JPS6221647Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a device that electrically opens and closes the doors of vehicles such as buses, and in an emergency, the drive transmission path is cut off so that the vehicle doors can be opened and closed manually. This invention relates to a vehicle door opening/closing device that allows the opening/closing angle of the door to be adjusted extremely easily.

Conventionally, such a vehicle door opening/closing device has a worm gear on a rotating shaft connected to a drive shaft of a drive motor, and meshes with the worm gear, as shown in Patent Application Publication No. 53919 of 1982, for example. An output rod connected to a door opening/closing link etc. is configured to rotate through a worm wheel and a large gear that meshes with a small gear formed integrally with the worm wheel, while the drive shaft and The joint portion of the rotating shaft is made slidable, and both end faces of the worm gear are pressed by disc springs or the like to keep the rotating shaft stationary at a fixed position, and the rotating shaft is driven by sliding. A mechanism that forms a dog that presses a limit switch to stop the rotation of the motor, and a rotating arm whose tip is pressed in the circumferential direction by a compressed coil spring or the like on a support shaft that supports the large gear. A circle and a square circumscribe the camshaft, which is rotatably supported by the main body and which is rotatably supported by the main body at the tip of the arm. forming a hole with a composite shape,
A mechanism is known in which one end of a torsion coil spring is locked to the flat surface of the camshaft, but in such a mechanism, it is possible to simplify the mechanism by minimizing the number of gears. At the same time, the entire device can be designed very compactly, and since one end of the torsion coil spring is locked to the flat part of the camshaft, the rotation of the camshaft allows the worm wheel to be Automatically open the door by engaging and disengaging the worm gear.
Even if it is possible to easily switch between manual opening and closing, the cam attached to the upper end of the spindle presses the limit switch at the end of the door opening/closing operation, making the drive motor's power circuit open. Therefore, if this configuration is used to adjust the opening/closing angle of the door, the adjustment of the opening/closing angle of the door can be done by tightening a relatively large diameter shaft such as the output shaft (support shaft) that is the main part of the opening/closing device. Relaxation has to be performed, which requires extremely labor and has disadvantages such as difficulty in fine adjustment.

In view of these drawbacks, the present invention uses a simple clutch mechanism to facilitate manual switching operations, and also provides a separate camshaft without using the output shaft, and a short lever with one end fixed to the camshaft. The structure is such that it is connected to the lower end of the output shaft via a lever, so that the vehicle door can be opened and closed easily by manual operation in an emergency, and the opening and closing angle of the door can be adjusted extremely easily. In an attempt to solve the above-mentioned drawbacks, an example of the implementation of the present invention will be described below based on the drawings. 1 is a main body of a vehicle door opening/closing device, and the left side of a base 2 forming the base thereof. A gearbox 3 is attached to the upper right end of the gearbox 3, and a drive motor 4 capable of rotating in both forward and reverse directions is attached to the upper right end of the gearbox 3, and its drive shaft 5 protrudes into the gearbox 3. It is rotatably supported on the top and can be moved back and forth, and a worm gear 6 is installed in the center.
The operating shaft 7 and the drive shaft 5 of the drive motor 4 are connected to each other in a semicircular manner so that the operating shaft 7 and the drive shaft 5 of the drive motor 4 are connected to each other so as to be slidable in the axial direction. Coil springs 10, 10' are press-fitted between the bearings 9 and between the rear end face bearings 9' of the worm gear 6 to keep the worm gear 6 stationary at a fixed position.

Further, in a direction perpendicular to the operating shaft 7, a rotary shaft 13 having a worm wheel 11 meshing with the worm gear 6 and another worm gear 12 is rotatably supported by the gear box 3.

Reference numeral 14 denotes an output shaft vertically disposed to the left of the rotating shaft 13 so that it can rotate and move up and down.A worm wheel 15 that meshes with the worm gear 12 of the rotating shaft 13 is mounted approximately in the center of the output shaft 14. A clutch 17 is integrally fixed to the upper surface of the worm wheel 15, and a triangular ridge-shaped fitting tooth 16 is formed radially on a flat surface. Synthetic teeth 1
A clutch 19 formed in the same manner as 8 is fitted and fixed to the output shaft 14 so as to face each other.

Further, a support cylinder 20 is provided on the upper part of the output shaft 14, and a groove 21 is provided on the outer periphery of the upper end of the output shaft 14.
A pin 22 that fits into the groove 21 is inserted from the outside of the support tube 20 to integrate the output shaft 14 with the support tube 20 in a rotatable state, and a pin 22 that is fitted into the groove 21 is attached to the support tube 20 in a rotatable manner. A slide cam 24 having a shaped guide groove 23 formed therethrough is inserted and fixed to the gear box 3, and a guide pin 25 to be fitted into the guide groove 23 is protruded from a predetermined position on the outer periphery of the support cylinder 20. Seshime, support tube 2
As the guide pin 25 moves along the trajectory of the guide groove 23 by the rotation of 0, the output shaft 14 is moved up and down, and the clutch 19 is engaged with and disengaged from the clutch 17.

A locking plate 27 having a locking projection 26 protruding from one end is fitted and fixed to the outer periphery of the upper part of the support cylinder 20. When the output shaft 14 rotates, a locking rod 28 facing both sides of the locking projection 26 is pivotally attached to the gear box 3. A tension coil spring 31 is hooked between the tip of the locking rod 28 and a locking piece 30 protruding from a cover 29 of the gear box 3, and the locking rod 28 is pressed against the locking plate 27. When the support cylinder 20 is at both rotational ends, i.e., when the guide pin 25 is at point P or point Q of the guide groove 23, the locking rod 28 pulls both sides of the locking projection 26 of the locking plate 27 against the tension coil spring 31.
The output shaft 14 is pressed by the pulling force of
is configured to be fixed at both ends.

Note that 32 in the figure is a switching lever attached to the upper end of the support tube 20.

In addition, in order to rotate the support tube 20 by remote control, one end of a covered tube 35 containing a wire rope 34 is fixed to the lid body 29, and one end of the locking plate 27 is fixed by extending the tip of the wire rope 34. It is latched onto a bent latching piece 36, and the support tube 20 can be rotated by pushing and pulling the wire rope 34.

37 is a switch lever that interlocks with the drive shaft 5, 38 and 38' are LS dogs, and 39 and 39' are LS
This is a limit switch operated by dogs 38, 38'.

Reference numeral 40 denotes an arm rod fixed to the lower end of the output shaft 14, and a small through hole 41 is formed through one end of the arm rod 40.

Reference numeral 42 designates a long lever having a protrusion 43 at its end that fits into the through hole 41. A short lever 44 in an upright shape is pivotally supported at the other end of the long lever 42 by a pin 45. The other end is connected to the cam 46,4
6'... is fixed to the lower end of the cam shaft 47.

Incidentally, 48, 48', . . . are limit switches arranged opposite to the cams 46, 46', .

Next, the operation of the vehicle door opening/closing device according to the present invention will be explained. First, in the case of automatic opening/closing by the drive motor 4, the switching lever 32 is rotated to engage the clutches 17 and 19.

When the drive motor 4 is rotated from this state, the rotation is decelerated and transmitted to the rotating shaft 13 by the meshing of the worm gear 6 and the worm wheel 11, and is further transmitted to the rotating shaft 13 by the worm gear 12 and the worm wheel 1.
5 and the clutch 17 and the clutch 19, the deceleration is transmitted to the output shaft 14, so the arm rod 40 attached to the lower end of the output shaft 14 rotates and the door is opened via a link etc. connected to the arm rod 40. can be opened and closed automatically.

Worm wheel 1 at the end of the door opening/closing operation
Since rotation is not transmitted from the worm gears 1 and 15 to the worm gears 6 and 12, the door can be locked in the fully open or fully closed state, and safety is ensured when the vehicle is running in the fully closed state.

Furthermore, if an obstacle such as a person or object is caught when opening or closing the door, the load on the output shaft 14 becomes large and the output shaft 14 stops.
Since the drive motor 4 tries to continue rotating,
An operating shaft 7 supporting the worm gear 6 slides in the axial direction.

At that time, the LS dock 38 is moved by sliding of the operating shaft 7.
Alternatively, the power supply circuit 38' can press the limit switch 39 or 39' to open the power circuit of the drive motor 4, thereby protecting the drive motor 4 and obstacles such as people and objects.

Furthermore, in order to manually open and close the door in an emergency, the arm rod 40 can be freely rotated by disengaging the clutches 17 and 19.

Conversely, when switching from manual to automatic, the switching lever 32 is rotated in the opposite direction, and the clutches 17 and 19 are engaged, resulting in the automatic state.

In addition, upon such switching, clutch 17 and clutch 1
Since the clutches 9 mesh with each other through the triangular ridge-shaped fitting teeth 16 and 18, the clutches 17 and 19 can be easily engaged regardless of the position of the output shaft 14.

In addition, to switch between manual and automatic mode by remote control, push and pull the wire rope 34 to rotate the support tube 20 via the locking plate 27, and perform the same operation as with the switching lever 32. It is possible.

The opening/closing angle of the door can be adjusted using a cam 4 connected to the arm lever 40 so that the arm lever 40 rotates to open and close the door.
6, 46'... rotates and the limit switch 48,
48'... is activated.

In short, the present invention provides a worm gear 6 coaxially with a drive shaft 5 rotated by a motor for rotation in both forward and reverse directions, and meshes with a worm wheel 11.
An output shaft 1 is vertically disposed vertically movably on a worm gear 12 provided coaxially with the worm wheel 11.
Since the worm wheel 15 is engaged with the clutch 17 which is fitted into the clutch 17 and can be freely engaged with the clutch 19 which is fitted into the output shaft 14 and is fixed to the output shaft 14, the switching lever 3 can be automatically opened and closed by the drive motor 4.
2, the clutch 17 and the clutch 19 are engaged, and the worm gear 6 and the worm wheel 11 are engaged, and the worm gear 12 and the worm wheel 15 are engaged, and the clutch 17 and the clutch 19 are engaged, whereby the power is transmitted to the output shaft 14. The door opens and closes automatically, and since the rotation is not transmitted from the worm wheels 11, 15 to the worm gears 6, 12 when the door opens and closes, the door can be locked in the fully open or fully closed state, and the door can be locked in the fully closed state. Clutch 17 and clutch 1 are used to ensure safety when driving the vehicle, and to manually open and close the door during use.
By disengaging the clutch 9, the arm rod 40 can be freely rotated. Conversely, to switch from manual to automatic, the clutch 17 can be rotated by rotating the switching lever 32 in the opposite direction.
The clutch 19 is engaged and becomes automatic.

On the other hand, an arm rod 4 fixed to the lower end of the output shaft 14
A long lever 4 having a small through hole 41 penetrated through one end of the lever 4 and a projection 43 inserted into the through hole 41.
A short lever 44 is pivotally supported on the other end of the camshaft 47, and one end of the short lever 44 is fixed to the lower end of a camshaft 47, and cams 46, 46' are provided at the upper end of the camshaft 47, and the cams 46, 46 Since the limit switches 48, 48'... are arranged opposite to each other, the opening/closing angle can be adjusted using a separate dedicated camshaft 47 without loosening the tightening of a relatively large diameter shaft like the output shaft 14. The camshaft 47 not only makes it possible to make minute adjustments extremely easily, but also
Its practical effects are enormous, such as the ability to install a cam on top and add corresponding limit switches 48, 48', etc. with great ease.

[Brief explanation of the drawing]

The figure shows an example of the implementation of the present invention.
The figure is a plan view of a vehicle door opening/closing device according to the present invention.
2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a sectional view taken along the line BB in FIG. 2, and FIGS. 4 and 5 are front views showing the operating state of the clutch portion. 4... Drive motor, 14... Output shaft, 15...
... Worm wheel, 16, 18 ... Fitting teeth, 1
7,19...Clutch, 40...Armbar, 42...
Long lever, 43... protrusion, 44... short lever, 4
6,46'...cam, 47...camshaft, 48,4
8'...Limit switch.

Claims (1)

[Scope of utility model registration request] A worm gear is provided on the same axis of a drive shaft rotated by a motor for rotation in both forward and reverse directions and meshed with the worm wheel, and an output shaft is vertically movable up and down on the worm gear provided on the same axis of the worm wheel. a worm wheel having a clutch fitted into the output shaft and capable of engaging with a clutch fixed to the output shaft, and a small through hole penetrated through one end of an arm rod fixed to the lower end of the output shaft; A short lever is pivotally supported on the other end of the long lever that has a protrusion that fits into the through hole, the other end of the short lever is fixed to the lower end of the camshaft, and a cam is provided on the upper end of the camshaft. A vehicle door opening/closing device characterized in that a limit switch is provided opposite to the cam.