JPH0743416Y2 - Door opening / closing device for vehicle - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial field of application The present invention prevents the door from being closed too tightly and prevents the worm gear from being caught in the gear box. The present invention relates to a vehicle door opening / closing device.

2. Description of the Related Art Conventionally, various opening and closing devices for vehicle doors have been improved as shown in Japanese Patent Application Laid-Open No. 107674 in 1988. Even in such improvements, drive motors, worm gears, spur gears, arms and links are connected. Since the driving force is transmitted to the driving motor, the driving motor does not stop immediately even if the door is closed (the signal of the micro switch is OF
(It stops when it reaches F), and the door closing speed collides at the same speed even before closing, and it stops, which has the drawback of closing the door more tightly than necessary, and when the worm gear is tightened tightly. (When the door is closed) It will not reverse unless an excessive amount of current is applied compared to normal rotation, so a large capacity relay or power transistor etc. is required for the control circuit,
It had the drawback of being expensive.

It should be noted that this phenomenon of worm gears is very similar to the more torque required to loosen a bolt when it is tightened.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the present invention, a spring and an elastic body are attached to the arm collar and the output rod, and when the arm collar and the output rod are stopped, the spring and the elastic body are expanded and contracted and deformed to balance each other.
While preventing the door from closing too tightly,
Prevents the worm gear from being caught in the gear box and also prevents the worm gear from being caught, thus eliminating the need for large-capacity relays or power transistors, which were conventionally required for the control circuit during reverse rotation, and making the control circuit inexpensive. It is intended to provide a vehicle door opening / closing device configured as described above.

[Constitution of device]

Means for Solving the Problems In view of the above points, the present invention includes a drive motor that can rotate in both forward and reverse directions, a gear box that reduces speed, an output shaft that projects from the gear box, and an output rod that is mounted on the output shaft. In the vehicle door opening / closing device, the arm collar is fixed to the output shaft, an output rod is attached to the arm collar so as to be rotatable by an appropriate angle, and an elastic body is attached between the arm collar and the output rod. In addition to transmitting the turning force of the output shaft to the output rod via the elastic body, the output rod is stopped to rotate below the above-mentioned angle, and the arm collar and the center swing of the output rod at the respective positions. An elastic body is mounted between the arm collar and the output rod so that the turning force in both directions of the output shaft is transmitted to the output rod through the elastic body, and the output rod stops rotating below the angle in both directions. Opening and closing the vehicle door The above problems are not solved by providing a device.

The present invention is that the rotating power of the drive motor is reduced by the gear box and transmitted to the output shaft, and when the arm collar rotates, the output rod connected by the spring rotates and the door moves, and when the door closes, the output rod moves. And the link does not rotate any more, and at this time the arm collar tries to rotate, but since the output rod is stopped, the arm collar stops at the position where the spring stretches and balances, and the worm gear is not caught. is there.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a main body of an opening / closing device for a vehicle door, and a drive motor 3 is provided on a left side portion of a case cover 2 thereof and is rotatable in both forward and reverse directions.
And a gear box 4 for decelerating the rotational power at the right end of the drive motor 3 and an output shaft 5 protruding at the upper end of the gear box 4 and an output rod 6 connected to the output shaft 5. At the same time, the output rod 6 has a link 7 fixed to the tip thereof, which is linked to the door.

An arm collar 8 is fixed to the upper end of the output shaft 5 with a key 9, and a groove 10 having a predetermined width for setting the output shaft 5 is formed in the upper portion of the arm collar 8 and side walls on both sides of the groove 10.
Turning shafts 11 and 11a are formed with turning grooves 12 and 12a so that the output shaft 5 is
It is designed so that it can be rotated once.

A collar 13 is mounted on the upper end of the output shaft 5
A connecting hole 14 of the output rod 6 is externally fitted to the shaft 13 with a bush 15 interposed therebetween, and plate washers 16, 16a, bolts 1
I'm wearing 7.

Reference numeral 18 denotes a spring pin projectingly provided on the outer peripheral side wall of the arm collar 8. On the other hand, a fitting hole 19 is provided at an eccentric middle part of the output rod 6, and a spring pin 20 is press-fitted into the fitting hole 19 to form an arm. A spring 21 (elastic body) is mounted between the spring pin 18 of the collar 8 and the spring pin 20 of the output rod 6.

The output rod 6 is rotatable by 14 degrees, but the strength of the spring 21 is selected so as to be balanced at about 10 degrees.
A spring 21 is attached to the output rod 6, but instead of the spring 21, an elastic body such as a leaf spring, a compression coil spring, a tension coil spring, or rubber may be used to obtain a damper effect.

Reference numeral 22 is a connection hole with the link 7 which is formed at the tip of the output rod 6.

Further, as shown in FIG. 5, a U-shaped elastic body 23 is externally fitted to the arm collar 8 so that the tip ends contact both sides of the output rod 6,
That is, at the respective positions of the arm collar 8 and the center swing of the output rod 6, between the arm collar 8 and the output rod 6, the elastic body is arranged so as to be able to transmit the turning force of the output shaft 5 in both directions to the output rod 6. 23 may be attached to each to generate a damper effect in both rotation directions of the output rod 6.

In addition, although not shown in the drawing, the lower part of the switchgear body 1 is automatically
A manual switching lever is installed.

Next, the operation of the vehicle door opening and closing device according to the present invention will be described. In the case of automatic opening and closing, the rotational force of the drive motor 3 is reduced by the gear box 4 and transmitted to the output shaft 5, and the arm collar 8 rotates. Then, the output rod 6 connected by the spring 21 rotates (the spring 21 hardly extends) and the door moves, and when the door is closed, the output rod 6 and the link 7 do not rotate any more, and at this time, the arm collar 8 However, since the output rod 6 is stopped, the arm collar 8 stops at a position where the spring 21 extends and balances, and the worm gear is not caught.

The positions of the arm collar 8, the spring 21, and the output rod 6 are as shown in FIG. 2. In the state of the solid line, the arm collar 8 rotates, the spring 21 hardly expands, and the output rod 6 rotates. In the state of the phantom line, the spring 21 extends after the rotation of the output rod 6 is stopped, and the arm collar 8 stops rotating at a position where the reaction force of the spring 21 and the rotational force of the arm collar 8 are balanced. The spring pin 18, which is the base end of the spring 21, moves, and the spring 21 extends.

Further, if elastic bodies 23 for transmitting turning forces of the arm collar 8 in both directions are attached to both sides of the output rod 6 in the rotation direction, the elastic force is generated by the rotation of the arm collar 8 after the rotation of the output rod 6 in both directions is stopped. The body 23 is deformed, and at the position where the drag force of the elastic body 23 and the turning force of the arm collar 8 are balanced, the arm collar 8
Stops rotating, and the damper effect occurs when the door is opened and closed.

[Effect of device]

In short, the present invention is for a vehicle that includes a drive motor-3 that can rotate in both forward and reverse directions, a gear box 4 that decelerates, an output shaft 5 that projects from the gear box 4, and an output rod 6 that is mounted on the output shaft 5. In a door opening / closing device, an arm collar 8 is fixed to an output shaft 5, an output rod 6 is attached to the arm collar 8 so as to be rotatable by an appropriate angle, and an elastic body (spring) is provided between the arm collar 8 and the output rod 6. 21) is mounted, the rotational force of the output shaft 5 is transmitted to the output frame 6 through the elastic body (spring 21), and the output rod 6 is stopped to rotate below the above-mentioned angle. 8 and the output rod 6 stop rotating, the elastic body (spring 21) extends to balance the turning force of the arm collar 8 and the drag force of the spring 21, and
The extension of 21 produces a damper effect, and the output rod 6 stops without coming into contact with or colliding with the turning limit ends of the turning grooves 12, 12a formed in the side walls 11, 11a of the arm collar 8. Of the worm gear in the gear box 4 is prevented from being closed more than necessary, and the biting of the worm gear is also prevented. The control circuit can be made inexpensive by eliminating the relay or the power transistor of the present invention, and the damper effect makes it possible to approach a smooth movement like an air cylinder, and the door side, the opening / closing device body 1
Both sides are comfortable and the durability can be improved.

Further, elastic bodies 23 are respectively mounted between the arm collar 8 and the output rod 6 at the respective positions of the central swing of the arm collar 8 and the output rod 6, and the elastic bodies 23 are mounted in the two directions of the output shaft 5 via the elastic bodies 23. Since the turning force is transmitted to the output rod 6 and the output rod 6 stops rotating at less than the above-mentioned angles in both directions, the elastic body 23 deforms and the arm collar 8 and the output rod 6 balance each other to open and close. The damper effect can be generated, which is a great practical effect.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of a switchgear body, FIG. 2 is a plan view of an output portion, FIG. 3 is a sectional view taken along line AA of FIG. FIG. 5 is a plan view of the arm collar, and FIG. 5 is a perspective view of the second embodiment. 1 switchgear body, 3 drive motors-4 gear box, 5 output shafts, 6 output rods, 8 arm collars, 10 grooves, 12 and 12a rotation grooves 21 springs, 23 elastic bodies

Claims (2)

[Scope of utility model registration request] Claim: What is claimed is: 1. A vehicle door opening / closing device comprising a drive motor rotatable in both forward and backward directions, a gear box for decelerating, an output shaft protruding from the gear box, and an output rod mounted on the output shaft. An arm collar is fixed to the shaft, an output rod is attached to the arm collar so as to be rotatable by an appropriate angle, and an elastic body is attached between the arm collar and the output rod. Is transmitted to the output rod, and the output rod is stopped to rotate below the angle described above. 2. An elastic body is mounted between the arm collar and the output rod at respective positions of the arm collar and the center swing of the output rod, and the rotational force in both directions of the output shaft is output through the elastic body. 2. The vehicle door opening / closing device according to claim 1, wherein the output rod is rotated and stopped below the angle in both directions while being transmitted to the rod.