TWM656379U - Rolling door brake device - Google Patents

Abstract

This invention relates to a rolling door brake device, including: a first brake disc, a manual mechanism and a clutch mechanism. The first brake disc is rotatably connected to a rolling door drive shaft; the manual mechanism includes a transmission shaft, a chain plate and a chain wound around the chain plate; the clutch mechanism is arranged between the first brake disc and the manual mechanism, and the clutch mechanism includes a base sleeved on the transmission shaft, a second brake disc, a metal coil, a first abutment, a second abutment, a first elastic member and a second elastic member, and the second brake disc faces the first brake disc. The metal coil can drive the second brake disc to move along the transmission shaft, and the second abutment is rotationally linked to the transmission shaft. The first elastic member is sleeved between the second abutment and the base and can interfere with the first abutment in a rotation direction. The second elastic member elastically abuts between the first abutment and the second abutment so that the first abutment has a tendency to move toward one side away from the second abutment.

Description

Rolling door brake device

This invention is related to rolling door machines, and in particular to a rolling door brake device.

The conventional electric rolling door includes a manual rolling door mechanism (such as a hand zipper), a motor drive mechanism and a brake mechanism. When the motor drive mechanism is in a power supply state, the brake mechanism disconnects the motor drive mechanism from the manual rolling door mechanism and does not connect; when the motor drive mechanism is in a power-off state, the brake mechanism connects the motor drive mechanism with the manual rolling door mechanism, thereby stopping the door and driving the door plate to rise and fall by manual operation, ensuring safety in use.

However, at the moment when the motor drive mechanism is powered off, a drive shaft of the motor drive mechanism still has rotational inertia, thereby driving a manual chain of the manual rolling door mechanism to rotate, which in turn causes the hand chain to be pulled and produce strange noises, and easily causes the hand chain to be deformed, stuck or damaged. In addition, the brake plate of the conventional brake mechanism is supported by multiple eccentrically arranged brake springs, resulting in increased resistance when operating the hand chain when the power is off, which is time-consuming and labor-intensive, and has shortcomings that need to be improved urgently.

Therefore, it is necessary to provide a novel and advanced rolling door brake device to solve the above-mentioned problems.

The main purpose of this invention is to provide a rolling door brake device that can reduce abnormal noise, reduce the resistance when operating the hand pull chain and avoid damage to parts.

To achieve the above-mentioned purpose, the present invention provides a rolling door brake device, including: a first brake disc, a manual mechanism and a clutch mechanism. The first brake disc is rotatably connected to a rolling door drive shaft; the manual mechanism includes a transmission shaft, a chain plate and a chain wound around the chain plate, and the chain plate is rotatably connected to the transmission shaft; the clutch mechanism is arranged between the first brake disc and the manual mechanism, and the clutch mechanism includes a base set on the transmission shaft, a second brake disc, a metal coil, a first abutment, a second abutment, a first elastic member and a second elastic member, the second brake disc faces the first brake disc and is rotatably connected to the first abutment, and the metal coil can drive the second The brake disc moves along the transmission shaft, the second abutment is rotationally linked with the transmission shaft, the first elastic member is sleeved between the second abutment and the base and can interfere with the first abutment in a rotation direction, the second elastic member elastically abuts between the first abutment and the second abutment so that the first abutment has a tendency to move toward one side away from the second abutment; wherein, when the metal coil is powered off, the second brake disc abuts against the first brake disc and drives the first abutment to rotate, and the first abutment pushes the first elastic member to elastically deform and press against the base.

The following is merely an example to illustrate possible implementations of the present invention, but it is not intended to limit the scope of protection for the present invention. The "one" or "at least one" preceding the terms mentioned in the text does not limit the quantity, and it can also be "plural" according to needs. This change in quantity is also within the scope of protection, which should be stated in advance.

Please refer to Figures 1 to 8, which show a preferred embodiment of the present invention. The rolling door brake device 1 of the present invention includes a first brake disc 10, a manual mechanism 20 and a clutch mechanism 30.

The first brake disc 10 is rotatably connected to a roller shutter drive shaft 2, for example but not limited to being connected to an output shaft of a motor; the manual mechanism 20 includes a transmission shaft 21, a chain plate 22 and a chain 23 wound around the chain plate 22, and the chain plate 22 is rotatably connected to the transmission shaft 21; the clutch mechanism 30 is disposed between the first brake disc 10 and the manual mechanism 20. The clutch mechanism 30 includes a base 31 sleeved on the transmission shaft 21, a second brake disc 32, a metal coil 33, a first abutment 34, a second abutment 35, a first elastic member 36 and a second elastic member 37. The second brake disc 32 faces the first brake disc 10 and is rotatably linked with the first abutment 34. The metal coil 33 can drive the second brake disc 32 to rotate. The brake disc 32 moves along the transmission shaft 21, the second abutment 35 is rotationally linked with the transmission shaft 21, the first elastic member 36 is sleeved between the second abutment 35 and the base 31 and can interfere with the first abutment 34 in a rotation direction; the second elastic member 37 elastically abuts between the first abutment 34 and the second abutment 35 so that the first abutment 34 has a rotational direction. The second brake disc 32 is in a state of moving away from one side of the second abutment member 35; wherein, when the metal coil 33 is powered off, the second brake disc 32 abuts against the first brake disc 10 and drives the first abutment member 34 to rotate (the rotational inertia of the rolling door drive shaft 2 drives the first brake disc 10 to rotate), and the first abutment member 34 pushes against the first elastic member 36 to elastically deform and abut against the base 31. Thus, the first elastic member 36 can deform to absorb the aforementioned rotational inertia and abut against the base 31, preventing the chain disc 22 from rotating and pulling the chain 23, thereby achieving the effect of reducing abnormal noise and avoiding damage to parts.

One of the second brake disc 32 and the first abutment member 34 is provided with at least one recess 341, and the other is provided with at least one protrusion 321. The at least one protrusion 321 is locked in the at least one recess 341 and can interfere and lock in the rotation direction, so that the second brake disc 32 can be rotationally linked with the first abutment member 34. The rolling door brake device 1 further includes a magnetic plate 40. The second brake disc 32 is provided with the at least one protrusion 321. The magnetic plate 40 is fixedly disposed on one side of the second brake disc 32 facing the metal coil 33 and is provided with at least one first through hole 41. The at least one protrusion 321 is penetrated through the at least one first through hole 41. In this embodiment, the second brake disc 32 includes two radially opposite protrusions 321, the first engaging member 34 includes two engaging recesses 341 corresponding to the two protrusions 321, and the magnetic plate 40 is provided with two first through holes 41, which has good clamping stability and can ensure uniform force and good force transmission effect, and is also convenient for replacing parts separately.

Specifically, the base 31 includes an inner ring wall 311 and an outer ring wall 312 disposed radially outward of the inner ring wall 311. The metal coil 33 is disposed between the inner ring wall 311 and the outer ring wall 312. The second abutment member 35 is disposed radially inward of the inner ring wall 311. The structure is simple and convenient for assembly and positioning. Preferably, the rolling door brake device 1 further includes a gasket 50 disposed between the magnetic plate 40 and the metal coil 33. The gasket 50 is provided with at least one second through hole 51. The at least one clamping protrusion 321 is disposed through the at least one second through hole 51 to prevent the magnetic plate 40 from directly colliding with and being damaged by the base 31.

The drive shaft 21 includes a non-circular section 211 and a circular section 212. The chain plate 22 and the second abutment member 35 are sleeved on the non-circular section 211 and can be rotationally linked with the drive shaft 21. The second brake plate 32 and the first abutment member 34 are sleeved on the circular section 212 and do not rotate synchronously with the drive shaft 21. In this embodiment, the non-circular section 211 includes at least one plane 213, which has a simple structure, is easy to process, and can stably limit rotation.

7 and 8 , the first abutting member 34 includes an abutting arm 342 , the second abutting member 35 includes an annular groove 351 and a sectional groove 352 extending parallel to the drive shaft 21 , the first elastic member 36 is accommodated in the annular groove 351 , the abutting arm 342 is movably accommodated in the sectional groove 352 and is located radially inward of the first elastic member 36 . In the present embodiment, the first elastic member 36 is a torsion spring; one end of the arm 342 is away from the second brake disc 32 and axially protrudes from the annular groove 351. When the metal coil 33 is powered off, the first brake disc 10 abuts against the second brake disc 32, and the rotational inertia of the rolling door drive shaft 2 drives the first abutting member 34 to rotate, so that the arm 342 can push against one end of the first elastic member 36 in the rotation direction to cause the first elastic member 36 to deform radially, as shown in FIG. 5 and FIG. 8, and then abut against the base 31 to absorb the rotational inertia and achieve the effect of instant braking, effectively preventing the chain 23 from being deformed by force.

6 , when the chain 23 is pulled in the power-off state, the chain plate 22 rotates to drive the drive shaft 21 and the second abutment 35. The second abutment 35 pushes against one end of the first elastic member 36 to cause the first elastic member 36 to deform radially (in this embodiment, it is radially contracted inward) without pressing against the base 31, thereby allowing the second abutment 35 to rotate smoothly relative to the base 31, which is beneficial for manually driving the door leaf to roll up.

In detail, the second elastic member 37 is a compression spring; the second engaging member 35 includes a receiving groove 353 and a limiting hole 354 connected to the receiving groove 353, the drive shaft 21 is inserted into the receiving groove 353 and the limiting hole 354, and the second elastic member 37 is sleeved on the drive shaft 21 and received in the receiving groove 353, which is convenient for assembly and can prevent the second elastic member 37 from tilting when deformed, so that the second brake disc 32 can be actuated more quickly and accurately. When the metal coil 33 is powered off, the second elastic member 37 elastically abuts the first abutting member 34 to make the second brake disc 32 abut against the first brake disc 10, thereby being able to rotate synchronously, as shown in FIGS. 5 and 6 , and the second elastic member 37 sleeved on the drive shaft 21 is beneficial to reducing the force applied to the chain plate 22, which helps to pull the chain 23 with less effort. A cross-sectional profile of the limiting hole 354 corresponds to a cross-sectional profile of the non-circular segment 211, so that the second abutting member 35 and the drive shaft 21 rotate synchronously. In other embodiments, the second engaging member and the chain plate may also be engaged with the drive shaft via concave-convex structures such as ratchets and keyways, and the synchronous rotation effect may also be achieved.

The manual mechanism 20 further includes a pull rod 24, which is biased to a side of the chain plate 22 away from the clutch mechanism 30. The pull rod 24 can drive the second brake disc 32 to move away from the first brake disc 10, so that the second brake disc 32 is separated from the first brake disc 10 when the power is off, and a rolling door connected to the rolling door drive shaft 2 can be lowered.

1: Rolling door brake device 2: Rolling door drive shaft 10: First brake disc 20: Manual mechanism 21: Drive shaft 211: Non-circular segment 212: Circular segment 213: Cutting plane 22: Chain plate 23: Chain 24: Pull rod 30: Clutch mechanism 31: Base 311: Inner ring wall 312: Outer ring wall 32: Second brake disc 321: Snap convex 33: Metal coil 34: First snap member 341: Snap concave 342: Snap arm 35: Second snap member 351: Ring groove 352: Split groove 353: Receiving groove 354: Limiting hole 36: First elastic member 37: Second elastic member 40: Magnetic plate 41: First perforation 50: Gasket 51: Second perforation

Figure 1 is a three-dimensional diagram of a preferred embodiment of the present invention. Figure 2 is a disassembled diagram of a preferred embodiment of the present invention. Figure 3 is a partial disassembled diagram of a preferred embodiment of the present invention. Figure 4 is a cross-sectional diagram of a preferred embodiment of the present invention in a powered-on state. Figure 5 is a partial cross-sectional diagram of a preferred embodiment of the present invention in a powered-off state. Figure 6 is a cross-sectional diagram of a preferred embodiment of the present invention when operating a chain in a powered-off state. Figures 7 and 8 are schematic diagrams of the operation of a first abutment, a second abutment, and a first elastic member of a preferred embodiment of the present invention.

1: Rolling door brake device

2: Rolling door drive shaft

10: First brake disc

20: Manual mechanism

24: Pull rod

30: Clutch mechanism

Claims (10)

A rolling door brake device comprises: a first brake disc, rotatably connected to a rolling door drive shaft; a manual mechanism, comprising a drive shaft, a chain plate and a chain wound around the chain plate, the chain plate being rotatably connected to the drive shaft; and A clutch mechanism is disposed between the first brake disc and the manual mechanism, comprising a base sleeved on the transmission shaft, a second brake disc, a metal coil, a first abutment, a second abutment, a first elastic member and a second elastic member. The second brake disc faces the first brake disc and is rotatably linked with the first abutment. The metal coil can drive the second brake disc. The disc moves along the transmission shaft, the second abutment is connected to the transmission shaft in rotation, the first elastic member is sleeved between the second abutment and the base and can interfere with the first abutment in a rotation direction, the second elastic member elastically abuts between the first abutment and the second abutment so that the first abutment has a tendency to move away from one side of the second abutment; Wherein, when the metal coil is powered off, the second brake disc abuts against the first brake disc and drives the first abutment to rotate, and the first abutment pushes the first elastic member to deform elastically and abut against the base. A rolling door brake device as described in claim 1, wherein one of the second brake disc and the first abutment member is provided with at least one recess and the other is provided with at least one protrusion, and the at least one protrusion is engaged with the at least one recess and can interfere and block each other in the rotation direction. The rolling door brake device as described in claim 2 further includes a magnetic plate, wherein the second brake disc is provided with the at least one latching protrusion, the magnetic plate is fixedly mounted on one side of the second brake disc facing the metal coil and is provided with at least one first through hole, and the at least one latching protrusion is penetrated through the at least one first through hole. A rolling door brake device as described in claim 2, wherein the second brake disc includes two radially opposite protrusions, and the first abutment member includes two recesses corresponding to the two protrusions. A rolling door brake device as described in claim 1, wherein the first abutting member includes a abutting arm, the second abutting member includes an annular groove and a sectional groove extending parallel to the drive shaft, the first elastic member is accommodated in the annular groove, and the abutting arm is movably accommodated in the sectional groove and is located radially inward of the first elastic member. A rolling door brake device as described in claim 5, wherein the end of the support arm away from the second brake disc axially protrudes from the annular groove, and the support arm can push against one end of the first elastic member in the rotation direction to radially deform the first elastic member. A rolling door brake device as described in claim 1, wherein the drive shaft includes a non-circular section and a circular section, the chain plate and the second abutment sleeve are arranged on the non-circular section, and the second brake plate and the first abutment sleeve are arranged on the circular section. A rolling door brake device as described in claim 1, wherein when the chain is pulled, the chain plate rotates to drive the transmission shaft and the second abutment, and the second abutment pushes against one end of the first elastic member to cause the first elastic member to deform radially without pressing against the base. A rolling door brake device as described in any one of claims 1 to 8, wherein the second abutment member includes a receiving groove and a limiting hole connected to the receiving groove, the drive shaft passes through the receiving groove and the limiting hole, and the second elastic member is sleeved on the drive shaft and received in the receiving groove. A rolling door brake device as described in claim 3, wherein the second brake disc includes two radially opposite protrusions, and the first abutting member includes two recesses corresponding to the two protrusions; the first abutting member includes a supporting arm, and the second abutting member includes an annular groove and a sectional groove extending parallel to the drive shaft, the first elastic member is accommodated in the annular groove, and the supporting arm is movably accommodated in the sectional groove and is located radially inward of the first elastic member; one end of the supporting arm away from the second brake disc protrudes axially from the annular groove , the arm can push against one end of the first elastic member in the rotation direction to deform the first elastic member in the radial direction; the first elastic member is a torsion spring; the transmission shaft includes a non-circular section and a circular section, the chain plate and the second abutment are sleeved on the non-circular section, the second brake disc and the first abutment are sleeved on the circular section; the non-circular section includes at least one plane; when the chain is pulled, the chain plate rotates to drive the transmission shaft and the second abutment, and the second abutment pushes against the first One end of an elastic member causes the first elastic member to deform radially and not to abut against the base; the second abutting member includes a receiving groove and a limiting hole connected to the receiving groove, the drive shaft is inserted into the receiving groove and the limiting hole, the second elastic member is sleeved on the drive shaft and received in the receiving groove; a cross-sectional profile of the limiting hole corresponds to a cross-sectional profile of the non-circular segment; the second elastic member is a compression spring; the base includes an inner ring wall and an outer ring wall radially outwardly arranged with a spacing ring on the inner ring wall, the The metal coil is accommodated between the inner ring wall and the outer ring wall, and the second engaging member is accommodated on the radial inner side of the inner ring wall; the rolling door brake device further includes a gasket between the magnetic plate and the metal coil, the gasket is provided with at least one second through hole, and the at least one engaging protrusion is penetrated through the at least one second through hole; and the manual mechanism further includes a pull rod, the pull rod is biased to a side of the chain plate away from the clutch mechanism, and the pull rod can drive the second brake disc to move toward a side away from the first brake disc.

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