adapted to be taken in and out in the vehicle width direction.

Here, FIG. 1 is a perspective view showing the drive system of the step-in / out step 23. The output of the electric motor 15 will be described with reference to FIG. 1 according to the transmission path of the torque from the electric motor 15. The rotation is first input to the speed reduction mechanism 43. The deceleration mechanism 43 decelerates the rotation of the electric motor 15 to a required rotation speed and inputs it to the power transmission rotary shaft 1. The deceleration mechanism 43 connects the worm 14 fixed to the output shaft 15a of the electric motor 15 and the power transmission. The worm gear 31 is rotatably supported by the rotary shaft 1 for use and meshes with the worm 14.

By the way, the worm gear 31 is not fixed to the power transmission rotary shaft 1 but is rotatably supported, and the torque limiter 3 is provided between the worm gear 31 and the power transmission rotary shaft 1. The torque that is interposed and applied to the worm gear 31 is input to the power transmission rotary shaft 1 via the torque limiter 3. In addition,
The torque limiter 3 transmits the rotation between the worm gear 31 and the power transmission rotary shaft 1 only when the torque transmitted between the worm gear 31 and the power transmission rotary shaft 1 is equal to or less than a predetermined value. When the value exceeds a predetermined value, the transmission of this rotation is cut off to prevent the electric motor 15 from being overloaded. The detailed structure of the torque limiter 3 will be described later.

Next, the rotation input to the power transmission rotary shaft 1 is transmitted to the step operation mechanism 41 from the output gear 4 fixed to the power transmission rotary shaft 1 concentrically with the worm gear 31. It has become. That is, the step operation mechanism 41 includes the rotating body 5, the rotation shaft (step operation shaft) 10 that supports the drive side link 11, and the two latch members 6 and 7.
The latch base 8 and the lock member 12 are provided.

The rotary body 5 is rotatably supported on the step operation shaft 10, and the tooth portion 5A formed on the outer periphery is meshed with the output gear 4 of the power transmission rotary shaft 1 to transmit power. It serves as an input unit for rotation from the rotary shaft 1 for operation to the step operation mechanism 41. Further, projecting strikers 5a and 5b are provided on one surface of the rotating body 5. Further, the latch base 8 is arranged between the rotating body 5 and the drive side link 11, and is fixed to the step operation shaft 10. Figure 6
FIG. 7 is a plan view of an essential part showing the step operation mechanism 41. As shown in FIG. 6, the latch base 8 has a first latch member 6 and a second latch member 7 rotatably through shafts 6a, 7a. Installed, these latch members 6,
In the vicinity of 7, stoppers 8a and 8b are fixedly installed. The latch members 6 and 7 have hook portions 6A and 7A and convex portions 6B and 7B, respectively, and the first latch member 6 is rotated clockwise in FIG. 6 by the rotary spring 6b provided on the shaft 6a. The second latch member 7 is biased and is biased counterclockwise by the rotary spring 7b provided on the shaft 7a.

The strikers 5a and 5b of the rotating body 5 described above.
Is provided on the side of the latch base 8 and the strikers 5a and 5b move the latch members 6 and 7 by contacting the latch members 6 and 7 when the rotating body 5 rotates. That is, when the rotating body 5 rotates clockwise in FIG. 6, the first striker 5 a moves to the first latch member 6
The first latch member 6 is rotated counterclockwise around the shaft 6a by coming into contact with the convex portion 6B. And
When the first latch member 6 rotates counterclockwise around the shaft 6a and comes into contact with the stopper 8a, the rotating body 5 rotates integrally with the latch base 8 in the clockwise direction.

On the contrary, when the rotary body 5 rotates counterclockwise in FIG. 6, the second striker 5b comes into contact with the convex portion 7B of the second latch member 7 and the second latch member 7 is brought into contact therewith.
When the second latch member 7 contacts the stopper 8b by rotating the shaft 7a in the clockwise direction around the shaft 7a, the rotating body 5 is integrated with the latch base 8 and rotates counterclockwise.

The lock member 12 is composed of the latch members 6 and 6.
7 is provided separately from the step operation shaft 10 in the rotation direction around the step operation shaft 10. This lock member 12
Includes two locking portions 12A and 12B and a stopper wall 12a,
When the latch base 8 rotates clockwise in FIG. 6, the latch base 8 comes into contact with the stopper wall 12a to stop the rotation, and the hook portion 7A of the second latch member 7 engages with the locking portion 12A. It is supposed to meet.

On the contrary, when it rotates counterclockwise, it comes into contact with the stopper wall 12b to stop the rotation, and the hook portion 6A of the first latch member 6 engages with the locking portion 12B. . Also, on the back side of the locking portions 12A, 12B,
The detectors 13A and 13B are provided, and the hook portion 6
When A and 7A are engaged with the locking portions 12B and 12A, the electric motor 15 is stopped.

As described above, in this apparatus, the stepping-on / off step 23 is held by the latch mechanism in either the storage fixed state or the extended fixed state. Here, the torque limiter 3 will be described in detail with reference to FIG.
FIG. 8 is a cross-sectional view schematically showing the structure of the torque limiter 3. As shown in FIG. 7, the torque limiter 3 is a rotary member 3 fixed to the worm gear 31 and the power transmission rotary shaft 1.
The torque transmission between the worm gear 31 and the rotating member 32 is controlled by the engaging member (ball) 33 interposed between the worm gear 31 and the rotating member 32. There is.

That is, the rotary member 32 is fixed to the power transmission rotary shaft 1 concentrically with the worm gear 31, and a plurality of spring holes 32a are formed on the rotary member 32 side. The spring 34 is first inserted in the spring hole 32a, and then the ball 33 is fitted therein. On the other hand, on the rotating member 32 side of the worm gear 31, a receiving hole 31a is provided at a position corresponding to the spring hole 32a, and a part of the ball 33 urged by the spring 34 is fitted therein.

As a result, for example, when a rotational torque is applied to the worm gear 31, the ball 33 is received from the receiving hole 31a.
Further, when the rotation torque is transmitted to the rotating member 32 side through the spring hole 32a and, for example, the rotation torque is applied to the power transmitting rotary shaft 1, the spring hole 32a of the rotating member 32 passes through the ball 33 and the receiving hole 31a to the worm gear 31. Rotational torque is transmitted.

When the torque acting between the worm gear 31 and the rotating member 32 is equal to or less than a predetermined value during the transmission of the rotational force, the ball 33 is fitted in the receiving hole 31a and the worm gear 31 and the rotating member. Although the rotation is transmitted between the ball 32 and the worm gear 32, when a torque of a predetermined value or more acts between the worm gear 31 and the rotating member 32, the large torque causes the ball 33 to resist the urging force of the spring 34. And spring hole 3
It is adapted to be disengaged from the retracted receiving hole 31a on the 2a side so that the transmission of rotation between the worm gear 31 and the rotating member 32 is interrupted.

By the way, the power transmission rotary shaft 1 is extended below the originally necessary portion (output gear 4 mounting portion), and the lower end portion of the rotary shaft 1 is manually rotated from the outside. There is provided a rotation operation section 42 capable of manually driving step 23. The rotary operation part 42 includes a downwardly extending portion of the power transmission rotary shaft 1 (hereinafter referred to as a manual operation shaft 2) and a rotary shaft 1 at the tip of the manual operation shaft 2.
And a nut (or bolt) 2a fixed concentrically therewith. The nut 2a is a nut (or bolt) of the same size as the tire wheel fixing nut, and has a diameter corresponding to the tire wheel fixing nut removing / attaching wrench 16 of the vehicle tool.

Since the electric stepping device with the manual retracting mechanism as one embodiment of the present invention is constructed as described above, in the case of normal automatic extension, the rotation of the electric motor 15 is controlled by the output shaft 15a. It is transmitted to the worm gear 31 from the worm 14 fixed to the worm. Then, it is transmitted to the power transmission rotary shaft 1 via the torque limiter 3, and is output to the step operation mechanism 41 from the output gear 4 fixedly mounted on the power transmission rotary shaft 1.

In the step operation mechanism 41, the rotating body 5 is rotated clockwise in FIG. 6 by the input from the output gear 4. When the rotating body 5 rotates clockwise, the striker 5a comes into contact with the convex portion 6B of the first latch member 6 and the first
The latch member 6 is rotated counterclockwise around the shaft 6a. The rotated first latch member 6 abuts the stopper 8a, the rotational force from the rotating body 5 is applied to the latch base 8, and the latch base 8 rotates together with the rotating body 5 in the clockwise direction. Since the latch base 8 is fixed to the step operation shaft 10, the drive side link 11 whose one end is supported by the step operation shaft 10 also rotates in the clockwise direction, and the step 2
3 is projected from the vehicle side surface 24.

The projecting operation of the boarding / alighting step 23 is stopped by the latch base 8 coming into contact with the stopper wall 12a of the lock member 12. Then, the hook portion 7 of the second latch member 7 rotated clockwise with the latch base 8
When A is engaged with the locking portion 12A of the lock member 12 and detected by the detector 13A, the electric motor 15 stops. At this time, the stop of the electric motor 15 is delayed from the stop of the rotation of the step operation shaft 10. However, the torque limiter 3 is provided between the electric motor 15 and the power transmission rotary shaft 1, and the predetermined limit is provided. When a torque equal to or larger than the value is applied, the torque transmission between the rotating member 32 and the worm gear 31 is cut off, so that the electric motor 15 is not overloaded.

On the contrary, in the case of automatic storage, the electric motor 1
5 rotates in the opposite direction to the automatic extension, and the output gear 4 outputs the rotation opposite to the automatic extension to the step operation mechanism 41. In the step operation mechanism 41, the rotating body 5 rotates counterclockwise in FIG. 6 by the input from the output gear 4. When the rotating body 5 rotates counterclockwise, the striker 5b abuts the convex portion 7B of the second latch member 7 to rotate the second latch member 7 clockwise about the shaft 7a, and the second rotated member 7B rotates. The latch member 7 contacts the stopper 8b. And
The latch base 8 rotates counterclockwise integrally with the rotating body 5 due to the rotational force from the rotating body 5, and the drive side link 11 whose one end is supported by the rotating shaft 10 also rotates counterclockwise to allow the passenger to get on and off. The step 23 is stored in the side surface 24 of the vehicle.

The retracting operation of the boarding / alighting step 23 is stopped by the latch base 8 coming into contact with the stopper wall 12b of the lock member 12. Then, the hook portion 6 of the first latch member 6 rotated clockwise together with the latch base 8.
The electric motor 15 stops when A is engaged with the locking portion 12B of the lock member 12 and detected by the detector 13B. At this time, as in the case of automatic extension, the electric motor 1
Although the stop of 5 is delayed from the stop of the rotation of the step operation shaft 10, the electric motor 15 and the rotary shaft 1 for power transmission are stopped.
Since the torque limiter 3 is provided between and, the electric motor 15 will not be overloaded.

Next, at the time of manual extension, the tire wheel fixing nut removal wrench 16 mounted on the vehicle is attached to the nut 2a.
1 and 8, the power transmission rotary shaft 1 coaxial with the manual operation shaft 2 is rotated counterclockwise in FIG. 1 and FIG. Then, the rotation is input to the step operation mechanism 41 from the output gear 4 fixed to the power transmission rotary shaft 1, and the rotating body 5 is rotated clockwise. Then, as the rotary body 5 rotates clockwise, the drive side link 11 also interlocks and rotates clockwise, so that the boarding / alighting step 23 is extended from the vehicle side surface 24.

On the contrary, at the time of manual storage, the tire wheel fixing nut attaching / detaching wrench 16 mounted on the vehicle is attached to the nut 2a.
1 and 8, the rotary shaft 1 for power transmission coaxial with the manual operation shaft 2 is rotated clockwise by rotating the shaft 1 clockwise in FIGS. Then, the step operation mechanism 41 is moved from the output gear 4 fixedly mounted on the power transmission rotary shaft 1.
Is input to rotate the rotating body 5 counterclockwise. Then, the drive side link 11 also interlocks with the rotation of the rotating body 5 in the counterclockwise direction, and rotates in the counterclockwise direction, and the boarding / alighting step 23 is stored in the vehicle side surface 24.

On the other hand, the rotational force applied to the manual operation shaft 2 passes through the power transmission rotary shaft 1 and the step operation mechanism 4
At the same time as being input to 1, the speed reduction mechanism 43 is normally input, and the rotational force input to the speed reduction mechanism 43 reversely operates the speed reduction mechanism 43 to rotate the electric motor 15. If there is no means for releasing the connection between the transmission rotary shaft 1 and the reduction mechanism 43, the manually operated shaft 2
A great load is always added when rotating the.

However, the worm gear 3 of the reduction mechanism 43
1 and the rotary shaft 1 for power transmission, a torque limiter 3 is provided.
Is provided, and the rotational force applied to the manual operation shaft 2 is input to the rotary member 32 of the torque limiter 3 via the power transmission rotary shaft 1 that is coaxial with the manual operation shaft 2.
When the torque acting between the rotating member 32 and the worm gear 31 exceeds a predetermined value, the ball 33 engaged with the receiving hole 31a of the worm gear 31 is disengaged, and the rotating member 3
2 can rotate freely with respect to the worm gear 31. As a result, the manually operated shaft 2 is released from the load of the electric motor 15 and the speed reduction mechanism 43, and can be easily manually rotated with a comparatively small force to carry out the manual operation of storing or projecting the boarding step 23. become able to.

As described above, according to the electric stepping device with the manual storing mechanism of the present embodiment, the manual operating shaft 2 is provided coaxially and integrally with the power transmitting rotary shaft 1 for transmitting power to the step operating mechanism 41. Even if a problem occurs in the electric motor 15, the manual operation shaft 2 is rotated and power is transmitted to the step operation mechanism 41, so that the stepping on / off step 23
Can be stored and can be extended by rotating in the opposite direction.

Further, since the boarding / alighting step 23 swings in the horizontal plane and is projected and stored, it is fixed without moving in the vertical direction, and due to such structural characteristics. It becomes easy to fix in the extended state or the stored state. This is not only easy to handle the load at the time of using the step, but also easy to maintain the stored state even when vibration during running is applied. Since it is not necessary to support the weight of 23, it can be easily performed.

Further, in the present apparatus, since the boarding / alighting step 23 is held in either the retracted fixed state or the extended fixed state by the latch mechanism, it is possible to fix it in the extended state or the retracted state by such a structure. it can. In this device, the torque limiter 3 provided between the worm gear 31 of the reduction mechanism 43 and the power transmission rotary shaft 1 is
Since the torque transmission is cut off when the acting torque exceeds a predetermined value, the electric motor 1 becomes a large load during manual operation.
5, and the manual operation shaft 2 can be operated with a relatively small force.

Further, since the rotation operating portion 42 is provided with the nut 2a, it can be rotated very easily by the tire wheel fixing nut attaching / detaching wrench 16 mounted on the vehicle, and no special tool is required. Therefore, there is an advantage that anyone can easily operate it manually. It should be noted that the present invention is not limited to the above-described embodiment, and for example, the torque limiter can be configured separately from the worm gear, and the electric motor can be a step motor and the reduction mechanism can be omitted. Is. As described above, the present invention can be variously modified and implemented without departing from the scope of the present invention.

[0042]

As described above in detail, according to the electric step device with the manual retracting mechanism of the present invention as set forth in claim 1 , the rotary operation portion is provided on the rotary shaft for power transmission for transmitting power to the step for getting on and off. Therefore, even if you cannot drive the step for getting on / off electrically because of a problem with the electric motor, you can store the step for getting on / off by manually rotating the rotation operation unit and applying a rotational force to the rotary shaft for power transmission. There is an advantage that it can be done and overhanged. Also, the torque limiter
When the torque applied by exceeds the specified value, the torque transmission is cut off.
The power transmission rotary shaft is a load
The rotary operation part with a relatively small force.
There is an advantage that

According to the electric stepping device with a manual retracting mechanism of the present invention , the power is transmitted to the step for getting on and off.
A rotary operation unit is provided coaxially with the rotating shaft for power transmission to reach
As a result, there is a problem with the electric motor,
Even if you can not drive the table electrically
To apply a rotational force to the power transmission rotary shaft.
To store and extend steps for getting on and off
There are advantages. In addition, the tire operation wheel is
A nut that is compatible with the wrench
Therefore, the tire wheel fixing nut mounted on the vehicle
It can be operated with a detachable wrench and requires special tools.
It is easy to operate without doing. According to the electric step device with the manual retracting mechanism of the present invention described in claim 3, the torque
If the torque applied by the limiter exceeds a specified value, the torque transmission
The power transmission rotary shaft is a load
It is released from the motor and the rotary operation part is operated with a comparatively small force.
There is an advantage that can be made.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric step device with a manual storage mechanism as an embodiment of the present invention.

FIG. 2 is a perspective view illustrating an installation position of an electric step device with a manual storage mechanism according to an embodiment of the present invention.

FIG. 3 is a side view of a main part of an electric step device with a manual storage mechanism according to an embodiment of the present invention.

FIG. 4 is a schematic plan view showing a state of the electric step device with the manual retracting mechanism according to the embodiment of the present invention when the step step for getting on and off is stored.

FIG. 5 is a schematic plan view showing a state of the electric step device with the manual retracting mechanism as one embodiment of the present invention when the step step for boarding / alighting is extended.

FIG. 6 is a diagram showing the configuration of a step operation mechanism of an electric step device with a manual storage mechanism according to an embodiment of the present invention.
FIG.

FIG. 7 is a schematic cross-sectional view (corresponding to AA cross section in FIG. 1) showing a configuration of a torque limiter according to an electric step device with a manual retracting mechanism as an embodiment of the present invention.

FIG. 8 is a perspective view showing an electric step device with a manual storage mechanism as an embodiment of the present invention.

[Explanation of symbols]

1 Power transmission rotary shaft 2 Manual operation axis 2a nut 3 Torque limiter 10-step operation axis 11 Drive side link 15 Electric motor 23 Steps for getting on and off 41 step operation mechanism 42 Rotation operation part 43 Reduction mechanism

Claims (3)

(57) [Claims] 1. A movable step for getting on and off arranged below a door opening of a vehicle, an electric motor for driving the step between a retracted fixed state and a retracted fixed state, and the electric motor. And a rotation shaft for power transmission interposed between the step and the step side, and the rotation shaft for power transmission is manually rotated from the outside so that the step is in the storage fixed state and the extension fixed state. Is provided with a rotary operation part that can be manually driven, and the rotary shaft for power transmission and the rotary shaft on the electric motor side are mutually connected.
The mechanical transmission of the rotation between them according to the input torque.
An electric step device with a manual retracting mechanism, which is provided with a torque limiter for shutting off the power . 2. A movable member disposed below a door opening of a vehicle.
Dynamic stepping on / off and driving the step between the retracted fixed state and the retracted fixed state
And an electric motor for operating the power transmission interposed between the electric motor and the step side.
The rotary shaft for power transmission, and the rotary shaft for power transmission is manually rotated from the outside.
Therefore, a rotary operation unit capable of manually driving the step is provided.
The vehicle's tire wheel fixing nuts can be
Nut or bolt corresponding to the wrench for power transmission
A hand characterized by being fixed concentrically with the rotation axis.
Electric step device with dynamic storage mechanism. 3. The rotating shaft for power transmission and the side rotation of the electric motor
Rotation between the rolling axis and each other according to the input torque
A torque limiter that cuts off the transmission of
An electric chair with a manual storage mechanism according to claim 2, characterized in that
Tep equipment.