192 clutches and power-stop control – Stop mechanism – Limit stop
Reexamination Certificate
2002-08-07
2004-02-10
Lorence, Richard M. (Department: 3681)
192 clutches and power-stop control
Stop mechanism
Limit stop
C160S133000, C160S310000
Reexamination Certificate
active
06688447
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an improved electrical rolling door transmission, especially the one that facilitates the maintenance and assemblage.
BACKGROUND OF THE INVENTION
Please refer to FIG.
1
. Traditional electrical rolling door transmission is known for its small size, small installation space and fast rolling-up capability. The door controller
1
′ fixed inside the FixDisc
2
′ with one pair of transmission gears
11
′ and two cams
12
′,
13
′ (as shown in
FIG. 2
) is the controlling mechanism for the rolling door to adjust the rolling-up position of the frame board. The two cams
12
′,
13
′ hit against the antenna
71
′ of the limiting position switch
7
′ during revolving that controls the limiting position of the frame board for the ascending and descending rolling door.
Please refer to FIG.
3
. The two cams
12
′,
13
′ are installed on the transmission gear wheel
11
′ with a cover
14
′ locked on it to block and fix the two cams
12
′,
13
′, allowing them to adjust and revolve on the axis of the transmission gearwheel
11
′ to the limiting position of the ascending and descending door. With the friction against the side of the cover
14
′, the two cams
12
′,
13
′ are fixed and able to revolve along with the axis of the transmission gearwheel
11
′. Therefore, after manually adjusting the limiting position of the two cams
12
′,
13
′, the cover
14
′ mus be relocked up so as to increase the friction of the contact area to keep the limiting position fixed and steady.
However, such positioning leaves quite small space between the FixDisc
2
′ and the wall, which prevents the locking tools from going through easily during assemblage or maintenance, thus hardens and disturbs the locking task and increases the assemblage or maintenance time. Moreover, the two cams
12
′,
13
′ positioned by rubbing against each other might change the limiting position of the two cams
12
′,
13
′ and results in inaccuracy during revolving when the locking screws loose up. As such, the necessity of improvement exists for the appropriateness of the traditional electrical rolling door transmission.
Besides, the assemblage of the clutch
6
′ for the traditional electrical rolling door transmission shown in
FIG. 4
contains an adjustable inserting shaft
61
′ that inserts into the socket
211
′ of the clutch disc
21
′ to fix it onto the FixDisc
2
′, allowing the driving motor
4
′ to revolve on the clutch disc
21
′ epicyclically. In case of a power failure, the inserting shaft
61
′ of the clutch
6
′ is drawn back from the socket
211
′ of the clutch disc
21
′ to release the clutch disc
21
′ and revolve with the wheel
3
′. Meanwhile, the driving motor
4
′ and the clutch disc
21
′ become a linked mechanism, allowing the wheel
3
′ to spin on the reel, enable the user to open and close the rolling door easily and rapidly.
The socket
211
′ by which the inserting shaft
61
′ of the above clutch
6
′ is inserted and the inserting shaft
61
′ make a pair; therefore, to re-insert the inserting shaft
61
′, the socket
211
′ of the clutch disc
21
′ must be repositioned to correspond to the inserting shaft
61
′ and allow it to get stuck automatically. Because the correspondence of the single socket
211
′ by revolving is difficult to implement and any damage to the socket
211
′ requires a replacement of the entire clutch disc
21
′, which is a waste of money and an increase of maintenance and assemblage time, as such, the single socket design of the clutch
6
′ for the electrical rolling door transmission is a burden for operation and conflicts with economic benefits.
Please refer to
FIG. 5
for the assemblage of the driving motor of traditional electrical rolling door transmission. The driving motor is fixed onto the wheel
3
′ of the rolling-up frame board. With the clench between the gearwheel on the reel of the wheel and the inner ring gearwheel of the clutch disc
21
′ of the FixDisc
2
′, the driving motor
4
′ is able to revolve on the clutch disc
21
′ epicyclically, driving the wheel
3
′ to revolve. Besides, when the driving motor
4
′ is fixed onto the wheel
3
′, the limited space between the clutch disc
21
′ and the wheel
3
′ restricts the screw
5
′ to be bolted outwardly to the driving motor
4
′ from between the clutch disc
21
′ and the wheel
3
′ and fixes the driving motor
4
′ onto the wheel
3
′. During the maintenance or renewal, however, the whole wheel
3
′ must be dismantled before taking off the driving motor
4
′, causing great inconvenience in maintenance and assemblage as well as a waste of manpower.
SUMMARY OF THE INVENTION
The main objective of the present invention is to provide an improved electrical rolling door transmission, in which the two cams of the door controller are designed as the inner gearwheel and the outer gearwheel clenching against each other for adjustment, rather than through the traditional positioning by friction. Thus, even in such small space for the maintenance, the mechanism can be adjusted manually with the user's fingers. The clench positioning of the adjusted gearwheel keeps the limiting position of the two cams steady, thus facilitates the adjustment and maintenance of the rolling-up position of the frame board.
Another objective of this present invention is to eliminate the time of waiting for reposition after revolving for a big circle by providing several sockets on the clutch disc that allow the inserting shaft of the clutch to be positioned randomly into any of the socket, contributing to the operation of reposition What's more, in case of any damaged socket, it is not necessary to replace the whole clutch disc as other sockets are available, thus provides more economic benefits in maintenance.
Another objective for the present invention is that, by installing a positioning board between the driving motor and the wheel for the screws to be fastened on the wheel directly through the positioning board and bolting the screw with the locking board of the driving motor with screw nuts, the user can dismantle the driving motor directly without the necessity of detaching the wheel, thus makes the operation more easily and convenient.
In the following, the embodiment illustrated is used to describe the detailed structural characteristics and operation action for the present invention.
REFERENCES:
patent: 4342354 (1982-08-01), Leivenzon et al.
patent: 4372367 (1983-02-01), Baldanello et al.
patent: 4706727 (1987-11-01), Leivenzon et al.
patent: 5887693 (1999-03-01), Hsu
patent: 5924949 (1999-07-01), Fan
Lorence Richard M.
Troxell Law Office PLLC
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